Chlor-alkali chemicals forum index

This post was last edited by Kang Zhaoyang on 2014-12-23 at 20:16. Information on the chlor-alkali industry: Serial number, Category name: 1. Monthly report on China’s chlor-alkali market for September 2007; 2. Analysis of the development trends in the global natural gas industry in 2007 and subsequent years; 3. Baotou Menghan Industry’s production capacity of 720,000 tons; 4. Should the company expand its production capacity to 200,000 tons of caustic soda, with an accompanying production capacity of 200,000 tons or 250,000 tons of PVC?; 5. Survey with prizes for information on domestic caustic soda production; 6. Baotou Menghan Industry’s production capacity of 720,000 tons; 7. PVC production volume in Inner Mongolia; 8. How is Shandong Yongda Chemical’s performance in the chlor-alkali industry? 9 Recommended projects for the treatment of \"three wastes\" in chlor-alkali enterprises 10 What are the prices per 10,000 tons for several ion-exchange membrane electrolyzer manufacturers currently? 11 According to the entry requirements for the chlor-alkali (caustic soda, polyvinyl chloride) industry, what should be the economic scale of caustic soda production facilities? 12 Product chain diagram of the chemical industrial park in Wanzhou District, Chongqing 13 Reasons why the cost of caustic soda in China is higher than abroad, and measures to narrow this gap 14 Does sea salt chemistry fall under the chlor-alkali chemical industry? 15 Hubei Yihua Group’s 600,000-ton caustic soda production project in Wanzhou comes online 16 The chemical industry is an industry that tends to be overlooked 17 Will ion-exchange membrane technology for soda production replace diaphragm-based methods? 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Last edited by *ou*ngzhe on 2007-12-19 10:30 ]

Once, twice – Saline exchange content: Sequence number, Category name. 1: What is the price of industrial salt as a raw material? 2 Quality standards for industrial salt as a raw material 3 Exchange of experience regarding the use of well water salt as a raw material 4 Raw brine 5 Requirements for the salt used in the production of ion exchange membranes as a raw material 6 Issues related to the use of well water or mineral salt as raw materials 7 Who knows the standards for molten salts? 8. Raw materials: Issues related to the raw materials used in chlor-alkali production and site selection. 9. Discussion on the usage and specifications of raw salt. 10. Instruments: Is there any type of measuring instrument that can detect the ion content in primary or secondary brine? 11. Equipment: SRS method, HVM membranes. 12. Equipment: Chelating resin towers. 13. Equipment: Fiberglass-reinforced plastic storage tanks for refined brine. 14. Manufacturers of secondary brine. 15. What model of pump is used in the salt sludge transportation process in the brine handling section of chlor-alkali plants? 16 For the HCl storage tank used in brine treatment in chlor-alkali chemical production, is fiberglass-reinforced plastic a good choice? 17 What about graphite-chelating resin towers? 18 Calculation of the resin tower in the equipment 19 Press filters in the equipment 20 Working principle of the salt sludge press filter 21 Manufacturers of the salt sludge press filter 22 Heat exchangers for primary brine in the equipment 23 Pumps used for primary brine 24 Prices: Market prices of calcium chloride-based frozen brine 25 What should be done if scaling constantly occurs in the main pipelines? 26 Is PO/CS or CPVC better for pipes carrying primary and secondary brine? 27 Material selection for pipes carrying primary brine 28 Production and functions of brine at 0 degrees Celsius and 35 degrees Celsius 29 CaCl₂ aqueous solutions in the process 30 What is the purity of mirabilite produced by the CIM method? How many other substances are there? 31 Process: Excessive Fe ions. 32 Process: HVM membrane filtration for brine purification. 33 Process: Underground salt handling in the HVM brine process; salt is transported using dump trucks. 34 Process: SRS CIM HVM. 35 Process: Treatment of SRS concentrate. 36 Method of storing chelating resins. 37 Reasons for the breakdown of chelating resins? 38. What is the distributor in the process chelating resin tower? 39. Who are the suppliers of water caps for process chelating resin towers? 40. How is process chelating resin used in the chlor-alkali industry? 41. What is the stirring device for the brine tank in underground salt production processes? 42 Separation and drying of iodine in the process 43 Several issues related to brine mixing in the process 44 Recovery of wastewater from the chelating resin unit in the secondary purification stage of the process 45 The secondary brine process 46 Discussion on the quality of secondary brine 47 Impact of Ni in secondary brine on membrane performance? 48 Which ion concentrations in the secondary brine of the process have an impact on the ion exchange membrane? 49 How is the amount of brine measured in each unit of the process? 50 Blockage of fine salts in the salt preparation water for the process. 51 Issues related to nitrate removal using simple CIM in this process. 52 How to address the problem of iodine content in the brine? 53 The process brine contains ammonium. 54 What is the required maximum level for the total amine (or ammonium) content in the secondary brine produced in ion-exchange membrane caustic soda production? 55 Experts in calcium chloride processing 56 Corrosivity of frozen saline in calcium chloride processing 57 Processes for removing sulfate ions from brine in the chlor-alkali industry 58 Please discuss the feasibility and specific methods for recovering barium sulfate 59 Seeking advice on SRS membrane filtration from Kemidi in Canada 60 Seeking solutions for treating back-turbidity in brine 61 What is the difference between Kem membrane and Gore membranes? 62 Does anyone have a comparison of production processes using ion exchange membranes and diaphragm methods? 63 Are there any experts here who are familiar with seawater-based chlor-alkali production? 64 Help needed: I’m looking for reference books on the purification of raw salt and brine in chlor-alkali processes Thank you... Process 65: Removing organic substances from brine and concentrating the brine. Process 66: How to remove iodine from brine. Process 67: How to utilize the wastewater from the refining stage of secondary brine. Process 68: How to improve the efficiency of pre-treatment units. Process 69: How to accurately measure total ammonium and nitrogen trichloride. Process 70: Utilization of the supernatant fluid. Process 71: What are the advantages of using acidic brine in this process? Process 72: What are the reasons for severe resin leakage in the resin tower? How to deal with it? Thank you! 73: After regeneration, the resin in the process resin column tends to clump together. 74: Which company uses membrane-based nitrogen removal in this process? 75. Solubility of sodium carbonate and sodium bicarbonate in this process. 76. Will sodium carbonate react with barium ions in this process? 77. Provide a technical solution for removing sulfate ions using nanofiltration in this process, and carry out pilot tests as needed. 78. How to convert salts in the Wanfang brine pond? 79. Please suggest methods for dealing with salt sludge in this process. 80. Comprehensive utilization of salt sludge in this process. 81. Issues related to the disposal of salt sludge in this process. 82. Is it necessary to add hydrochloric acid for neutralization during the second purification stage of saline water in this process? 83. Corrosion prevention in the saline water processing section. 84. Where and how is steam generally added in the saline water processing section? 85 How to remove sulfate ions during the purification of process brine? 86 How to remove chloride ions from process brine? 87 Are there any manufacturers that use direct heat exchange between process brine and hydrogen? 88 The impact of organic substances in process brine on ion-exchange membrane caustic soda production units. 89 Process primary brine. 90 What is the T.O.C. of process primary brine? 91. Issue regarding the amount of refining agent added to the primary brine in Process 91 (seeking expert advice). 92. What is the purpose of the intermediate tank for primary brine in Process 92? 93. Process related to primary brine in Process 93. 94. Refining of primary brine in Process 94. 95. Amount of refining agent used for primary brine in Process 95. 96. Problems related to primary brine in Process 96. 97. Addition of additives to primary brine in Process 97. 98. Why is Mg2+ removed first and then Ca2+ in primary brine processing? 99. What is the process flow for producing chlor-alkali from brine in Process 99? 100. Clouding in the pre-treater of Process 100. 101. Re-clouding in the pre-treater of Process 101. 102. Could clouding in the pre-treater be caused by an excessive amount of alkali? 103. Is a pH value of 8–9 normal in the clear liquid area of the pre-treater in Process 103? The brine is very turbid. 104: Method of adding salt to the crude salt in this process. 105: How are calcium and magnesium ions removed during the purification of brine? What is the relationship between calcium and magnesium ions and the raw salt? 106: How can Process 106 ensure that the wastewater generated during the regeneration of resin towers meets regulatory standards while minimizing costs? 107: What are the most commonly used brand of valves in the primary and secondary brine processes, and what is their performance like? 108: Operations related to primary brine. 109: Material – chloroether resin

Electrodechlorination (dechlorination cell) – AC-related information. Serial number, classification name: 1. Material – What materials are used in ion membrane electrolysis platforms according to standard specifications? ? 2. The optimal timing for replacing membranes in ion membrane electrolyzers 3. Causes of corrosion at the ends of the saline branch pipes in anti-corrosion membrane electrolyzers and solutions to these problems 4. Analysis methods for chlorates 5. Discussion on the “high electric density, zero pole distance electrolyzer” process 6. What is the typical concentration of chloride ions in 30% membrane alkali used in this process? 7. The amount of fresh saline to be added to the Beihua Electromechanical electrolyzers 8. High cell voltage – why is the hydrogen content in chlorine high and not decreasing? 9. Temperature of the alkali solution used for starting up the single-tank process unit: 10. Type of vacuum device used for dechlorination of the process brine: 11. Is it possible to avoid using sodium sulfite in the vacuum dechlorination of process brine? 12. What are the reasons for the increase in free chlorine in the process brine? 13: Problem of alkali in hydrogen gas at the outlet of the process electrolyzer. 14: Decline in current efficiency of the process electrolyzer and membrane leakage – seeking advice from experienced experts. 15 Formulas for adding acid to process electrolytic cells and for converting acidity to pH values. 16 What are the consequences of too low an alkaline concentration in the cathode solution of process electrolytic cells? 17 Is it more cost-effective to use process electrolyzed hydrogen as a fuel or as a chemical raw material? 18 Solutions to problems related to electrical shocks in process electrolysis. 19 Decrease in the amount of alkali produced by process electrolytic cells. 20 The quality of chlorine gas produced by process electrolytic cells. 21 Is it normal for the current in process electrolytic cells to be low while the temperature is high? 22 Chemical equations for the process electrolyzer 23 Little change in the pH value of the brackish water after adding acid to the process electrolyzer 24 Should the saltwater fed into the process electrolyzer be supplied from a sump or by pump? 25 The salt water supply pipe in the process electrolyzer turns red 26 Why is there more moisture in the chlorine gas produced in the process electrolyzer compared to hydrogen gas? 27 Discussion on the concentration of sulfate ions in the process electrolyzer 28 Principles behind adding acid to the saltwater fed into the process electrolyzer and methods for calculating the amount of acid to be added 29 Abnormal fluctuations in the flow rate of saltwater in the process electrolyzer 30 What are the main side reactions at the anode and cathode in the process electrolyzer? 31 Where does the oxygen in the cathode of the process electrolyzer come from? 32 Adding plates to the process electrolyzer. 33 Process electrolysis technology. 34 Calculation of process current efficiency?? Cathode!~35 Manufacturing of modified process membranes. 36 Concentration of the electrolyte in process membrane electrolyzers. 37 Starting up a process membrane electrolyzer. 38 How long after stopping a process membrane electrolyzer before it can be restarted without replacing the membrane. 39 Issues related to adding acid to the brine used in process membrane electrolysis. 40 Problems with alkaline brine used in process membrane electrolysis. 41 Overcurrent in the process. 42 Reasons for high voltage in individual cells after membrane replacement. 43 Adding pure water to the alkaline tubes in the process. 44 Should a sump be used for the brine fed into the electrolyzer? What kind of valves are generally used for the brine fed into the 45 process tank? 46 Reasons for the difference in sodium sulfate content at the inlet and outlet of the electrolyzer in this process 47 What should be considered when inspecting the electrolyzer at the process inlet 48 Is it worthwhile to repair pinholes that appear in the ion exchange membrane used in this process? 49 Which manufacturers produce ion exchange resin towers of good quality? ? ? 50. What is the sodium chloride content in the caustic soda produced by the ion exchange membrane process electrolyzer? 51. What is the issue with sulfate ions in the dilute brine produced by the ion exchange membrane process? Reasons for bubbling during low-current operation of 52-process ion exchange membranes! ! ! 53 Control of the amount of acid added to process ion membrane electrolyzers 54 Problems related to acid addition in process ion membrane electrolyzers 55 How is the pressure difference between chlorine and hydrogen controlled in process ion membrane electrolyzers? 56 The optimal concentration of brine when a process ion membrane electrolyzer reaches its operating capacity 57 Composition of the active cathode coating in process ion membrane electrolyzers 58 Selection of pipes for brine and alkali solutions in process ion membrane electrolyzers 59 Coatings used in process ion membrane electrolyzers 60 Main parameters for the operation of process ion membrane electrolyzers 61 Power consumption in process ion membrane electrolysis 62 Effective methods for recovering chlorine water from process ion membrane electrolysis 63 Discussion on chlorate levels and acid addition in process ion membrane electrolysis systems 64 Issue of free chlorine in the dilute brine used in process ion membrane electrolysis 65 What are the requirements regarding hydrochloric acid used in process ion membrane electrolysis? 66 Causes of bubbling in process ion membrane electrolyzers and preventive measures 67 Is it necessary to soak the membranes when replacing them in process ion membrane electrolyzers? 68 Main chemical reactions responsible for increased sodium chlorate levels in the dilute brine produced by process ion membrane electrolyzers 69 Dechlorination process for the dilute brine produced by process ion membrane electrolyzers 70 Energy consumption per ton of product in process ion membrane electrolysis 71 Process flow diagram for process ion membrane electrolysis 72 Freezing point of the solution produced by process ion membrane electrolyzers 73 Reasons for excessive iron levels in the secondary brine in process ion membrane electrolysis and countermeasures 74 Material requirements for the “cathode liquid receiving tank” in process ion membrane electrolysis projects 75 Issue of sodium chlorate content in the alkali product produced by process ion membrane electrolysis 76 Ways to extend the lifespan of membranes in process ion membrane electrolysis technology 77 Problems related to chlorate levels in process ion membrane electrolysis 78 Key differences between process ion membrane electrolysis units and traditional units 79 Industry standards for liquid potassium hydroxide produced by process ion membrane electrolysis 80 Is all H2 produced in chlor-alkali processes obtained through water electrolysis? 81 Do the active groups in the ion membrane structure used in the chlor-alkali process include hydrogen ions? 82 Exchange on electrolysis technology in the chlor-alkali industry. 83 Chlorates in the production process. 84 Problems related to chlorates in the production process. 85 In your opinion, where does the natural circulation in the ion membrane electrolyzers of your company manifest itself? 86 Principles of forced circulation and natural circulation electrolyzers in this process. 87 Reasons for abnormal flow rates in the anode and cathode streams of forced circulation electrolyzers in this process. 88 Reasons for abnormal flow rates of the anode and cathode in forced circulation electrolyzers in this process. 89 What is the solubility of sodium hydroxide at room temperature? Issues related to the water seal in Process 90; Dechlorination in Process 91; Problems and solutions in the dechlorination step of Process 92; Anti-corrosion measures for the dechlorination step in Process 93; Should the vacuum level in the dechlorination tower of Process 94 be set at –70 kPa?; Liquid level in the dechlorination tower of Process 94; Effects of the vacuum level on the dechlorination tower of Process 94; Dechlorination efficiency in Process 94; How many options are available for vacuum pumps used in the dechlorination process of Process 94?; Problems encountered in the dechlorination process of Process 94!; Why doesn’t overflow occur after the electrolytic cell trips in Process 95?; The oxygen content in chlorine produced by the diaphragm electrolytic cells in our factory is quite high in Process 95; I would like to understand the importance of the pH value of brackish water in Process 96; What is the amount of sodium sulfite required? 104 Process Sodium Sulfite Addition Port! Can sodium sulfite and sodium chlorate react in Process 105 under alkaline conditions? Can sodium sulfite in the 106 process react with sodium chlorate under alkaline conditions? Bubbling starts to occur at a current of 3000A on the anode side of process 107. What could be the reason? What is the chemical reaction equation for the formation of nitrogen trichloride in the anode chamber of Process 109, where acid is added to the anode in Process 108? 110 Selection of process liquid-ring vacuum dechlorination pumps 111 Sparking at the process cathode 112 Corrosion of the gasket on the cathode outlet hose in the process 113 Excessive sodium carbonate content in the process catholyte 114 Free chlorine in the process 115 A question regarding the working principle of ion exchange membranes in the process 116 Issues related to dechlorination in the process 117 Are zero-gap electrolyzers used in this process? Please share your experience with the use of polarization rectifiers. 118 Should diaphragm caustic production methods be phased out? 119 What are the methods for dealing with waste asbestos fibers in diaphragm caustic production processes? 120 What are the main aspects that need to be inspected during the maintenance and overhaul of electrolyzers? 121 Causes of pinholes in ion exchange membranes and ways to prevent them 122 Repair of ion exchange membranes 123 Oxidation-reduction potential meters

Electrolyzers, rectified AC-related content: Serial number, classification name. 1: Equipment; 6801: Membrane. 2: Equipment; Summary of issues related to the use of BiTAC cell electrolyzers. 3: Equipment; Usage details of the F4401 membrane. 4: Equipment; ORP oxidation-reduction potential meters; Lifespan of products manufactured by domestic companies. 5: Equipment; Introduction to active cathode electrolyzers produced by Beihua Machine. 6: Equipment; How to distinguish between ion-exchange membrane electrolyzers and diaphragm electrolyzers based on their appearance? 7. What are the differences between DuPont membranes and Asahi Glass membranes for equipment use? 8. What are the prices of 10,000-ton capacity ion membrane electrolyzers offered by various companies? 9. How to build a chlorine-alkali membrane testing setup. 10. Damage to ion membranes. 11. Ion membrane electrolyzers. 12. Methods for detecting and testing pinholes in ion membranes. 13. Should pneumatic valves be installed on the chlorine gas main pipes in chlorine production plants? 14 For the electrolyzers used in chlorine production equipment, should nitrogen be filled on the cathode side first when a single cell is taken out of service, or should nitrogen be introduced to that side after the cell is removed from the system? 15 What are the steps for emergency shutdown of electrolysis processes in chlorine production equipment? I’d appreciate some guidance! 16 Does anyone have detailed information on ICI’s ion exchange membrane electrolyzers used in such equipment? 17. The equipment requires a set of Type 16 diaphragm cells with an annual production capacity of 20,000 tons. 18. Equipment using Asahi Kasei’s 6801 membrane. 19. Equipment using Asahi Kasei’s F4400 series membranes. 20. In the equipment using Asahi Kasei membranes, the brine contains a high level of chlorine. 21. How can the current efficiency of Asahi Kasei’s naturally circulating electrolysis cells be improved? Is there any unit using the 2030 DuPont membrane in equipment No. 22? Does anyone know anything about the new INOES ion exchange membrane cells used in equipment No. 23? 24 Questions regarding process ion exchange membranes 25 Queries about chlorine production plants: several issues related to electrolyzers 26 Process: Control of hydrogen-chlorine pressure in Japanese chlorine production plant electrolyzers 27 Process: Usage of ion exchange membrane electrolyzers produced by Asahi Kasei in Japan 28 Materials: What materials are used for electrolyzers? Content on rectified alternating current. Serial number, classification, and name: 1. Equipment: Possibility of replacing copper busbars with aluminum busbars in electrolytic rectifiers 2. Equipment: Why is the primary voltage level of rectifier transformers generally 35 KV? 3. Equipment: Short-circuit and fire accidents in rectifier cabinets 4. Equipment: How to eliminate the voltage difference between rectifiers and electrolyzers

Exchange topics on hydrogen chloride and waste gas treatment. Serial number, category name: 1. Process – Does anyone know how to reduce the moisture content in chlorine gas to below 10 ppm? 2. Standards – Calcium hypochlorite **standards. 3. Materials – What material should be used for sodium hypochlorite storage tanks? What materials do you use for the 4 material fillers and the 5-material chlorine pipelines used in batch production? 6. Material of chlorine gas pipelines; 7. Material of the tank used for ammonia removal in chlorine water treatment; 8. Valves: valves specifically designed for chlorine gas; 9. Corrosion of sulfuric acid storage tanks; 10. Analysis of chlorine gas: online measurement of moisture content; 11. Reasons for combustion in sodium hypochlorite storage tanks? 12. Whether sodium hypochlorite in the production process contains impurities. 13. The production process of sodium hypochlorite. 14. Comparison of the advantages and disadvantages of continuous vs. batch production of sodium hypochlorite. 15. Using sodium hypochlorite for water bleaching. 16. Storage of sodium hypochlorite solutions. 17. How to maintain stable chlorine pressure during the reaction in the production of sodium hypochlorite. 18. Problems related to sodium hypochlorite production. 19. Sales and applications of sodium hypochlorite. 20. Production of sodium hypochlorite. 21. What is the mass fraction of hydrogen gas coming out of the hydrogen purification system? 22 Process: Chlorohydrogen process flow when diaphragms and ionic electrolysis coexist. 23 Process: Adjusting chlorine pressure. 24 Process: Discussion on the recovery of defective sodium hydroxide! ! ! 25 Process: Preparation of hyposodium. 26 Process: What should be done with the excess hydrogen? 27 How to clean the sulfuric acid heat exchanger in the process? 28 How to handle a fire in the hydrogen system of a chlor-alkali plant? 29 What is the purity of the chlorine gas produced by the chlor-alkali system? What are the main impurities detected in the chlorine gas produced by the 30-process chlor-alkali system? 31 High hydrogen content in process chlorine – what are everyone’s opinions? 32 Performance of bubble towers in the treatment of process chlorine. 33 Comparison of process chlorine purity across different processes. 34 Issues related to the purification of process chlorine. 35 Drying of process chlorine. 36 Common problems in process chlorine drying and their solutions. 37 Methods for drying process chlorine. 38 Summary of methods for drying process chlorine. 39 What are the new technologies available domestically and internationally for process chlorine drying? 40 Material balance and energy balance in process chlorine drying systems. 41 Is sulfuric acid added continuously during process chlorine drying? 42 Positive and negative pressure systems in process chlorine drying equipment. 43 Problems related to fires in wire mesh collectors used for process chlorine. 44 What type of packing is used in process chlorine washing towers? 45 Reasons for high pressure in process chlorine systems. 46 Pressure control in process chlorine systems. 47 Impurities present in process chlorine. 48 The effectiveness of process chlorine as an oxidant in wastewater treatment. 50 Functions of chlorine water tanks and control of liquid levels. 51 Utilization of chlorine water. 52 What is the explosion limit of hydrogen in chlorine? 53 To what extent can the water content in chlorine be reduced? 53 Water content in process chlorine and production safety 54 Discussion on the water content issue in process chlorine 55 Problems with the pumps for concentrated H2SO4 in the process? 56 Cooling outlet temperatures for hydrogen in stages 1 and 2 of the process 57 Reasons for the negative pressure in hydrogen handling during the process 58 Locations where hydrogen is discharged in the process 59 Hydrogen purification system in the process 60 Are there any effective ways to recycle the wastewater generated by the hydrogen washing tower? 61 Ignition of process hydrogen. 62 Questions regarding maintaining the stability of sodium hypochlorite in the process. 63 What are the possible reasons for high liquid levels in the dechlorination tower after process shutdown? Why does the tail chlorine pipeline in Process 64 frost over? 65 Is it appropriate to use alkaline solution in this process to absorb leaked liquid chlorine? 66 Waste gas treatment related to hydrogen in this process. 67 What does effective chlorine mean in this process? 68 What material is suitable for sodium hypochlorite pipelines? 69 Safety of pipeline hydrogen systems 70 Insulation for pipeline hydrogen systems 71 Equipment: Chlorine materials at 28 degrees 72 Emergency response plan for sudden shutdown of membrane electrolysis equipment and chlorine compressors 73 Problem of broken impellers in chlorine pumps 74 Use of bubble trays for drying chlorine in chlor-alkali production 75 Information on the use of titanium fans for handling chlorine 76 Recently, an excessive amount of chlorine has been carried along during acid replacement in chlorine pumps 77 Chlorine compressors 78 Chlorine liquefaction units 79 Manufacturers of concentrated sulfuric acid pumps 80 Hydrogen compression and purification units 81 Hydrogen purification systems 82 Where can the check valve at the outlet of the hydrogen water ring pump be manufactured? 83. Filter element for the hydrogen mist collector in the equipment. 84. Hydrogen compressor in the equipment. 85. How to prevent vibration in the check valve of the outlet pipeline of the hydrogen compressor. 86. How to select a chlorine compressor for the equipment. 87. Chlorine absorption unit in case of equipment accidents. 88. Who is familiar with Bayer’s technology for chlorine drying? 89. Sign up for information on using Memocor’s mist eliminators for capturing water mist and acid mist. 90. Method of manufacturing acid foam catchers. 91. Acid mist collector. 92. Method of cleaning acid mist collectors. 93. Acid mist filter. 94. Filter element for acid mist and water mist collectors. 95. I recently encountered a problem while working on a course project related to the chlor-alkali industry: how to determine the height of a packed tower?

Contents related to liquid chlorine Sequence Number Classification Name 1. Safety precautions for filling liquid chlorine 2. Packaging of liquid chlorine 3. Materials: What materials should be used for valves in contact with liquid chlorine? 4. Conditions required for transporting liquid chlorine by tank trucks 5 Storage and transportation of liquid chlorine (vehicle unloading process) 6 Issues related to the transfer of liquid chlorine 7 Valves: Safety valves for liquid chlorine 8 Power consumption of 150,000-ton chlorine compressors in the production process 9 Problems associated with ammonia-based refrigeration in this process 10 What is the energy consumption of German 3K compressors? 11 Information on high-pressure and low-pressure methods in the process 12 Minor issues related to the purity of chlorine gas in the process 13 Problems associated with the liquefaction of chlorine gas in the process 14 Issues concerning the efficiency of chlorine gas liquefaction in the process 15 Should medium-temperature and medium-pressure methods or freezing methods be used for chlorine gas liquefaction? 16 How to handle situations where the freezer trips in order to ensure continuous operation of the process 17 Analysis of nitrogen trichloride emissions in the process 18 Purging and pressure testing during liquefaction in the process 19 Methods of transporting liquid chlorine and its storage period 20 A problem related to the liquid chlorine processing flowchart 21 Vaporization of liquid chlorine in the process 22 Vaporization of liquid chlorine in the process 23 Emissions from the vaporizers used for liquid chlorine vaporization in the process 24 Latent heat of vaporization of liquid chlorine in the process 25 Calculation of the heat required for liquid chlorine vaporization in the process 26 Cleaning plans for liquid chlorine-related equipment 27 Data on electricity consumption per unit of liquid chlorine production 28 Determining the amount of leakage in case of an accident involving liquid chlorine in the process 29 Issues related to the release of liquid chlorine 30 What is the maximum flow rate possible when liquid chlorine is transported through pipes with a DN50 diameter? 31. What material should be used for the gas pipeline in the liquid chlorine packaging system? 32. How to calculate the volume of liquid chlorine storage equipment? 33. How much does a KKK compressor cost? 34. What are the advantages of magnetic-driven submersible pumps for liquid chlorine? 35. Sending a set of photos of the refrigeration system for the equipment; hope it will be helpful to everyone. 36. Issues with the water quality of the chiller unit in the equipment? 37 Equipment: Chlorine compressor. 38 Manufacturer of the chlorine compressor equipment??? 39 Solutions for chlorine compressors. 40 Which manufacturers produce chlorine compressors? 41 What is the basis for the double-shell design of chlorine compressor coolers? 42 Equipment: Chlorine liquefaction unit. 43 Equipment: The suction capacity of the chlorine compressor has decreased; all parameters are within acceptable limits. The compressor was stopped for inspection and it was found to be functioning normally. 44 Status of the chlorine compressor equipment. 45 Reasons for the slow acid replacement process in the chlorine compressor. 46 Problems related to acid replacement in the chlorine compressor. 47 What is the reliability of using domestic high-pressure components in the chlorine compressor? 48 Issues with the speed increaser of the chlorine compressor in the equipment. 49 Corrosion of the intercooler in the chlorine compressor of the equipment. 50 Those using 3K chlorine compressors in their equipment, please register. 51 Which party has a submersible pump? ? ? 52 Equipment: Who knows which company makes the best large turbochargers these days? 53 Equipment: Dead bottle processor. 54 Equipment: In our company’s second-phase chlor-alkali system, the bearing housings of the German 3K turbochargers are leaking oil. 55 Equipment: For packaging liquid chlorine, is a submersible pump better or a shielded pump? Please share your opinions. 56 Equipment: Issues related to the pumps used for transferring liquid chlorine from storage tanks. 57 Equipment: Selection and use of valves for liquid chlorine. 58 Equipment: What methods can be used to open a liquid chlorine cylinder that won’t open? 59 The liquid chlorine processing process for equipment, as well as the manufacturers of various devices used in this process. 60 Packaging methods for liquid chlorine submersible pumps used in equipment. 61 Problems related to liquid chlorine submersible pumps used in equipment. 62 One issue with liquid chlorine submersible pumps used in equipment. 63 A minor issue with liquid chlorine submersible pumps used in equipment. 64 Vacuum pumps for liquid chlorine. 65 Intermediate tanks for liquid chlorine. 66 Is there anyone among those with experience who can help me solve the problem of the impellers in chlorine compressors breaking frequently? 67 Regarding the automatic filling system for liquid chlorine in the system. 68 What temperature do your manufacturers control for liquefying chlorine using compressors? 69 Does anyone have the quality system documents and relevant regulations related to the filling of liquid chlorine cylinders? I need them urgently

Evaporation, solid-alkali related topics: Serial number, classification name. 1. Material selection for evaporators; 2. Material selection for the heating chamber of evaporators; 3. Concept – Who can explain in detail the concept of \"falling film\"? 4. Process-related issues: Corrosion in 32% alkali tanks; 5. Process-related issue: What is the steam consumption for 48% caustic soda? 6. Problems of crystal formation in long-distance alkali pipes in the process; 7. Flow diagram of the three-effect counter-current process for diaphragm caustic soda production; 8. Prospects for the application of chemical heat transfer enhancement techniques in the caustic soda evaporation process; 9. Issues related to alkali concentration in the process; 10. Alkali solution jet pumps – what material do you recommend? 11 Increase in the amount of alkaline solution used in the process 12 Problems related to the evaporation of alkaline solution in the process 13 Alkaline evaporation systems in the process 14 Selection of ion-exchange membrane caustic soda evaporation devices for use in the process 15 Solubility of sodium sulfate in 30% and 42% caustic soda solutions 16 Insulation issues related to long-distance transportation of alkaline solutions in the process 17 Corrosion problems caused by alkaline solutions on equipment! 18 Process: Alkali evaporation process. 19 What methods can be used to address the issue of high salt content in the final hypochlorite product? 20 What is the actual flow rate that can be achieved when using Hangji pumps in the evaporation process? 21 Analysis of the decrease in alkali production during the evaporation process. 22 Selection of equipment for alkali evaporation. 23 Equipment: steam traps. 24 Equipment: large-scale vapor condensers for evaporation. 25 Relationship between the reduced area of the heating chamber in evaporators and production volume. Topics related to solid alkali: Sequence number, classification name. 1 Process: Reasons for the thinning of the walls of gas generators used in solid alkali production. 2 Process: Issues related to flake alkali. 3 Process: Technologies for producing flake alkali. 4 Equipment: Manufacturers involved in the production of granular alkali. 5 Equipment: Solutions to problems related to molten salts in the flake alkali production systems manufactured by Swiss company Botz

Contents related to hydrochloric acid Sequence Classification name 1 Control standards for standard high-purity hydrochloric acid 2 Process Molality ratio of H2 and Cl2 used in the synthesis of HCl via graphite 3 Steam generated as a by-product in the two-in-one process furnace 4 What level of oxygen content should be controlled in the chlorine used in hydrochloric acid synthesis? 5 How can the chlorine-to-hydrogen ratio be controlled using a synthesis furnace to obtain high-purity HCl gas? 6. Control of the hydrogen-chlorine ratio in the synthesis of hydrogen chloride using this process. 7. Overheating of the hydrogen gas pipelines in the hydrogen chloride synthesis furnace under this process. 8. Hydrogen chloride desorption in this process. 9. Emergency measures to take when the absorption unit for hydrogen chloride stops working under this process. 10. What is the heat of reaction in the chlor-alkali and hydrochloric acid production processes? 11. Synthesis of hydrochloric acid by combining chlorine gas and hydrogen gas using this process. 12. Changes in the color of the flame resulting from the combustion of chlorine gas and hydrogen gas. 13. What is the heat of reaction between chlorine gas and hydrogen gas inside the synthesis furnace under this process? What are the reasons for explosions in the 14-process chlorine-hydrogen synthesis and 15-process three-in-one graphite furnace? 16. Large fluctuations in the hydrogen pressure entering the graphite synthesis furnace in this process; there are both positive and negative pressures. 17. Startup of the acid pump in this process. 18. Discussion on the three-stage absorption process used in hydrochloric acid production. 19. How much hydrogen chloride is lost after conventional desorption of hydrochloric acid and subsequent closed-loop circulation. 20. Electrolysis of hydrochloric acid in this process. 21. Determination of the amount of circulating hot water and circulating cooling water required in the hydrochloric acid production process. 22. Synthesis of hydrochloric acid in this process. 23. How to control the chlorine concentration during hydrochloric acid synthesis, how to monitor it, as well as how to control the ratio between chlorine and hydrogen and how to measure it. 24. Desorption process for hydrochloric acid. 25. Deep desorption of hydrochloric acid. 26. What is the minimum purity required for chlorine used in hydrochloric acid production? 27 A problem that occurs when shutting down the hydrochloric acid process… Experts, please help! 28 The zero-desorption process in the hydrochloric acid desorption process. 29 Where do the problems arise in the hydrochloric acid separation process? 30 Process: Does anyone know the techniques related to hydrochloric acid resolution? 31 Material of the high-purity hydrochloric acid pipeline in the system. 32 Aging of the explosion-proof membrane in the combined furnace equipment. 33 Combined graphite synthesis furnace in the equipment. 34 Reasons for abnormal liquid level in the falling film absorber within the combined graphite synthesis furnace system. 35 Steel-lined F4 pipelines in the hydrochloric acid produced as a by-product by the equipment. 36 Domestic manufacturers of high-purity hydrochloric acid. 37 Massive peeling off of the inner wall material of the graphite hydrochloric acid synthesis furnace. 38 How to recover the remaining HCl when using a spin converter? 39 Selection of hydrochloric acid synthesis furnace for the equipment; 40 Points to consider when purchasing the hydrochloric acid furnace; 41 Creation of negative pressure in the organic matter separator after hydrochloric acid absorption by the equipment; 42 Selection of the hydrochloric acid absorption system for the equipment

General discussion topics on caustic soda: Serial number, Category name: 1. Valves – Nickel valves; 2. Emission standards for chlor-alkali industries; 3. Standards related to related products; 4. Materials – What material is HAC-276?; 5. What materials are most suitable for use in each processing stage? 6. Prices of materials used for caustic soda production 7. Applications of titanium in the chlor-alkali industry 8. Downstream products of hydrogen chloride in the chlor-alkali industry 9. Common knowledge: Solubility issues related to mirabilite 10. For electrical systems in the chlor-alkali industry, is it better to use the grid or generators as a power source? 11. Combined heat and power generation in electrical systems 12. Pressure levels at which valves are used 13. Expert answers regarding valves: valve_expert@foxmail.com 14. How to choose valves in the ion-exchange membrane caustic soda production process? ? ? 15 Corrosion resistance: How do different temperatures and concentrations of caustic soda affect the corrosion of stainless steel? 16 Anti-corrosion for floors; 17 Anti-corrosion for chlor-alkali equipment – the use of resin glass flake in anti-corrosion materials; 18 Anti-corrosion issues in the chlor-alkali production process! 19 Analysis of the electrolysis workshop 20 Analysis of methods for measuring chloride ion concentration 21 Processes Materials from the 2007 China Chlor-alkali Forum (Guilin conference) 22 Process pressure swing adsorption 23 What are the reasons for water spraying from the process make-up air valve? 24 How to restart a process after a long period of shutdown? 25 Let’s discuss the chlor-alkali processes in China. 26 Electrolysis consumption in the process. 27 Waste water treatment in this process. 28 Discussion on methods for treating mercury-containing waste water. 29 Exchange of experience among professionals in this field. 30 Alkali production using ion exchange membranes. 31 The process flow for setting up an alkali production facility using ion exchange membranes. 32 pH measurement in the ion exchange membrane alkali production process. 33 Issues related to the utilization of hydrogen produced in ion exchange membrane alkali production. 34 Can a chlor-alkali plant balance its own hydrogen supply? 35 The production process and main steps of process-based chlor-alkali production 36 How to balance the hydrogen gas produced as a by-product in process-based chlor-alkali production 37 The principles behind the chlor-alkali industry 38 Recent issues in the chlor-alkali chemical industry 39 Problems in the chlor-alkali industry 40 Where can one find small laboratory-scale chlor-alkali ion-exchange membrane electrolyzers? 41 Questions regarding the energy consumption metrics of diaphragm caustic soda production 42 Vibration in water pipes used in production processes 43 For a chlor-alkali production facility with a capacity of 100,000 tons, how many chlorine storage tanks are appropriate? 44 Basic knowledge of the petrochemical industry – The chlor-alkali production process 45 Water-based vs. oil-based substances 46 The impact of impurities in deionized water on ion-exchange membrane caustic soda production systems 47 What processes are generally used in China’s chlor-alkali industry nowadays? ? 48 Analysis of the advantages and disadvantages of the coexistence of diaphragm cells and ion-exchange membrane cells in chlor-alkali plants using this process. 49. Parameters of process instrument air 50. How to deal with high moisture content in process instrument air 51. Specific consumption of process water 52. A metaphor to describe the chlor-alkali industry 53. Process optimization for the chlor-alkali process 54. Kinematic viscosity of process oils 55. Should nitrogen or liquid be introduced first when starting up an electrolyzer? 56. Which by-product is better to use in alkali production? 57 Methods for producing chlor-alkali using various processes~~58 Estimation of the cost of circulating water in chlor-alkali plants related to utility systems.pdf59 How much nitrogen is required for the production of caustic soda in utility systems? In which processes (locations) of caustic soda production are 60-mm CPVC pipes used? 61 Materials for underground pipeline networks 62 Which company produces the best CS shell-and-tube heat exchangers? 63 Regulations: Energy consumption accounting regulations for the chlor-alkali industry (2006) 64 Epichlorohydrin: Production process of epichlorohydrin 65 Calculating the energy consumption of utility systems in chlor-alkali enterprises 66 Please discuss the issues related to energy accounting in chlor-alkali enterprises 67 Energy-saving measures for chlor-alkali enterprises 68 How great is the potential for energy savings in the chlor-alkali industry? 69 What are the main water pollutants generated in the production of caustic soda through waste discharge? 70 Staffing arrangements in chlor-alkali plants. 71 Salaries in the chlor-alkali industry. 72 Voting on the areas under responsibility of employees in the chlor-alkali industry. 73 Service life of CS/PO equipment. 74 How to perform online cleaning of plate heat exchangers used in equipment. 75 Application of plate heat exchangers in the chlor-alkali industry. 76 Examples of plate tower designs. 77 Resin types used for fiberglass-reinforced plastic equipment. 78 Fiberglass resin for equipment. 79 Large converters used in equipment. 80 Principles, characteristics, and applications of electrolytic polishing. 81 Storage of electrolytic equipment. 82 Gaskets used in equipment. 83 Function of backwash tanks. 84 Which domestic centrifuge manufacturers are the best? 85 Cleaning of fouling on heat exchange equipment? 86 Equipment: Ion-exchange membrane caustic soda – plate heat exchanger orders. 87 Equipment: Pressure drop of spiral plate heat exchangers. 88 Application of spiral plate heat exchangers in the chlor-alkali industry. 89 Question: What is the usage of heat exchangers in the chlor-alkali industry? 90: Need contact information for the Chinese office of Lawrence Pumps in the United States for equipment. 91: Need a directory of manufacturers of liquid alkali! 92: Equipment related to caustic soda. 93: How to carry out pressure adjustment and install backflow prevention devices before gas sealing for equipment? 94 Equipment: Carbon bed filter. 95 Equipment: Calculation of liquid volume in elliptical horizontal tanks. 96 Equipment: In ion exchange membranes with sacrificial cores, what is a sacrificial core? Suggestions for improving the Mengmoke demister in the 97 series of equipment. What type of corrosion-resistant pipes and equipment should be used in the ion-exchange membrane caustic soda production process for 98 series equipment? Which companies manufacture equipment for producing solid alkali using 99-type equipment? Which design institutes are involved in the design of chlor-alkali industry projects? Which company designed each of your companies’ designs? 101 Design for caustic soda production; 102 Questions: Are there any exam questions related to the production of caustic soda using ion exchange membrane electrolysis? 103 Drawings: General layout of a chlor-alkali plant. 104 Maintenance: What are the main items included in the two regular major overhauls carried out each year in chlor-alkali plants? 105 Maintenance: Who has maintenance plans for ion exchange membrane electrolyzers? 106 System: Static grounding in chlor-alkali plants. 107 System: Request an interlock diagram for an electrolyzer cell. 108 System: How to improve the operational skills of DCS operators? 109 Project ICP. 110 Project: If one has just started working in the chlor-alkali industry, how should one perform one’s tasks well? 111 Project: How should large-scale ion exchange membrane caustic soda production facilities be designed? ? 112 What should the technical personnel of a project do before designing a caustic soda plant? 113 The chlor-alkali industry has the greatest negative impact in such projects. 114 The shift in power within the chlor-alkali industry (reposted). 115 Views on clean production in these projects. 116 Seeking help from experts who understand the economic analysis of chlor-alkali projects for guidance. 117 How can one become an excellent chief engineer for a chlor-alkali factory? 118 Project: Caustic soda production. 119 Project: How to select an equipment supervision unit for the caustic soda project. 120 Project: Who can provide a document on the quality and cost assessment of ion-exchange membrane caustic soda? 121 Project investment. 122 Project: A new 200,000-ton caustic soda and PVC production facility; guidance is needed regarding the requirements for water, electricity, and steam. 123 Project: Why is the voltage of the new membrane low? 124: What is the cost comparison for new projects involving ion-exchange membrane caustic soda production? 125: Are there any entities working on the technology related to ion-exchange membrane electrolysis for caustic soda production? 126: Has any company in this sector passed the assessment for safety production standardization? Project 127 involves construction and supervision units in the chlor-alkali industry that have proven track records; Project 128 is currently in the planning stage, and I hope to have more exchanges with colleagues in the chlor-alkali industry. What is the difference between the commissioning of DCS systems and their normal operational use? 130 Issues with pneumatic valves in instruments 131 Why is there a red color when recovering instrument air? 132 Instrumentation: Questions regarding lightning protection for instrument systems! This post was last edited by yzhms on 2008-7-23 13:42]

Other aspects:
Serial number, classification name:
1. Exploration of variations in PVC 70m3 polymerization production technology.
2. Comparison between the production technology of PVC 70m3 polymerization reactors and that of 105m3 polymerization reactors.
3. Problems that may occur during feeding in a PVC 70 cubic meter polymerization reactor.
4. PVC processing technology.
5. Some issues related to the transportation of dry PVC material.
6. PVC drying problems.
7. Quality specifications for PVC paste resin.
8. What waste heat can be utilized in PVC production?
9. Problems with PVC control valves.
10. Discussion on the particle size distribution of PVC.
11. PVC production process.
12. Water-to-oil ratio in PVC production.
13. When draining water after applying scale inhibitor to the reaction reactor in PVC production, the water seal is often damaged.
14. Methods of transporting PVC.
15. Is hydrochloric acid desorption suitable for PVC production projects?
16. Reasons for the formation of plasticized fragments at the PVC vibrating screen.
17. Use of steam in PVC production.
18. Issues related to water output in PVC VCM production.
19. PVC VCM polymerization.
20. Distances between closed-nozzle and high-speed mist nozzles and the outer wall of the PVC VCM storage tank in its automatic spraying system.
21. The deep desorption process for mercury removal in PVC VCM requires significant energy; can the low-pressure steam generated as a by-product of hydrogen chloride synthesis be utilized?
22. Analysis of the advantages and disadvantages of using heptane for heat removal in PVC VCM converters.
23. Discussion on conversion rates and changes in monomer quality after the implementation of PVC pressure swing adsorption.
24. Composition of crude vinyl chloride in PVC.
25. Record sheet for PVC monomer trial runs.
26. Technical report on PVC calcium carbide process.
27. Comparison of costs between PVC production via the calcium carbide method and the ethylene method.
28. What types of waste are generated in PVC VCM production using the calcium carbide method? Are there any information on the stages of waste generation and their quantities? Thank you! 30. Production process of acetylene using 29PVC calcium carbide. 31. Technical report on PVC calcium carbide. 32. Greater attention to safety is required when turning PVC calcium carbide blocks into powder. 33. Main components of the gas produced by PVC calcium carbide furnaces. 34. Design units for PVC calcium carbide systems. 35. Production process of PVC calcium carbide. 36. Market analysis of PVC calcium carbide. 37. Exhaust gases from PVC calcium carbide. 38. Consumption of PVC calcium carbide. 39. Issue of residence time of PVC calcium carbide in acetylene generators. 40. Reuse of the filtrate obtained through plate and frame filtration of PVC calcium carbide residue. 41. Conveying machinery for PVC calcium carbide residue. 42. Physical properties of PVC calcium carbide residue. 43. Composition of PVC calcium carbide residue. 44. Using PVC calcium carbide to produce cement. 45. To remove dissolved acetylene from sodium hypochlorite used in cleaning processes, can it be done by using a blower? What are the safety considerations? 46. Determination of the safe operating space for PVC polymerization reactors. 47. Discussion on post-treatment processes for dry-process acetylene production using PVC calcium carbide residue. 48. Dry-process acetylene generation. 49. Application of high-pressure diaphragm filter presses in the industry dealing with PVC calcium carbide residue. 50. There is an urgent need for information on the PVC production capacity of some manufacturers in Jiangsu. 51. Gas composition entering the vinyl chloride monomer compressor in PVC production. 52. How to handle the recovered gases during PVC polymerization, recycling, and discharging processes. 53. Discussion on the selection of pumps for adding polymerization dispersants in PVC production. 54. Production capacity of PVC polymerization reactors. 55. Ratio of vinyl chloride used as feed material in PVC polymerization reactors. 56. Use of chilled water in PVC polymerization. 57. Discussion on PVC polymerization additives. 58. Recent advances in PVC polyvinyl chloride industrial production technology. 59. Dehydration before PVC polyvinyl chloride polymerization can be achieved using liquid/liquid high-efficiency separators. 60. Advanced technologies for PVC polyvinyl chloride production – essential reading for chlor-alkali industry professionals. 61. Discussion on dehydration methods for vinyl chloride in PVC production. 62. What is the performance of screw compressors used for vinyl chloride in PVC production? 63 Problems associated with PVC vinyl chloride gas tanks 64 Flow rate of PVC vinyl chloride gas 65 What is the bottom pressure in the high-boiling-point reactor during PVC vinyl chloride production? 66 The saturated vapor pressure of vinyl chloride at 55 degrees. 67 Adhesions that form during the polymerization process of vinyl chloride in polymerization reactors, as well as the reasons for this and corresponding solutions. 68 Discussion on the layout of vinyl chloride converters. 69 Experience with the use of vinyl chloride converters. 70 Goodrich in the United States, 70 m3 polymerization reactors. 71 The use of Monsanto’s mist eliminators in PVC and silicone factories. 72 Stirring in the reaction tanks before and after PVC processing. 73 Please discuss the prospects and feasibility of dry acetylene production. 74 Does the vinyl chloride converter in your factory function as a pressure vessel? 75. Those with experience in producing acetylene via the calcium carbide method are requested to answer this question. 76. What are the methods for producing vinyl chloride in PVC production? 77PVC: Exploration of methods for dehydrating acetylene. 78PVC: Discussion on the differences between domestic dry-acetylene technologies and imported technologies. 79PVC: Discussion on the problems encountered during PVC commissioning. 80PVC: There is a need for a dedicated section to discuss additives used in vinyl chloride polymerization. 81PVC: Reasons why coarse products are generated during PVC polymerization in summer. 82PVC: Detailed process flow and control scheme (DCS) for producing PVC via the suspension method. 83PVC: Feasibility of using concentrated sulfuric acid for purifying acetylene. 84PVC: Service life of flip valves used with acetylene. 85PVC: Maximum temperature of water-ring compressors used in acetylene processing. 86PVC: Problems associated with acetylene crushing. 87PVC: Issues related to purifying acetylene gas using sulfuric acid. 88PVC: Acetylene production. 89PVC: Analysis of hazards and harmful factors in the acetylene production process. 90PVC: Reasons for shaft breakage in water-ring pumps used in acetylene processing. 91PVC: Prospects for PVC production using the ethylene method. 92PVC: Is there a production process for polyvinyl chloride foam? 93 Is there anyone in the PVC industry who works with PVC? 94 Compared to 30 m3 polymerization reactors, what are the characteristics of 70 m3 reactors? 95 Production of polyvinyl chloride using the seed method. 96 World production and consumption of PVC in recent years (2004–2006). 97 Those involved in PVC production, please report here! 98 Those who use SGL reactors, please register yourselves. 99 Basic knowledge on the types and properties of stainless steel. 100 Basic knowledge on acidity and pH. 101 Catalysts. 102 Problems related to catalysts. 103 Regulations for managing waste catalysts. 104 The application of soda ash ceramic ball valves in the soda ash industry. 105 Are there any people involved in soda ash production? 106 Chlorine dioxide: Production of chlorine dioxide What is the chemical reaction equation for producing glycine using the chloroacetic acid aminolysis method for 107 glycine? 108 Potassium perchlorate; Process for preparing potassium perchlorate. 109 What is the economic efficiency of using electrolytic hydrochloric acid to produce chlorine and hydrogen? 110 Process: Method for producing anhydrous calcium chloride from dihydrate calcium chloride. 111 Process: Why does the generator always overflow? 112: It’s been found that many people don’t understand EDIZA; I’ll share my understanding. 113: Technical discussion on the three-inlet lamp head in Process 114: When does resistance occur during the second stage of process conversion? Several issues regarding alloy steel 115 and AL-6XN alloy steel. 116 Reasons for the spontaneous combustion of activated carbon. 117 To perform calculations, it is necessary to understand various unit conversions from a fundamental perspective. 118 Methane chlorides: Discussion on the production of methane chlorides and related process issues 119 Information on potassium alkalis 120 Use of energy savers 121 Distillation – issues related to water removal during distillation 122 Cooling towers – things to consider when selecting cooling towers 123 Sodium thiosulfate – solubility of sodium thiosulfate 124 Hydrogen sulfide – absorption of hydrogen sulfide waste gas using liquid alkali 125 Hexachlorocyclotriphosphazene – information related to hexachlorocyclotriphosphazene 126 Recovery of chlorobenzene – issues related to the purification of chlorobenzene; please ask experienced colleagues for help 127 Potassium chloride – table showing the composition of potassium chloride hydroxide solutions 128 Potassium chloride? 129 Chlorinated paraffins – Chlorinated paraffin-52 HG 2092—91. 130 Chloromethane – The production process and consumption of chloromethane. 131 Chloroacetic acid – How to remove dichloroacetic acid from the hydrochloric acid produced as a by-product in the manufacture of chloroacetic acid. 132 Chloroacetic acid; crystallization of chloroacetic acid 133 Chloroacetic acid: crystallization of this substance 134 How to completely solve the problem of self-polymerization blockage in low-boiling towers used in vinyl chloride production 135 Sealing: What type of auxiliary sealing ring can withstand fluorine-containing substances? 136 Naphthalene polyring: Please discuss the market prospects for naphthalene polyring with experts. 137 Emission concentrations of caustic soda and polyvinyl chloride waste gases 138 Potassium hydroxide: Production processes for potassium hydroxide 139 Materials required for cleaning equipment and clean production audits 140 Sampling devices: Procedures for sampling 141 How can college graduates become engineers? 142 Can the chlorine gas produced in phosphorus trichloride electrolysis cells be used directly for producing phosphorus trichloride? 143 Trichlorosilane: Information related to trichlorosilane 144 Synthesis of trichlorosilane 145 Optimization of process parameters for trichlorosilane synthesis 146 Technical specifications for the distillation process of trichlorosilane 147 Requirements for chlorine and hydrogen gas in trichlorosilane production 148 Discussions on trichlorosilane 149 Production of trichloroethane by passing chlorine gas over dichloroethane 150 Control of low-boiling point towers in equipment 151 How are plate heat exchangers used in various factories? How can a 152 unit clean the low-boiling-point tower more quickly? 153 More specialized liquid-phase hydration machines. 154 Detailed operating procedures for York refrigeration units. 155 Humidification machinery and devices. 156 Recdevelopment of silicon tetrachloride products. 157 Building a large-scale used plastic trading market for plastics. 158 How many types of plastics are there in total? What is the most commonly used plastic? 159 Potassium carbonate – Operating procedures for the production process of potassium carbonate 160 Rubber with low calcium and magnesium content 161 Nitric acid – Purification of nitric acid 162 Hydrogen production – Which chlor-alkali companies in China are currently producing hydrogen through water electrolysis? 163 Feed methods for acid production using flue gas from acid-producing smelting processes 164 Conversion catalysts and issues related to their use 165 Basis for catalyst activation in converters 166 Hydrogen chloride gas pipelines in converters and the effectiveness of adding heat-resistant, corrosion-inhibiting, and scale-preventing agents in the converter system 167 Effects of circulating hot water along with such additives in converters

Contents on safety and environmental protection Sequence Number Classification Name 1 Safety technical standards for producing soda ash using ion exchange membranes 2 Emission standards for pollutants in the soda ash industry 3 Which manufacturers produce high-quality explosion-proof bridge cranes for electrolysis plants? 4 Safety precautions when starting up ion exchange membrane systems 5 How does chlorine fire occur and what are its hazards? 6 How to formulate safety operating procedures for chlor-alkali processes 7 Safe operations in chlor-alkali production 8 Hygiene protection distance standards for chlor-alkali plants (soda ash production via electrolysis) 10 Safety in chlor-alkali production 11 Accident prevention plans for chlor-alkali systems 12 Safety regarding chlorine gas 13 Safe operation of chlorine gas systems 14 Discussion on the safety of hydrogen gas cylinders 15 What are the basic operations after a circuit breaker trips? 16 I would like to ask about the environmental issues in the chlor-alkali industry. 17 How can high noise levels be addressed?