Technical exchange post on chlor-alkali industry ---- Sulfuric acid and sulfate ions

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This post was last edited by sunjl1981 on 2013-1-6 20:21. Discussion thread on chlor-alkali chemical technology ---- Sulfuric acid: 1. Utilization of barium sulfate; 2. How to handle sodium sulfate decahydrate; 3. Where is the most suitable position in a process involving brine for the treatment of sulfate ions? 4. Why is pure water used as the solvent for preparing sodium sulfite? 5. The crystallization heat of sodium sulfate. 6. The issue of separating potassium chloride from sodium sulfate. 7. Discussions on the process for removing sulfate ions from brine in the chlor-alkali industry! 8 Concentration of dilute sulfuric acid 9 Question regarding the calculation of sodium sulfite? 10 The effect of sulfate ions on ion-exchange membrane alkalis. 11 What is the freezing point of sodium sulfite at a concentration of around 10%? 12 New methods for removing sulfate ions from saline water! ! 13 Method of neutralizing concentrated sulfuric acid with caustic soda 14 Diagram of the production process for anhydrous sodium sulfate 15 What are the reactions of sulfate ions in metal anode electrolytic cells? 16 Issues related to the dehydration using concentrated sulfuric acid 17 Crystallization in pipelines carrying concentrated sulfuric acid 18 Acid sludge often forms in pumps and pipelines used for concentrated sulfuric acid 19 The impact of barium sulfate on the chlor-alkali production process 20 The role of sulfuric acid in chlor-alkali production 21 Solubility curve of sodium sulfate 22 How to handle the by-products resulting from the preparation of hydrogen chloride via the titration of sodium chloride with concentrated sulfuric acid 23 Methods for drying chlorine gas and treating chlorine-containing waste sulfuric acid 24 Please have experts analyze the process for removing sulfate ions 25 The relationship between barium and sulfate ions 26 Which companies use 95% concentrated sulfuric acid to overwinter? 27 Is it necessary to add a sulfuric acid metering pump to the chlorine gas drying system? 28 Further exploration of the saltwater membrane method for removing sulfate ions 29 Consumption of concentrated sulfuric acid in the drying system 30 Sulfate ion content in the brine used in soda ash production! 31 What are the hazards of excessive chlorates and sulfate ions in the filtered brine supplied from the primary brine source? 32 What is the reason why both sodium sulfite and free chlorine are present in a batch of brine? 33 Discussion on sulfuric acid recovery issues. 34 The corrosiveness of sodium sulfite. 35 Can hydrogen peroxide be used as a substitute for sodium sulfite in dechlorination? 36 How to stably control the sulfate level in saline? 37 High sulfate levels and cooler weather. 38 Does that brother know what’s in the waste sulfuric acid after it has been purified? Just letting you know, thanks! 39 The sulfuric acid concentration and the pumping power of the Naïs pump. 40 Manufacturers that use membrane methods to remove sulfate ions. 41 Does the acid mist collector for chlorine gas remove ferric sulfate as one of the impurities? 42 How is the consumption of ion-exchange membrane caustic soda and concentrated sulfuric acid determined? 43 Experience with sulfuric acid heat exchangers 44 The circulation rate of sulfuric acid in chlorine pumps used for transporting chlorine 45 The problem of acid sludge in pipelines carrying concentrated sulfuric acid 46 How to separate sulfuric acid anhydride from sodium sulfate 47 The freezing point of a 10% sodium sulfite solution 48 The solubility product of calcium sulfate in saline solutions 49 What are the adverse effects of operating CEC electrolyzers at high sulfate levels? 50 Removing sodium sulfate crystal deposits inside pipe walls 51 Do you know what the particle size of the natural crystals of sodium carbonate and sodium sulfate is? First, thank you. Can the 52 sulfuric acid system be used for heating, and can sulfuric acid be used to dry the electrolyzed hydrogen? Why? 54. Material issues related to 5480% sulfuric acid storage tanks. 55. Instability of sulfate ions; contradictions in the data collected. 56. Sodium sulfite concentration. 57. Problems associated with the removal of sulfate ions. 58. Membrane-based technologies for removing sulfate ions. 59. Feasibility of using concentrated sulfuric acid for purifying acetylene. 60. Whether hydrogen reacts with concentrated sulfuric acid. 61. Issues related to sulfate ions in ion-exchange membrane-produced brackish water 62 Control temperature of sulfuric acid 63 Material of pipelines for dilute sulfuric acid 64 How sodium sulfate affects the pH of the anode solution 65 Effectiveness of membrane methods in removing sulfate ions 66 Removal of sulfate ions: comparison between membrane methods and barium methods 67 Difficulties in sulfur overflow in chlorine drying tower systems 68 Treatment of dilute sulfuric acid 69 How to calculate the water content in the gas produced after dehydrating concentrated sulfuric acid 70 Are there any companies that use sulfuric acid purification processes? 71 Should a vortex pump or a jet pump be used for sodium sulfite pumps? 72 The sulfate content in the solution. 73 The unit used for removing sulfates by the barium method; let’s share our experiences! 74. The price of hydrated barium sulfate in the process of brine purification. 75. Issues related to the recovery of concentrated sulfuric acid used in the chlor-alkali industry. 76. Can hydrogen and sulfuric acid react to produce explosive gases? 77. Solubility of sulfate ions. 78. Is it possible to carry out vacuum dechlorination of dilute brine without using sodium sulfite? 79. What are the differences between sulfite in removing free chlorine under acidic and alkaline conditions? 80. The impact of the quality of raw salt on sulfate ion control. 81. How to remove chlorine from waste sulfuric acid. 82. What is the role of 98% concentrated sulfuric acid in the chlor-alkali industry? 83. The effects of excessive sulfate ions in the brine fed into the reactor! 84 Regarding the sealing of leaks caused by concentrated sulfuric acid. 85 Is it necessary to provide heat tracing for 75% sulfuric acid? 86 Using sodium sulfite for dechlorination in brackish water. 87 Does anyone with more knowledge on the concentration of sulfuric acid know anything about this? I would appreciate some advice 88 Crystallization of sodium sulfate in wastewater 89 What is the circulation rate of dilute sulfuric acid in the integrated drying tower? 90 Sodium sulfite levels in brine are too high – how to remove it? 91 Material issues related to the plate exchangers used for dilute sulfuric acid in chlorine drying towers 92 Plate heat exchangers for concentrated sulfuric acid 93 Should sulfuric acid be added continuously during chlorine drying? 94 Why is concentrated sulfuric acid added to the acid mist trap for chlorine? 95 How to clean sulfuric acid heat exchangers 96 How does sulfate affect hydroxide discharge and self-discharge? 97 Chlorine-dried sulfuric acid mist eliminator; 98 Control of sulfuric acid concentration in concentrated sulfuric acid; 99 Concentrated sulfuric acid pipelines; 100 Process for removing sulfate ions in the production of mirabilite; 101 Sodium sulfate production process; 102 I’ve seen discussions on forums regarding the separation of a portion of brine to be used for removing sulfate ions – please advise. 103 Sodium sulfite addition point! 10498%l – Intimate contact between sulfuric acid and PVC fillers! 105 Graph of sulfuric acid crystallization temperature vs. concentration 106 Preventing freezing in sulfuric acid pipelines 107 Manufacturers of concentrated sulfuric acid pumps 108 Discussion on the concentration of sulfate ions inside electrolyzers 109 Reasons for the difference in sodium sulfate content entering and leaving the electrolyzer 110 Please discuss the feasibility and specific methods for recovering barium sulfate 111 What is the amount of sodium sulfite required? 112 Can sodium sulfite react with sodium chlorate under alkaline conditions? 113 The solubility of sodium sulfate in 30% caustic soda and 42% caustic soda. 114 Removing sulfate ions from seawater. Last edited by tfx511024 on 2009-2-19 14:26. ] # ， ， &