I kindly ask people in the industry to introduce the current polypropylene processes of various domestic refineries!

The 300,000 tons/year polypropylene unit of Daqing Refining and Chemical Polypropylene Plant adopts BASELL's second-generation double-loop pipe advanced technology. The products produced by this process account for about 65% of the current world polypropylene product market. This equipment can produce 103 brands of products in three categories, outstanding ones include high-rigidity injection plastics, car bumper materials with good impact resistance, PP-R pipe materials, etc., which can completely replace imported products. To expand the chemical industry, we need to take advantage of Daqing's heavy oil cracking, adopt heavy to light technology, fully tap propylene resources, and use combined technologies such as OCP (olefin cracking process), CPP (catalytic thermal cracking process), LPR (low pressure recovery process), etc. to increase the polypropylene production capacity to 1 million tons per year and become the world's largest polypropylene production base.

Thank you upstairs. What kind of technology is new in Tianjin?

　At present, polypropylene (PP) is mainly produced by gas phase and bulk processes. The global growth of gas phase and bulk loop process resins is strongly challenging the products of slurry processes. Since the 1990s, the slurry process has been gradually eliminated. Among the global PP production processes, Basell's Spheripol loop/gas phase process dominates. This process currently accounts for 50% of global PP production. ； Followed by DOW Company's Unipol gas phase process, BP Company's Innovene gas phase process, NTH Company's Novolen gas phase process, Mitsui Company's Hypol kettle body process, Borealis Company's Borstar loop/gas phase process, etc. In recent years, the proportion of gas phase and bulk processes has increased year by year, and PP plants under construction and newly built around the world will basically use gas phase and bulk processes. In particular, the rapid increase in gas phase processes is challenging the Spheripol process, which ranks first in the world. According to NTH Company, since 1997, 55% of the new licensed PP capacity worldwide has adopted the Novolen gas phase process, and the gas phase process will gradually increase in the future. In addition to the above main PP production processes, the original Montell company successfully developed reactor PP alloy Catalloy and Hivalloy technologies in the 1990s. The successful development of these two technologies has created conditions for the high performance and functionalization of PP resin and its entry into high value-added applications, and both have now been industrialized. In addition, Basell Company, Borealis Company, etc. have also made breakthroughs in new polypropylene technologies. (1) Mitsui Petrochemical's Hypol process. The Hypol process adopts a kettle-type liquid phase bulk-gas phase combination process technology and uses TK-Ⅱ high-efficiency carrier catalyst. The catalyst activity is >20,000 gPP/gcat, and it does not remove ash or random objects. The isotacticity of PP is ≥98%, the particle size distribution is narrow, and a wide range of PP can be produced. The Hypol polypropylene process was first put into production in 1984 on two 40,000 tons/year production lines at the Chiba plant. There are 23 production devices and devices under construction using this process in the world, with a total production capacity of 2 million tons per year. The polypropylene products produced by this process have many varieties, complete grades, high whiteness, good optical properties, low volatility and ash content, and excellent product quality, and can meet all quality requirements without further processing. my country's Yangzi Petrochemical, Panjin Ethylene, Luoyang Petrochemical, and Guangzhou Petrochemical all have this process equipment. (2) Haymont's Spheripol process. The Spheripol process adopts loop liquid phase bulk-gas phase combined process technology and uses 10 types of high-efficiency carrier catalysts such as GF-2A, FT-4S, and UCD-104. The catalyst activity reaches 40,000 gpp/gcat, and the product isotacticity is 90%-99%, and it does not remove ash or random objects. This process uses new catalysts and new additive addition technologies to develop granulation-free Spheripol process technology. Compared with conventional production processes, equipment investment is reduced by 50%, energy consumption is reduced by 85%, and maintenance costs are reduced by 80%. The Spheripol process can produce a wide range of PP products, including homopolymers, random copolymers, terpolymers, multiphase impact copolymers and high impact copolymers with an ethylene content greater than 25%. The catalyst particle size of the Spheripol process is large, round and uniform, so the polymer particles produced are large, granular-shaped, and have a narrow particle size distribution. In addition, the material flow rate in the loop reactor is high, and the generated powder has a high apparent density and a smooth surface, and is not easily blown away by the air flow, creating conditions for the application of dense-phase fluidized bed reactors. There are 43 production units using this technology around the world, with a total production capacity of more than 6 million tons/year, including units under construction with a total production capacity of >10 million tons/year. Our country's Qilu Petrochemical, Shanghai Petrochemical, Wushun Ethylene, Maoming Petrochemical, Tianjin Lianhua, Zhongyuan, Dushanshan, Dalian, Huabei Oilfield, Daqing Refining and Chemical and other units all use this process for production. (3) Union Carbide’s Unipol process. The Unipol gas-phase fluidized bed process uses Shell's SHAC high-efficiency catalyst, with a catalyst activity of 20,000-25,000 gpp/gcat. The process of catalyst purification, deashing and random removal is omitted, the process flow is short, no waste liquid is discharged, and the pp isotacticity can reach 99%. This process is simple, economical and flexible, but has poor production stability and irregular product shapes. The total production capacity of production equipment and equipment under construction using this technology around the world has increased to 5 million tons/year, second only to the Spheripol process, and the maximum single-line production capacity can reach 320,000 tons/year. (4) Amoco gas phase process. The Amoco gas phase process uses a horizontal stirred bed gas phase reactor with a reactor volume of up to 79 m2. The paddle stirring makes the material flow in the form of plug flow, and the product switching is fast. The heat of polymerization reaction is removed by evaporation of propylene. It uses an ultra-high activity carrier titanium spherical catalyst with a catalyst activity of 40,000 gpp/gcat and a PP isoform of 99%. The production process does not remove ash or random objects. It can produce homopolymers and random copolymers, as well as copolymers with high rigidity and high impact strength. The product quality is good and the production cost is low. Due to the use of paddle mixing, the material flows in the form of plug flow and does not require large circulation. Therefore, it consumes less power, does not require steam, and is reliable in operation. (5) BASF’s Novolen gas phase process. The Novolen gas-phase process adopts a vertical double-spiral stirred reactor. The material flows in a turbulent state and the catalyst is evenly dispersed in the powder bed. The first reactor produces homopolymers and random copolymers, and the second reactor produces impact copolymers. Because it adopts the form of stirring and mixing, the residence time of the materials in the polymerization tank is difficult to control evenly, which makes the molecular weight of the product wider, the Ti, C1 ions and ash content in the product increase, and the catalyst activity is low. The advantages of this process are short process and low investment. After switching to high-activity catalysts in 1990, dechlorination treatment was omitted and production capacity was increased. The maximum single-line production capacity is 250,000 tons/year. The total production capacity of the world using this technology has reached 3.8 million tons/year.

It is said to be Basell’s most advanced Spherizone technology

It is said that the new product in Tianjin is Spherizone. Fujian is Novolen