The indexes of the latest domestic polyethylene ca

2022-08-19
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The indicators of new domestic polyethylene catalyst reach the import level

the indicators of new domestic polyethylene catalyst reach the import level

November 16, 2016

[China paint information]

recently, the vapor phase polyethylene (PE) slurry catalyst (pge-101) independently developed by China Petroleum and Petrochemical Research Institute, In Jilin Petrochemical 274000 T/a linear low density polyethylene plant, the super condensed state was completed and then sent to the computer for data processing. Under the production conditions, the industrial promotion was carried out, and all indicators reached the level of imported catalysts

pge-101 realizes the stable operation of the device under the harsh conditions of supercondensation, stable process control, catalytic activity of more than 20000 times, and product bulk density of 0 39g/cm3。 Compared with similar catalysts at home and abroad, pge-101 has the characteristics of stable activity release, low content of fine powder in polymerization products, narrow particle size distribution, less confidence tablets for extruder enterprises, sensitive hydrogen regulation of catalyst, outstanding copolymerization performance, good polymer particle morphology, etc

through the combination of carrier surface modification and spray drying and other scientific means, the researchers of Daqing Chemical Research Center of Sinopec academy have overcome the core technical problems of particle morphology control in catalyst preparation. During the start-up and operation, the scientific researchers deeply understood the technical difficulties of the supercondensation operation, formulated the technical scheme, defined the catalyst quality index, and conducted 9 catalyst pilot tests in the most advanced gas-phase full density polyethylene pilot plant in China, which solved the technical problems such as long catalyst induction time, system fluid accumulation, fluidization retention, reactor agglomeration and so on in the fluidized bed reactor during the supercondensation operation

at present, the capacity of PetroChina's gas-phase polyethylene unit is 2.6 million tons/year, and 100 tons of slurry catalyst are required every year. However, this market is almost monopolized by foreign companies and a few domestic catalyst plants. The high price of imported catalysts, the Expert Committee on food contact materials drafted the "Industry Guide for strengthening the supply chain and declaration of conformity of food contact materials such as the midpoint to the point of the graph". The long purchase cycle and the poor stability of catalyst batches often cause the production of the device to fluctuate, there are many transitional materials, and the product quality is not up to standard

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