The 200,000-ton/year polypropylene plant of Dalian Petrochemical Company was started and put into operation one month ago. The four major features of the process have made production advantages full.
The device is the second largest of its kind in China Petroleum Corporation. It uses the second-generation polypropylene technology from Basel, Italy, the world’s largest polypropylene producer. It is a liquid-phase macro-loop reaction process that consists of catalyst preparation, prepolymerization and Polymerization and other eight units, after the establishment of a small cycle, high pressure cycle, low pressure cycle and large cycle, the catalyst, the polymerization reaction to produce a polypropylene slurry, and then flash recovery and deactivation drying, through the extrusion granulation finally out Finished product.
The reactor unit has 1 prepolymerization reactor and 2 series loop reactors. The extrusion granulation unit has two fully automated orbital portable packaging palletizing lines. The catalyst system consists of titanium catalyst (solid) supported on magnesium chloride, triethylaluminum (TEAL, liquid), electron donor (DONOR, liquid ) Three components, the prepolymerization is carried out in a small loop reactor and the liquid phase bulk polymerization to produce the homopolymer takes place in two serial loop reactors. Each reactor is protected by three measures: emergency polymerization inhibition, polymer from the bottom discharge and the upper bend of the reactor and the safety valve connected to the high pressure discharge.
The four major features of the process make it an advantage in production: with the fourth-generation catalyst system, bimodal polypropylene and products with high rigidity, high crystallinity, and high clarity can be produced; pressure levels for prepolymerization and polymerization reactions The increase can increase the content of hydrogen in the loop reactor, expand the range of MFR, increase the strength of the product, improve the performance of the product, and facilitate the control of morphology, isotacticity and molecular weight; and the double loop reactor structure. Based on the type, it can produce "bimodal" products with broad molecular weight distribution, and can also produce products with narrow molecular weight distribution; with the use of loop reactors and liquid-phase bulk polymerization, heat transfer can be controlled better and the reaction can be uniform. In addition, the use of metallocene catalysts also eliminates the need for significant retrofits to existing plants; reduced residence time, better utilization of reaction volume; improved polymer high and low pressure degassing, steaming, drying systems, and accidental discharge units; Increased efficiency and operational flexibility.
Dalian Petrochemical Company selects T30S and T36F grades with good production stability and marketable sales, and develops BOPP special materials with relatively good production performance based on the characteristics of the process technology. At present, the company has a crude oil processing capacity of 20.5 million tons/year, a catalytic cracking capacity of 5.8 million tons/year and a propylene resource of nearly 280,000 tons/year. The number of polypropylene products has increased from 24 to 56 and can produce full-range and multi-products. The various products used, such as packaging, automotive plastic parts, and daily plastic products, are widely used in various fields of the national economy, greatly improving the company's concentration of propylene processing and its competitiveness in the chemical market, making refinery gases The chemical industry, where resources are raw materials, has reached a new level.
The device is the second largest of its kind in China Petroleum Corporation. It uses the second-generation polypropylene technology from Basel, Italy, the world’s largest polypropylene producer. It is a liquid-phase macro-loop reaction process that consists of catalyst preparation, prepolymerization and Polymerization and other eight units, after the establishment of a small cycle, high pressure cycle, low pressure cycle and large cycle, the catalyst, the polymerization reaction to produce a polypropylene slurry, and then flash recovery and deactivation drying, through the extrusion granulation finally out Finished product.
The reactor unit has 1 prepolymerization reactor and 2 series loop reactors. The extrusion granulation unit has two fully automated orbital portable packaging palletizing lines. The catalyst system consists of titanium catalyst (solid) supported on magnesium chloride, triethylaluminum (TEAL, liquid), electron donor (DONOR, liquid ) Three components, the prepolymerization is carried out in a small loop reactor and the liquid phase bulk polymerization to produce the homopolymer takes place in two serial loop reactors. Each reactor is protected by three measures: emergency polymerization inhibition, polymer from the bottom discharge and the upper bend of the reactor and the safety valve connected to the high pressure discharge.
The four major features of the process make it an advantage in production: with the fourth-generation catalyst system, bimodal polypropylene and products with high rigidity, high crystallinity, and high clarity can be produced; pressure levels for prepolymerization and polymerization reactions The increase can increase the content of hydrogen in the loop reactor, expand the range of MFR, increase the strength of the product, improve the performance of the product, and facilitate the control of morphology, isotacticity and molecular weight; and the double loop reactor structure. Based on the type, it can produce "bimodal" products with broad molecular weight distribution, and can also produce products with narrow molecular weight distribution; with the use of loop reactors and liquid-phase bulk polymerization, heat transfer can be controlled better and the reaction can be uniform. In addition, the use of metallocene catalysts also eliminates the need for significant retrofits to existing plants; reduced residence time, better utilization of reaction volume; improved polymer high and low pressure degassing, steaming, drying systems, and accidental discharge units; Increased efficiency and operational flexibility.
Dalian Petrochemical Company selects T30S and T36F grades with good production stability and marketable sales, and develops BOPP special materials with relatively good production performance based on the characteristics of the process technology. At present, the company has a crude oil processing capacity of 20.5 million tons/year, a catalytic cracking capacity of 5.8 million tons/year and a propylene resource of nearly 280,000 tons/year. The number of polypropylene products has increased from 24 to 56 and can produce full-range and multi-products. The various products used, such as packaging, automotive plastic parts, and daily plastic products, are widely used in various fields of the national economy, greatly improving the company's concentration of propylene processing and its competitiveness in the chemical market, making refinery gases The chemical industry, where resources are raw materials, has reached a new level.
Stretching Roller,Roll For Stamping Machine,Printing Machine Rubber Roller,Roller For Stamping Machine
Taixing Jinlong Rubber Rollers Co., Ltd. , https://www.txjinlongrubber.com