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Anti-impact co-polypropylene production method

A technology of impact copolymerization and production method, which is applied in the field of polypropylene production, can solve the problems of increased production cost of impact materials, inability to recycle propylene, environmental pollution, etc., reduce the probability of full-line shutdown, reduce production risks, and improve production efficiency. The effect of the balance of impact resistance and rigidity

Inactive Publication Date: 2017-05-31
联泓新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] When the reactor system produces impact-resistant polypropylene, the ethylene concentration in the propylene recovered by the tail gas system must be less than 100ppm, otherwise the No. 1 reactor has a great risk of joint agglomeration. Most of the propylene is disposed of by fire-proof torch combustion. On the one hand, it causes environmental pollution, and on the other hand, a large amount of propylene cannot be recycled, which increases the production cost of impact materials (about 5t / h at 25t / h)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Adopt the production method of described impact copolymerization polypropylene to produce PPC-M100, comprise the following steps:

[0028] (1) Purification and supply of propylene raw materials; (2) Polymerization of propylene; (3) Degassing of resin; (4) Recovery of tail gas; (5) Granulation; (6) Air delivery and packaging; 2) The propylene polymerization reaction is divided into the first reaction system and the second reaction system, wherein the first reaction system includes the first reactor, the first feeding system and the reaction suppression system, and the second reaction system includes the second reactor and the second Feeding system; the first feeding system is connected with the second reactor through a material transfer system; the propylene polymerization reaction is specifically as follows:

[0029] a. Establish the cycle between the first reaction system and the second reaction system: first use nitrogen to boost the pressure of the second reactor to ...

Embodiment 2

[0044] Adopt the production method of described impact copolymerization polypropylene to produce PPC-M120, comprise the following steps:

[0045] (1) Purification and supply of propylene raw materials; (2) Polymerization of propylene; (3) Degassing of resin; (4) Recovery of tail gas; (5) Granulation; (6) Air delivery and packaging; 2) The propylene polymerization reaction is divided into the first reaction system and the second reaction system, wherein the first reaction system includes the first reactor, the first feeding system and the reaction suppression system, and the second reaction system includes the second reactor and the second Feeding system; the first feeding system is connected with the second reactor through a material transfer system; the propylene polymerization reaction is specifically as follows:

[0046] a. Establish the cycle between the first reaction system and the second reaction system: first use nitrogen to boost the pressure of the second reactor to ...

Embodiment 3

[0061] Adopt the production method of described impact copolymerization polypropylene to produce PPC-M180, comprise the following steps:

[0062] (1) Purification and supply of propylene raw materials; (2) Polymerization of propylene; (3) Degassing of resin; (4) Recovery of tail gas; (5) Granulation; (6) Air delivery and packaging; 2) The propylene polymerization reaction is divided into the first reaction system and the second reaction system, wherein the first reaction system includes the first reactor, the first feeding system and the reaction suppression system, and the second reaction system includes the second reactor and the second Feeding system; the first feeding system is connected with the second reactor through a material transfer system; the propylene polymerization reaction is specifically as follows:

[0063] a. Establish the cycle between the first reaction system and the second reaction system: first use nitrogen to boost the pressure of the second reactor to ...

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Abstract

The invention belongs to the technical field of polypropylene production, and particularly relates to an anti-impact co-polypropylene production method. The anti-impact co-polypropylene production method comprises the following steps of: (1) purifying and supplying a propylene raw material; (2) carrying out propylene polymerization reaction; (3) carrying out resin degassing; (4) recycling tail gases; (5) granulating; and (6) conveying air and packaging. An anti-impact co-polypropylene product obtained by the anti-impact co-polypropylene production method has very good impact resistance and rigidity balance.

Description

technical field [0001] The invention belongs to the technical field of polypropylene production, and in particular relates to a production method of impact copolymerized polypropylene. Background technique [0002] As early as the early 1990s, some polypropylene manufacturers successfully developed a melt flow rate of 30-40g / 10min [0003] block copolymerized polypropylene products. With the development of catalyst, production process technology and supporting technology, the development and production of high fluidity copolymerized polypropylene has become a new development trend. [0004] Due to the relatively high regularity of molecular structure, homopolypropylene has poor impact resistance at low temperature. The low temperature toughness of polypropylene can be improved by blending with elastomer or copolymerizing with a certain amount of ethylene. The most economical method is to homopolymerize propylene and then copolymerize with ethylene to form ethylene-propyle...

Claims

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Application Information

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IPC IPC(8): C08F210/16C08F210/02C08F2/01
CPCC08F210/16C08F210/06C08F2400/02C08F2/01C08F210/02
Inventor 叶青刘沛义张宪礼董世伟蒋兴迪
Owner 联泓新材料科技股份有限公司