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Liquid phase-gas phase combined olefin continuous polymerization method and device

A technology of liquid-phase polymerization and gas-phase polymerization, applied in the field of olefin polymerization, which can solve the problems of small investment and inability to produce impact copolymers

Pending Publication Date: 2020-09-15
北京鑫美格工程设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this process is small investment, but the disadvantage is that it can only produce polypropylene homopolymer and random copolymer, and cannot produce impact copolymer
[0010] It can be seen that each process has its advantages and disadvantages, and there is still a lot of room for development in terms of process.

Method used

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  • Liquid phase-gas phase combined olefin continuous polymerization method and device
  • Liquid phase-gas phase combined olefin continuous polymerization method and device
  • Liquid phase-gas phase combined olefin continuous polymerization method and device

Examples

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preparation example Construction

[0163] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.

[0164] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples can be obtained from commercial sources unless otherwise specified.

[0165] In the description of the present invention, it should be noted that the terms "first", "second" and so on are only used for descriptive purposes, and do not indicate or imply relative importance.

[0166] Optional means that the feature exi...

Embodiment 1

[0167] The preparation of embodiment 1 propylene homopolymer

[0168] pre-polymerization. Liquid phase propylene, Ziegler-Natta catalyst white oil slurry containing 30wt% (such as the CS-1 of Yingkou Sunny Catalyst Co., Ltd.), triethylaluminum and cyclohexylmethyldimethoxysilane are all directly input into the prepolymerization tank Polymerization slurry is formed in R101. The temperature of prepolymerization tank R101 is 35° C., and the material residence time is 4 minutes. Propylene prepolymerization is carried out. The polymerization ratio of polypropylene in the obtained raw material slurry (ie, catalyst activity gPP / g catalyst) is 50 times.

[0169] Liquid phase bulk polymerization. The raw material slurry obtained from the prepolymerization tank R101 is averagely input into the first liquid phase polymerization reactor R201 and the second liquid phase polymerization reactor R202 through the three-way valve, and the liquid phase propylene and hydrogen are mixed and the l...

Embodiment 2

[0173] The preparation of embodiment 2 wide distribution propylene homopolymer

[0174]pre-polymerization. With embodiment 1.

[0175] Liquid phase bulk polymerization. The raw material slurry obtained from the prepolymerization tank R101 is input into the first liquid phase polymerization reactor R201, and the liquid phase propylene and hydrogen are mixed and the liquid phase polymerization raw materials are input into the first liquid phase polymerization reactor R201 (wherein the liquid phase propylene addition amount is recovered It is about 25wt% of the new liquid phase propylene, the amount of hydrogen added is 0.08kg / 1000kg propylene), the temperature of the first liquid phase polymerization reactor R201 is controlled at 68°C, and the liquid phase homopolymerization of propylene is carried out, and the material level in the reactor is 40 -50% by volume, stay for 40 minutes; the material of the first liquid phase polymerization reactor R201 is input into the second liq...

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Abstract

The invention provides a liquid phase-gas phase combined olefin continuous polymerization method and device. The device comprises a catalyst feeding system, an olefin feeding system, a hydrogen feeding system and a polymerization reaction system, wherein the catalyst feeding system, the olefin feeding system and the hydrogen feeding system are respectively connected with the polymerization reaction system. The method is particularly suitable for the production of olefin homopolymers and copolymers such as olefin homopolymers, olefin random copolymers and olefin impact copolymers (for example,propylene homopolymers, propylene random copolymers and propylene impact copolymers can be produced). The polymerization reaction kettle has flexible combination and can be formed according to the requirements of different products so as to produce different types of products, and the production of middle-end and low-end products has short flow and low cost; and and high-end products can be produced, and the quality is high.

Description

technical field [0001] The invention relates to a liquid phase-gas phase combination continuous polymerization method and device for olefins, in particular to a liquid phase-gas phase combination continuous polymerization method and device for propylene homopolymerization and propylene copolymerization, and belongs to the technical field of olefin polymerization. Background technique [0002] Polypropylene is cheap, excellent in performance, easy to process and shape, and has a very broad application field. It is the second largest synthetic resin after polyethylene. Polypropylene is polymerized from propylene as a monomer, or through the copolymerization of propylene and a small amount of other olefin monomers. [0003] Generally, polypropylene is produced by catalyzing the polymerization of propylene monomer or comonomer by a catalyst. The polymerization reaction can be either batch or continuous. The continuous method has lower production cost and better product performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/02C08F2/34C08F2/01C08F10/00C08F110/06C08F210/16C08F210/06
CPCC08F2/01C08F2/02C08F2/34C08F10/00C08F110/06C08F210/06C08F210/16
Inventor 刘立新李化毅张毅
Owner 北京鑫美格工程设计有限公司