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Olefin polymerization process and application

A technology for olefin polymerization and polymerization reaction, which is applied in the field of olefin coordination polymerization, olefin polymerization process equipment and polyolefin field, and can solve the problems of unstable operation of catalyst feeding device, accidents, inaccurate measurement, etc.

Pending Publication Date: 2021-02-23
大航锦吾(天津)新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Since Ziegler and Natta won the Nobel Prize in 1963, the olefin coordination polymerization process and polymerization methods have been developed rapidly. For example, the olefin polymerization process includes loop polymerization process, slurry stirred tank polymerization process, and gas phase fluidized bed polymerization process. , bimodal supercritical process and polymerization method, etc., but the catalyst adding device and adding method associated with these polymerization processes and polymerization methods have not been well developed. Until now, the catalyst adding device and method still only use special pumps to send or Syringe feeding and other methods, the catalyst feeding device is unstable, the metering is inaccurate, and it is easy to cause the polymerization process to be unstable and cause accidents

Method used

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  • Olefin polymerization process and application
  • Olefin polymerization process and application
  • Olefin polymerization process and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] After the 300L catalyst storage tank was fully replaced with nitrogen, add 20kg of high-efficiency Ziegler-Natta catalyst (Ti, 3.3wt%) of magnesium chloride carrier in the storage tank at 30°C; add 100L Et at 30°C 3 Al hexane solution (1M), stirred for 0.5 hours, filled with ethylene pressure 0.15MPa, activated pre-polymerization for 20 minutes, filtered; added 80kg of white oil at 50°C, stirred for 2 hours; pressed the catalyst into the screw with nitrogen at 30°C Type surface renewal catalyst feeding device; at -30 ℃, the screw-propelled surface renewal catalyst feeding device sends the catalyst into the slurry polymerization reactor at a rate of 5g / min. The hydrogen pressure in the reactor is 0.1MPa, and the ethylene pressure is 0.8 MPa, polymerization temperature 80°C, continuous polymerization for 66.6 hours to obtain 600,000 kg of polyethylene. During the polymerization process, the catalyst feed is stable, the catalyst metering is accurate, and the polymerization...

Embodiment 2

[0053] After fully replacing the 2500L catalyst storage tank with nitrogen, add 50kg of high-efficiency Ziegler-Natta catalyst (Ti, 4.5wt%) supported by alkoxymagnesium into the storage tank at -50°C; add 1000L Et at 35°C 3 Al hexane solution (1M), stirred for 1.5 hours, filled with ethylene pressure 0.5MPa, activated pre-polymerization for 30 minutes, filtered; added 800kg of vaseline at 80°C, stirred for 3 hours; pressed the catalyst into the screw with argon at 30°C In the surface renewal catalyst feeding device; at 60°C, the screw pusher surface renewal catalyst feeding device sends the catalyst into the loop polymerization reactor at a rate of 1000g / min; the hydrogen pressure in the reactor is 0.01MPa, and the ethylene pressure is 2.2 MPa, polymerization temperature 70°C, continuous polymerization for 50 minutes to obtain 1,600,000 kg of polyethylene. During the polymerization process, the catalyst feed is stable, the catalyst metering is accurate, and the polymerization ...

Embodiment 3

[0055] After the 1000L catalyst storage tank was fully replaced with nitrogen, 50kg of Ziegler-Natta catalyst (Cr, 2.1wt%) supported by silica gel was added to the storage tank at 50°C; 500L Et 2 AlCl hexane solution (1.5M), stirred for 2.5 hours, filled with ethylene pressure 0.25MPa, activated pre-polymerization for 35 minutes, filtered; added 600kg of silicone oil at 30°C, stirred for 20 hours; pushed the catalyst into the screw with nitrogen at 30°C Type surface renewal catalyst feeding device; at 70 ° C, the screw-type surface renewal catalyst feeding device sends the catalyst into the gas-phase fluidized bed polymerization reactor at a rate of 200 g / min; the hydrogen pressure in the reactor is 0.2 MPa, and the ethylene pressure is It is 2.9MPa, the polymerization temperature is 70°C, and the continuous polymerization is 250min to obtain 300,000kg of polyethylene. During the polymerization process, the catalyst feed is stable, the catalyst metering is accurate, and the po...

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Abstract

The invention discloses an olefin polymerization process and application, belonging to the field of olefin coordination polymerization, olefin polymerization process devices and polyolefin. The invention aims to provide reaction devices for olefin coordination polymerization or alpha-olefin polymerization or copolymerization. The reaction devices for olefin coordination polymerization or alpha-olefin polymerization or copolymerization include various polymerization reaction process devices formed by assembling a screw push type surface renewal catalyst feeding device and various reactors, wherein the screw push type surface renewal catalyst feeding device can stably, continuously and accurately feed a catalyst into one polymerization reactor in a metered manner, and a polymerization reaction is stable.

Description

technical field [0001] The invention belongs to the fields of olefin coordination polymerization, olefin polymerization process equipment and polyolefin, and specifically relates to olefin polymers, olefin polymerization process equipment, olefin polymerization methods, applications of olefin polymerization process equipment, and applications of olefin polymerization methods. Background technique [0002] There are four kinds of polymerization processes and polymerization methods for synthesizing polyolefins through coordination polymerization, namely slurry polymerization, gas phase polymerization, solution polymerization and bimodal supercritical process. [0003] (1) Slurry polymerization process and polymerization method: Mix ethylene with aliphatic hydrocarbon solvent, and under the action of Ziegler-Natta type catalyst, the polymer product is suspended in the solvent to form a slurry polymerization system with low pressure and temperature. Slurry polymerization is the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/02C08F2/01C08F4/642C08F4/02C08F4/6592C08F210/16C08F210/02C08F212/08
CPCC08F110/02C08F210/16C08F210/02C08F4/642C08F4/022C08F4/02C08F4/025C08F2/01C08F4/65922C08F4/6428C08F212/08
Inventor 付锦鹏黄启谷李会东伍川袁定坤李思聪夏晓琪马威龙
Owner 大航锦吾(天津)新材料有限公司