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A method for initiating a polymerization reaction

A technology of polymerization reaction and polymerization reactor, which is applied in the field of initiation of solution method ethylene propylene rubber polymerization reaction, can solve the problems of reaction efficiency reduction, catalyst poisoning, etc., achieve stable production and operation, and solve the effect of catalyst activity reduction

Active Publication Date: 2018-11-27
中石油吉林化工工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem in the prior art that steam enters the reaction system due to leakage of the heat exchange tube, causing the catalyst to be poisoned and the reaction efficiency to be reduced, the present invention provides a method for initiating a polymerization reaction, which includes: using a heat tracing tube to trace the heat of the polymerization reactor, Wherein, the heat tracing pipe is arranged on the side wall and the bottom of the polymerization reactor in a winding manner

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The polymerization reactor is traced externally with a heat tracing pipe with a pipe diameter of 1 / 2 inch, and the heat tracing pipe is arranged on the side wall and the bottom of the polymerization reactor in a winding manner. The volume of the polymerization reactor is 30 cubic meters, and the number of heat tracing pipes is 8. 2barg saturated steam is introduced into the heat tracing pipe, the distance between adjacent heat tracing pipes is 50mm, the flow rate of steam in the heat tracing pipe is 5m / s, the temperature of the material in the polymerization reactor rises by 30°C, and the polymerization reaction caused by each start-up Time control is 5 hours.

Embodiment 2

[0021] The polymerization reactor is traced externally with a heat tracing pipe with a pipe diameter of 11 / 2 inches, and the heat tracing pipe is arranged on the side wall and the bottom of the polymerization reactor in a winding manner. The volume of the polymerization reactor is 100 cubic meters, and the number of heat tracing pipes is 2. 9barg saturated steam is introduced into the heat tracing pipe, the distance between adjacent heat tracing pipes is 300mm, the flow rate of steam in the heat tracing pipe is 30m / s, the temperature of the material in the polymerization reactor rises by 80°C, and the polymerization reaction caused by each start-up Time control is 0.5 hours.

Embodiment 3

[0023] The polymerization reactor is traced externally with a heat tracing pipe with a pipe diameter of 3 / 4 inch, and the heat tracing pipe is arranged on the side wall and the bottom of the polymerization reactor in a winding manner. The volume of the polymerization reactor is 80 cubic meters, and the number of heat tracing pipes is 5. 7barg saturated steam is fed into the heat tracing pipe, the distance between adjacent heat tracing pipes is 100mm, the flow rate of steam in the heat tracing pipe is 25m / s, the temperature of the material in the polymerization reactor rises by 50°C, and the polymerization reaction caused by each start-up Time control is 3.5 hours.

[0024] The polymerization initiation method used in Examples 1 to 3 of the present invention avoids the introduction of water into the polymerization reaction system, makes the production and operation of the traditional solution method ethylene-propylene rubber device stable, and solves the catalyst activity cause...

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Abstract

The invention provides a polymerization reaction initiating method. The method includes the step of carrying out heat tracing on a polymerization reactor through a heat tracing pipe, wherein the heat tracing pipe is arranged outside the polymerization reactor in a wound mode. By means of the polymerization reaction initiating method, it is avoided that moisture is carried into a polymerization reaction system, so that production operation of a traditional solution method ethylene propylene rubber device is stable, and the problem that due to leakage of a shell-and-tube heat exchanger, catalyst activity is reduced or production is interpreted is solved.

Description

technical field [0001] The invention belongs to the technical field of rubber production, and in particular relates to a method for initiating polymerization reaction of ethylene-propylene rubber in a solution method. Background technique [0002] The traditional solution method ethylene propylene rubber production technology is still the main technology for domestic ethylene propylene rubber production because of its wide variety of products, stable operation, uniform quality, low ash content, and good product comprehensive performance. Ethylene, propylene, and the third monomer are polymerized in a polymerization reactor with n-hexane as a solvent under the action of vanadium and aluminum catalysts to form ethylene-propylene rubber. It is strictly forbidden to bring water into the polymerization reaction system during production, otherwise the catalyst will be poisoned. [0003] The polymerization reaction is an exothermic reaction, but the polymerization system needs to b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/16C08F2/01C08F2/06
CPCC08F2/01C08F2/06C08F210/16
Inventor 王立恒陶琳王翠菊王婷婷沈健
Owner 中石油吉林化工工程有限公司