A device and method for improving coagulation effect of isoprene rubber

An isoprene rubber and agglomeration kettle technology, applied in the field of synthetic rubber, can solve the problems of high foam in the system, sticky glue, and high steam consumption in the coagulation unit, and achieves the advantages of eliminating the dead angle of stirring, reducing the surface tension and reducing the steam consumption. Effect

Active Publication Date: 2018-06-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above-mentioned patents have greatly improved the coagulation effect of isoprene rubber, reduced steam consumption, and extended the start-up cycle, but there are still problems such as high steam consumption in the coagulation unit, excessive foam in the system, and sticky glue on the liquid surface of the coagulation kettle. question

Method used

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  • A device and method for improving coagulation effect of isoprene rubber
  • A device and method for improving coagulation effect of isoprene rubber
  • A device and method for improving coagulation effect of isoprene rubber

Examples

Experimental program
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Effect test

Embodiment 1

[0059] The rare earth isoprene rubber hexane solution used is obtained by polymerizing isoprene with hexane as a solvent under the action of a rare earth catalyst. The rubber content is 12%, and the 1,4-cis content of rare earth isoprene rubber is 96%. The molecular weight distribution was 2.5, and the Mooney viscosity was 85. The specific operation steps are as follows:

[0060] Rare earth isoprene rubber is sprayed 3 into the coagulation kettle 1 through a dual-fluid nozzle. A ring of compressed air pipelines with holes are arranged on the inner wall of the first coagulation kettle and the second coagulation kettle. Each pipeline has 3 openings and 3 openings. The holes are evenly distributed on the annular compressed air pipeline, and the compressed air outlet is parallel to the wall of the coagulation kettle 1. The specific operating conditions are: the compressed air from the compressed air supply device and the rare earth isoprene rubber from the glue supply device are p...

Embodiment 2

[0062] Glue used is with embodiment 1, and concrete operation steps are as follows:

[0063] The rare earth isoprene rubber is sprayed 3 into the coagulation kettle 1 through a two-fluid nozzle. The first coagulation kettle and the inner wall of the first coagulation kettle are not equipped with a compressed air pipeline 2 with holes. The specific operating conditions are: the compressed air from the compressed air supply device And the rare earth isoprene rubber from the glue supply device is injected into the coagulation kettle 1 through the two-fluid nozzle 3, and the rare earth isoprene rubber injected into the coagulation kettle 1 through the two-fluid nozzle has a glue feeding speed of 1m 3 / h, the pressure of the compressed air injected into the dual-fluid nozzle 3 is 0.6MPa, the amount of release agent should be kept at 0.05kg / t glue, the temperature of the first coagulation tank is 83°C, the stirring speed is 280 rpm, the second The temperature of the coagulation kett...

Embodiment 3

[0065] Glue used is with embodiment 1, and concrete operation steps are as follows:

[0066] A ring of compressed air pipelines 2 with holes are arranged on the wall of the first condensation kettle and the second condensation kettle, and each pipeline 2 is provided with 6 compressed air outlets, and the 6 openings are evenly distributed on the ring-shaped compressed air pipeline 2 , the compressed air outlet is parallel to the wall of the coagulation kettle, and the specific operating conditions are: the compressed air from the compressed air supply device and the rare earth isoprene rubber from the glue supply device are injected into the coagulation kettle through the two-fluid nozzle 3, and at the same time, the The compressed air line 2 is injected with compressed air, and the rare earth isoprene rubber injected into the coagulation kettle through a two-fluid nozzle is fed at a speed of 1m 3 / h, the pressure of the compressed air injected into the dual-fluid nozzle 3 and ...

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Abstract

The present invention provides an apparatus and a method for improving the agglomeration effect of a polyisoprene rubber. The apparatus comprises: a pipeline provided with a plurality opening holes and annularly arranged around the circumferential direction of the inner wall of an agglomeration kettle, wherein the gas inlet of the pipeline is connected to a compressed air supply device; and a double-fluid injection system, wherein the double-fluid injection system comprises a double-fluid nozzle, the compressed air supply device connected to the double-fluid nozzle, and a glue liquid supply device connected to the double-fluid nozzle, and the compressed air from the compressed air supply device and the glue liquid from the glue liquid supply device are injected into the agglomeration kettle through the double-fluid nozzle.

Description

technical field [0001] The invention relates to the field of synthetic rubber, in particular to a method and device for improving the coagulation effect of isoprene rubber by using compressed air. Through the improvement of the coagulation device and the use of compressed air, steam consumption is reduced and the start-up period of the isoprene rubber coagulation unit is prolonged. Background technique [0002] Isoprene rubber (cis-1,4-polyisoprene rubber) is a high-cis (cis-1,4 content of 95% to 98%) synthesized from isoprene, and its structure and properties are similar to natural rubber. , known as synthetic natural rubber, whose full name is cis-1,4-polyisoprene, can replace natural rubber in truck tires and off-road tires, and can also be used in medicine and other fields. [0003] The current industrialized isoprene rubber technology is the solution polymerization method. In addition to about 10% rubber, the glue solution synthesized in the polymerization section of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C2/06
Inventor 宋尚德张桂荣黄文涛杨俊峰兰明赵彦强杨金胜田晓军肖翠
Owner PETROCHINA CO LTD
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