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Method for Separation of Low Temperature Butyl Rubber from Slurry

A butyl rubber, low temperature technology, applied in the rubber field, can solve the problem of high energy consumption, achieve high purity, reduce energy consumption, and achieve good separation effect.

Active Publication Date: 2021-07-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a new low-temperature method for separating butyl rubber in a slurry in order to overcome the high energy consumption defect of the prior art when separating methyl chloride containing butyl rubber particles in a slurry

Method used

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  • Method for Separation of Low Temperature Butyl Rubber from Slurry

Examples

Experimental program
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Effect test

Embodiment 1

[0052] The temperature T of the slurry inside the slurry separator = -40°C. The nitrogen flow rate Q2=0.8 (L / min) that enters gas distributor; The nitrogen flow rate Q1=15 (L / min) at the top; At the bottom of the slurry separator, the liquid methyl chloride output Q3=4.3 (L / min); by The methyl chloride returns to the sampling port below the line to collect the separated liquid methyl chloride, and the volatile residue content S=0.01% by weight is measured.

Embodiment 2

[0054] The temperature T of the slurry inside the slurry separator = -50°C. The nitrogen flow rate Q2=1.5 (L / min) that enters gas distributor; The nitrogen flow rate Q1=12 (L / min) at the top; At the bottom of the slurry separator, the liquid methyl chloride output Q3=4.1 (L / min); by The methyl chloride returns to the sampling port below the line to collect the separated liquid methyl chloride, and the volatile residue content S=0.02% by weight is measured.

Embodiment 3

[0056] The temperature T of the slurry inside the slurry separator = -60°C. The nitrogen flow Q2=1.2 (L / min) that enters gas distributor; The nitrogen flow Q1=13 (L / min) of the top; In the slurry separator bottom liquid methyl chloride output Q3=4.0 (L / min); By The methyl chloride returns to the sampling port below the line to collect the separated liquid methyl chloride, and the volatile residue content S=0.04% by weight is measured.

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Abstract

The invention relates to the field of rubber, and discloses a method for separating low-temperature butyl rubber in a slurry, the method comprising: adding methyl chloride containing butyl rubber particles formed by a copolymerization reaction of isobutylene monomer and isoprene monomer to a slurry It is introduced into a slurry separator and separated by an air flotation method to obtain concentrated slurry and liquid methyl chloride respectively; wherein, the temperature of the separation is 5-70° C. higher than the temperature of the copolymerization reaction. The method for the separation of low-temperature butyl rubber in slurry provided by the invention can realize the separation of butyl rubber particles and solvent methyl chloride at a relatively low temperature, so that the separation method of the present invention has significant advantages compared with the separation method of the prior art Advantages of reducing energy consumption.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a method for separating low-temperature butyl rubber from pulp. Background technique [0002] Butyl rubber, referred to as IIR (Isobutylene Isoprene Rubber), has good chemical stability and thermal stability, and the most prominent is good air tightness and water tightness. Its air permeability is only 1 / 7 of that of natural rubber and 1 / 5 of that of styrene-butadiene rubber, while its permeability of steam is 1 / 200 of that of natural rubber and 1 / 140 of that of styrene-butadiene rubber. Therefore, butyl rubber is mainly used in the manufacture of various rubber products such as inner tubes, steam pipes, water tires, dam bottoms and gaskets. [0003] In 1943, Esso Chemical Company of the United States first realized the industrial production of butyl rubber. Since then, Canada, France, and the Soviet Union have successively realized the industrial production of butyl rubber. In the early...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F6/10C08F210/12C08F236/08
CPCC08F6/10C08F210/12C08F236/08
Inventor 钟林宋小飞王镭安婷婷
Owner CHINA PETROLEUM & CHEM CORP
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