Condensation method for styrene thermoplastic elastomer solution

A thermoplastic elastomer and styrene-based technology, which is applied in the field of coagulation of styrene-based thermoplastic elastomer solutions, to achieve the effect of ensuring coagulation effect, reducing environmental protection requirements, and reducing sewage discharge

Pending Publication Date: 2020-12-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional process design, the heat supply method of this process is the direct heat supply of water vapor. This route has a simple process and high heat utilization efficiency. The same amount of oily s

Method used

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  • Condensation method for styrene thermoplastic elastomer solution
  • Condensation method for styrene thermoplastic elastomer solution
  • Condensation method for styrene thermoplastic elastomer solution

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0057]Example 1

[0058]The coagulation process of this embodiment adopts the equal pressure temperature difference type, and the process flow chart is as followsfigure 1 As shown, the styrene-based thermoplastic elastomer solution PS (specifically, the styrene-butadiene-styrene block copolymer rubber solution, the solvent is cyclohexane, hereinafter referred to as glue) is sent to the glue heater E After the second heat exchange with the first steam condensate in -2, it is sent to the water glue mixer X-3 and mixed with the post-treatment circulating hot water A sent to obtain a heterogeneous mixture. The phase mixture is sent to the first coagulation tank R-1, the top gas phase WS passes through the first coagulation tank stripping gas filter X-1 and the condensation cooler, and then enters the oil-water layer tank for stratification; in addition, the post-treatment cycle The hot water B is sent to the circulating hot water heater E-1 for the first heat exchange with the part of the ...

Example Embodiment

[0061]Example 2

[0062]The post-treatment circulating hot water B / A is 0.15, other process conditions are the same as in Example 1, and the experimental results are shown in Table 1.

Example Embodiment

[0063]Example 3

[0064]The post-treatment circulating hot water B / A is 0.3, other process conditions are the same as in Example 1, and the experimental results are shown in Table 1.

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Abstract

The invention relates to the field of rubber product preparation, and discloses a condensation method for a styrene thermoplastic elastomer solution, which comprises the following steps of sequentially sending a heterogeneous mixture into a first condensation kettle and a second condensation kettle to remove a solvent. The post-treatment circulating hot water B and steam are subjected to first heat exchange to obtain superheated water and first steam condensate water, the superheated water is fed into a first condensation kettle from the bottom of the first condensation kettle, and the heterogeneous mixture is obtained by mixing the post-treatment circulating hot water A and a styrene thermoplastic elastomer solution. According to the method provided by the invention, steam does not completely enter the condensation kettle any more, but exchanges heat with part of circulating hot water, so that the circulating hot water is changed into superheated water to enter the condensation kettle, the condensation effect of the condensation kettle is ensured, meanwhile, the sewage discharge capacity is reduced, the environmental protection requirement is met, and the subsequent sewage treatment cost is reduced.

Description

technical field [0001] The invention relates to the field of rubber product preparation, in particular to a coagulation method for a styrene thermoplastic elastomer solution. Background technique [0002] The solvent removal process of the solution polymerization synthesis device adopts the condensation process of double-tank series water analysis method based on the principle of steam distillation and wet degassing. In the traditional process design, the heat supply method of this process is the direct heat supply of water vapor. This route has a simple process and high heat utilization efficiency. The same amount of oily sewage must be discharged from the system. The limitations of this process are increasingly reflected in today's increasingly stringent pollution discharge quantities and standards for chemical production equipment. Contents of the invention [0003] The purpose of the present invention is to improve the sewage discharge of the device. Under the premise...

Claims

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Application Information

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IPC IPC(8): C08F6/12C08L53/02
CPCC08F6/12C08L53/02
Inventor 徐林邰峰李巍张国娟
Owner CHINA PETROLEUM & CHEM CORP
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