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Three-kettle condensation method used in solution polymerization production of synthetic rubber

A technology of synthetic rubber and coagulation method, which is applied in the field of synthetic rubber production, can solve the problems of high steam consumption and high residual solvent content, achieve the effects of strengthening heat transfer and mass transfer process, prolonging coagulation residence time, and reducing steam consumption

Inactive Publication Date: 2012-06-27
广东鲁众华新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the above two-pot coagulation process and provide a three-pot coagulation method in the production of synthetic rubber by solution polymerization to solve the problems of high steam consumption and high residual solvent content in the coagulation process

Method used

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  • Three-kettle condensation method used in solution polymerization production of synthetic rubber
  • Three-kettle condensation method used in solution polymerization production of synthetic rubber

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Such as figure 1 As shown, after the polymerization reaction, the glue with a glue content of 10% is sent to the coagulation process, and is fully mixed with the recycled hot water and dispersant through the ternary premixer 1 to form a heterogeneous mixture. The temperature is 85°C, the flow ratio of hot water to glue is 2, and the content of dispersant in the mixture is 20ppm.

[0021] Then it is sprayed into the coagulation first kettle 8 through the glue nozzle, the steam is injected from the bottom of the first coagulation kettle 8, and the circulating hot water enters from the middle of the first kettle to keep the liquid level stable. Under the stirring action of the glue, steam and hot water, the glue Fully heat and mass transfer with hot water and steam, the glue liquid is rapidly dispersed, and the vapor phase entrained with solvent enters the condenser 2 from the top of the kettle, and enters the oil-water stratification tank 4 after being condensed by the co...

Embodiment 2

[0027] Such as figure 1 As shown, the glue solution with a glue content of 20% after the polymerization reaction is sent to the coagulation process, and is fully mixed with the recycled hot water and dispersant through the ternary premixer 1 to form a heterogeneous mixture, wherein the hot water The temperature is 98°C, the flow ratio of hot water to glue is 4, and the content of dispersant in the mixture is 20ppm.

[0028] Then it is sprayed into the coagulation first kettle 8 through the glue nozzle, the steam is injected from the bottom of the first coagulation kettle 8, and the circulating hot water enters from the middle of the first kettle to keep the liquid level stable. Under the stirring action of the glue, steam and hot water, the glue Fully heat and mass transfer with hot water and steam, the glue liquid is rapidly dispersed, and the vapor phase entrained with solvent enters the condenser 2 from the top of the kettle, and enters the oil-water stratification tank 4 a...

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Abstract

The invention provides a three-kettle condensation method used in solution polymerization production of synthetic rubber. The method comprises the following steps: a, fully mixing a rubber solution obtained after polymerization with cyclically used hot water and a dispersant so as to form a heterogeneous mixture; b, injecting the mixture into a primary condensation kettle, injecting steam from the bottom of the primary condensation kettle, allowing a vapor phase with a solvent to enter into a condenser from the top of the primary condensation kettle and to enter into an oil-water layering tank after condensation in the condenser, and after separation, allowing the solvent to enter into a refining system, condensed water to enter into a condensation system and the rubber solution to be condensed into rubber particles; c, sending the rubber particles and hot water in the primary condensation kettle to a secondary condensation kettle, injecting steam from the bottom of the secondary condensation kettle and allowing a vapor phase with a solvent to enter into the primary condensation kettle after pressurization; and d, sending the rubber particles and water in the secondary condensation kettle to a ternary condensation kettle, allowing a vapor phase with a solvent to enter into the primary condensation kettle after pressurization, sending the rubber particles to subsequent procedures and conveying hot water into the primary condensation kettle for cyclic utilization. The method greatly improves heat and mass transfer effects in the condensation process of the rubber solution, has the advantages of low consumption of steam, small residual of the solvent, uniform rubber particle size, etc., and has obvious economic benefits and substantial environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of synthetic rubber production, and relates to a three-pot coagulation method in the production process of solution polymerization synthetic rubber with good energy-saving and consumption-reducing effects. Background technique [0002] In the production of synthetic rubber by solution polymerization method, the polymerization process of the reaction monomer is completed in a large amount of solvent. Generally, the concentration of the reaction monomer is controlled between 5% and 20%. The solvent and unreacted monomers are removed by steam stripping in hot water, and the rubber is condensed into granules, and then transferred to the next process for dehydration and drying. [0003] The traditional water analysis coagulation process adopts double-tank coagulation technology. This method uses two coagulation kettles. The glue is sprayed into the first kettle, hot water enters from the top, and steam enters fro...

Claims

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Application Information

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IPC IPC(8): C08C2/00C08C2/02C08F6/06C08F6/10
Inventor 崔广军于俊伟胡中玉王锦昌晏小康
Owner 广东鲁众华新材料有限公司
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