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A synthetic rubber industrial production method and an industrial device for implementing the method

A production method and technology for synthesizing rubber, which are applied in chemical instruments and methods, feeding devices, chemical/physical processes, etc., can solve the problems of complex post-processing process, low feeding concentration, high energy consumption and material consumption, etc. The effect of equipment efficiency and utilization, reducing production costs, and improving conversion rate per pass

Active Publication Date: 2022-04-01
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the low feed concentration of monomers in the existing synthetic rubber solution or emulsion polymerization method, the synthetic rubber glue obtained by polymerization contains a large amount of solvent and water, which makes the post-treatment process complicated. At the same time, the existing condensed steam The extraction method needs to introduce a large amount of hot water, so that the colloidal particles need to be dehydrated after stripping, which leads to the problem of large energy consumption and material consumption. The present invention proposes a bulk polymerization with high conversion rate and high viscosity Industrial production process for preparing synthetic rubber

Method used

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  • A synthetic rubber industrial production method and an industrial device for implementing the method

Examples

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Effect test

Embodiment 1

[0032] Example 1 This example is to illustrate the preparation of high cis polybutadiene rubber by bulk polymerization of butadiene.

[0033] Industrial device: The pre-polymerization reactor is a tank reactor with stirring; the polymerization reactor is two parallel meshing self-cleaning reactors; the devolatilization reactor is two parallel twin-screw extruders; The device is two parallel twin-screw extruders.

[0034]Industrial production method: Polymerization grade butadiene (monomer purity>99.6%), rare earth catalyst, molecular weight regulator diisobutylaluminum hydride are sequentially injected into the kettle-type pre-polymerization treated with vacuum nitrogen anhydrous and oxygen-free through the metering device Reactor, the pre-polymerization temperature is 10°C, and the reaction time is 0.1 hour; then the material is transported to two parallel biaxial meshing self-cleaning reactors, the reaction temperature is controlled at 30°C, and the average residence time of...

Embodiment 2

[0035] Example 2 This example is to illustrate the preparation of high trans polyisoprene rubber by bulk polymerization of isoprene.

[0036] Industrial device: the pre-polymerization reactor is a tank reactor with stirring; the polymerization reactor is two meshing self-cleaning reactors connected in series; The device is a twin-screw extruder.

[0037] Industrial production method: inject polymerization-grade isoprene monomer (monomer purity>99.5%), titanium catalyst and molecular weight regulator hydrogen into the pre-polymerization reactor treated with vacuum nitrogen anhydrous and oxygen-free through a metering device, The prepolymerization temperature was -10°C, and the reaction was carried out. The reaction time of the prepolymerization reactor was controlled to be 2 hours. The material is transported to the biaxial meshing self-cleaning reactor, the reaction temperature of the first meshing self-cleaning reactor is controlled at 40°C, the reaction temperature of the ...

Embodiment 3

[0038] Example 3 This example is to illustrate the preparation of high trans-butadiene-isoprene copolymer rubber by bulk polymerization of isoprene and butadiene.

[0039] Industrial device: the pre-polymerization reactor is a tank reactor with stirring; the polymerization reactor is two meshing self-cleaning reactors connected in series; The device is a twin-screw extruder.

[0040] Industrial production method: polymerization grade isoprene and butadiene monomer (monomer purity>99.5%) according to isoprene:butadiene=90:10 (molar ratio), titanium tetrachloride type Zieg The Le-Natta catalyst and the molecular weight regulator hydrogen are sequentially injected into the kettle-type prepolymerization reactor treated with vacuum nitrogen anhydrous and oxygen free through the metering device, and the prepolymerization temperature is 0°C to carry out the reaction. Control the prepolymerization reaction time to be 1 hour. The material is transported to the biaxial meshing self-cl...

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Abstract

The invention relates to an industrial production method of synthetic rubber and a device for implementing the method. The production method is as follows: prepolymerize a predetermined amount of monomers, initiators and molecular weight regulators in a prepolymerization reactor, then react in an interlocking self-cleaning reactor for a certain period of time, and then remove untreated impurities through a devolatilization reactor. Reacting monomers, the product is packaged after extrusion devolatilization, granulation and drying. The production unit includes batching system, polymerization system, post-processing system and utility system. The method and device of the invention can be used in the preparation of traditional rubbers such as IR, BR, SBR, butyl rubber and the like.

Description

technical field [0001] The invention relates to a bulk polymerization production method of synthetic rubber in petrochemical industry, in particular to an industrial production method of bulk polymerization to prepare synthetic rubber and a device for implementing the method. Background technique [0002] Now the common synthetic rubber process, such as the polymerization process of BR, IR or SSBR, in order to solve the viscosity problem in the material transportation process during the polymerization process, most of them adopt solution polymerization, and the monomer feed concentration is usually lower than 20% or even lower. In this case, although the polymerization process after 100% conversion of the monomers will not be blocked due to the viscosity of the material, but in this way, the synthetic rubber glue obtained by polymerization will contain a large amount of solvent, which needs to go through the coagulation process The solvent and other volatile components are s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F136/06C08F136/08C08F236/08C08F236/06C08F236/10C08F212/08C08F210/12C08F2/38C08F2/01B01J19/18B01J4/00
CPCC08F136/06C08F136/08C08F236/08C08F236/10C08F210/12C08F2/38C08F2/01B01J19/18B01J4/001C08F236/06C08F212/08
Inventor 贺爱华邵华锋刘晨光
Owner QINGDAO UNIV OF SCI & TECH
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