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Method and device for supercritical CO2 assisted preparation of regenerated rubber

A supercritical, CO2 technology, applied in the direction of bulk chemical production, plastic recycling, recycling technology, etc., can solve the problems of slow speed, incomplete depolymerization of recycled waste rubber, etc., and achieve the effect of wide application range

Inactive Publication Date: 2012-07-25
CHINA RUBBER RESOURCE REGENERATION QINGDAO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No shearing action was applied during the reaction, the speed was slow, and the depolymerization of recycled waste rubber was not complete

Method used

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  • Method and device for supercritical CO2 assisted preparation of regenerated rubber
  • Method and device for supercritical CO2 assisted preparation of regenerated rubber
  • Method and device for supercritical CO2 assisted preparation of regenerated rubber

Examples

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Embodiment Construction

[0045] A certain amount of waste rubber powder is placed in the high-pressure shearing chamber 7 in which softeners and desulfurizers have been placed, or a pre-mixed softener, desulfurizing agent and other aids can be placed in the high-pressure shearing chamber 7. Of waste rubber powder, at a certain temperature, supercritical CO 2 Under the action of pressure and shear rate, the waste rubber powder is repeatedly squeezed, meshed, and sheared between the shearing elements 10, and then a certain pressure release rate can be obtained through the rapid pressure relief valve 12, and the rubber powder expands to obtain regenerated rubber; or At a certain temperature, supercritical CO 2 Under the action of pressure and shear rate, the waste rubber powder is repeatedly squeezed, meshed and sheared between the shearing elements 10, and then a certain pressure release rate can be obtained through the rapid pressure release valve 12, the rubber powder expands, and the supercritical CO 2 ...

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Abstract

The invention relates to a method and a device for supercritical CO2 assisted preparation of regenerated rubber. In the method, supercritical CO2 is introduced into a chamber with a shearing meshing device, and permeation and swelling effect of a supercritical fluid are utilized, so as to help a desulfurizing agent spreading under the effects of extrusion and shearing to enter the inside of waste rubber powder so that the cross-linked network of the waste rubber powder is broken, thereby realizing the regeneration and utilization of the waste rubber powder. By utilizing the method, the time of entering a regeneration softener into the inside of the waste rubber powder can be greatly shortened, the time of regeneration and desulfurization is shortened and the temperature, supercritical CO2 pressure, shearing strength in the processing process can be independently regulated; by utilizing the method, the regenerated rubbers of the waste rubber powder, which have different types and different properties, can be prepared; and the prepared regenerated rubber has the advantages of strong material adaptability, stable product property and the like, and is environment-friendly.

Description

Technical field [0001] The invention relates to the field of rubber recycling applications, a high-efficiency, environmental-friendly and safe regeneration method for the regeneration processing and utilization of waste rubber powder and its realization device. Background technique [0002] At present, the continuous increase of waste rubber products, especially automobile tires, poses a serious threat to the environment. With the increasing environmental pollution, the lack of energy and the public's continuous attention to the environment and sustainable development, countries all over the world are actively looking for rubber Source of raw materials and substitute materials. Therefore, the recycling of waste rubber products, especially waste tires, has become one of the most important issues in the rubber industry, and rubber regeneration has gradually become an important way for the recycling of waste rubber products. [0003] The regeneration of waste rubber refers to the use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/16C08L17/00
CPCY02P20/54Y02W30/62
Inventor 高长云辛振祥赵冬梅陈秀霞谭钦艳冷秀江
Owner CHINA RUBBER RESOURCE REGENERATION QINGDAO
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