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Method for regenerating waste rubber and device thereof

A waste rubber and reaction device technology, applied in the production of bulk chemicals, plastic recycling, recycling technology, etc., can solve the problems of poor mechanical properties of reclaimed rubber and low degree of disassociation of reclaimed rubber powder.

Active Publication Date: 2021-10-01
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the delinking degree of the reclaimed rubber powder obtained by this method is low, and the mechanical properties of the obtained reclaimed rubber are poor.

Method used

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  • Method for regenerating waste rubber and device thereof
  • Method for regenerating waste rubber and device thereof
  • Method for regenerating waste rubber and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] use figure 1 The shown device carries out the regeneration of waste rubber, and the method is as follows:

[0066] (1) Mix waste rubber powder (rubber powder is waste tire tread rubber powder, particle size is 10 mesh) with hexamethylenetetramine, lantana plant essential oil and activator 420 at 70°C, 50r / min Stirring and mixing for 40 minutes under certain conditions to obtain mixed rubber powder; the mass ratio of waste rubber powder, hexamethylenetetramine, lantana plant essential oil and activator 420 is 100:1.5:5:3.

[0067] (2) The mixed rubber powder is placed in the supercritical reaction device 1, the sealing valve 4 is closed, and gaseous carbon dioxide is introduced, and the density of the gaseous carbon dioxide is 0.4722g / cm 3 , the temperature in the supercritical reaction device 1 is raised to 80°C, the pressure is raised to 10MPa, the gaseous carbon dioxide is converted into a supercritical fluid, the stirring shafts 1-5 are turned on, and the swelling t...

Embodiment 2

[0070] use figure 1 The shown device carries out the regeneration of waste rubber, and the method is as follows:

[0071] (1) Mix waste rubber powder (waste rubber powder is waste tire rubber powder with a particle size of 20 mesh) with hexamethylenetetramine, lantana plant essential oil and activator 480 at 60°C and 40r / min Stirring and mixing for 30 minutes under certain conditions to obtain mixed rubber powder; the mass ratio of waste rubber rubber powder, hexamethylenetetramine, lantana plant essential oil and activator 420 is 100:2:6:2.5.

[0072] (2) The mixed rubber powder is placed in the supercritical reaction device 1, the sealing valve 4 is closed, and gaseous carbon dioxide is introduced, and the density of the gaseous carbon dioxide is 0.48g / cm 3 , the temperature in the supercritical reaction device 1 is raised to 60°C, the pressure is raised to 12MPa, the gaseous carbon dioxide is converted into a supercritical fluid, the stirring shafts 1-5 are turned on, and ...

Embodiment 3

[0075] use figure 1 The shown device carries out the regeneration of waste rubber, and the method is as follows:

[0076](1) Put waste rubber powder (rubber powder is natural rubber vulcanizate, particle size is 10 mesh) with hexamethylenetetramine, lantana plant essential oil and activator 520 under the conditions of 80°C and 60r / min Stir and mix for 60 minutes to obtain mixed rubber powder; the mass ratio of waste rubber rubber powder, hexamethylenetetramine, lantana plant essential oil and activator 420 is 100:3:5.5:2.

[0077] (2) The mixed rubber powder is placed in the supercritical reaction device 1, the sealing valve 4 is closed, and gaseous carbon dioxide is introduced, and the density of the gaseous carbon dioxide is 0.55g / cm 3 , the temperature in the supercritical reaction device 1 is raised to 100°C, the pressure is raised to 8MPa, the gaseous carbon dioxide is converted into a supercritical fluid, the stirring shafts 1-5 are turned on, and the swelling treatment...

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Abstract

The invention provides a method for regenerating waste rubber and a device thereof, and belongs to the technical field of rubber regeneration. According to the invention, the supercritical carbon dioxide fluid is utilized to realize efficient diffusion and permeation of the regeneration auxiliary agent to a rubber cross-linked network, under the dual effects of swelling of the swelling agent and the supercritical fluid, the mixed rubber powder is fully swelled, and the accelerant and the activator in the rubber powder fully play a depolymerization role, so that the regeneration efficiency and the regeneration physical and mechanical properties are improved. According to the invention, the swelling rubber powder is internally mixed, and under the action of internal mixing, the swelling rubber powder is subjected to strong mechanical shear uncoupling and dispersion mixing, so that the homogenization degree of the action of a mechanical force field, the sufficient action of a regeneration auxiliary agent and the accumulation of total shear amount are increased, and the uncoupling degree and processability of waste rubber are greatly improved; and the obtained regenerated rubber has high tensile strength.

Description

technical field [0001] The invention relates to the technical field of rubber regeneration, in particular to a waste rubber regeneration method and device. Background technique [0002] At present, tens of millions of tons of waste rubber are not fully utilized in my country every year, resulting in a serious waste of rubber resources. Carrying out the recycling of waste rubber resources is an important way to make waste rubber harmless, turn waste into treasure, protect the environment, and save resources. Among the many waste rubber recycling methods, the production of reclaimed rubber is the most high-value utilization method, that is, the three-dimensional cross-linked network structure of rubber is broken by physical, chemical or biological methods, and its processable plasticity is restored. Process of linear molecular structure. [0003] In order to achieve high-value recycling of waste rubber, various waste rubber regeneration equipment and regeneration methods hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/28C08J11/20C08J11/16B29B7/00
CPCC08J11/28C08J11/20C08J11/16B29B7/002C08J2319/00Y02W30/62Y02P20/54
Inventor 郭磊郝宽发王文超郭修瑞任东辉汪传生
Owner QINGDAO UNIV OF SCI & TECH