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A method for producing environmentally friendly high-strength butyl reclaimed rubber at high temperature and normal pressure

A technology for butyl reclaimed rubber and waste butyl rubber, which is applied in recycling technology, plastic recycling and other directions, can solve the problems of polycyclic aromatic hydrocarbon content not meeting EU standards, pollution of the use environment and production environment, and low mechanical strength. Achieve excellent physical and chemical properties, ensure worker health, and reduce toxic and harmful components

Inactive Publication Date: 2017-10-31
河北茂祥橡胶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of polycyclic aromatic hydrocarbons in traditional butyl inner tube reclaimed rubber is relatively high. In the process of traditional inner tube processing and regeneration, softeners such as coal tar and petroleum extracts with complex components, unpleasant smell and high carcinogens are added. The use environment and production environment of the rubber have caused pollution, and the mechanical strength is low. Therefore, the content of polycyclic aromatic hydrocarbons in the traditional reclaimed rubber produced by using waste butyl inner tubes does not meet the EU standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The waste butyl rubber inner tube selected is waste butyl inner tube for load.

[0020] A method for producing environmentally friendly high-strength butyl reclaimed rubber at high temperature and normal pressure, prepared according to the following steps:

[0021] Step 1) Material selection and crushing: Screen waste butyl rubber inner tubes with a tensile strength of about 9.0 MPa, crush them with a crusher, and then crush them with a crusher;

[0022] Step 2) Sieving and magnetic separation: After step 1), the crushed waste butyl rubber inner tube is subjected to magnetic separation, and then the crushed inner tube is screened with a 2-4 mesh screen to obtain waste butyl rubber powder;

[0023] Step 3) Desulfurization and removal of polycyclic aromatic hydrocarbons: Add waste butyl rubber powder to a screw extruder connected to a vacuum device for continuous high-temperature desulfurization with the temperature controlled at 300°C , the screw speed is controlled at...

Embodiment 2

[0029] The waste butyl rubber inner tube selected is waste butyl inner tube for engineering.

[0030] A method for producing environmentally friendly high-strength butyl reclaimed rubber at high temperature and normal pressure, prepared according to the following steps:

[0031] Step 1) Material selection and crushing: Screen waste butyl rubber inner tubes with a tensile strength of about 10.0 MPa, crush them with a crusher, and then crush them with a crusher;

[0032] Step 2) Sieving and magnetic separation: After step 1), the crushed waste butyl rubber inner tube is subjected to magnetic separation, and then the crushed inner tube is screened with a 2-4 mesh screen to obtain waste butyl rubber powder;

[0033] Step 3) Desulfurization and removal of polycyclic aromatic hydrocarbons: Add waste butyl rubber powder to a screw extruder with a vacuum device for continuous desulfurization at high temperature, and the temperature is controlled at 350°C , the screw speed is control...

Embodiment 3

[0039] The waste butyl rubber inner tube selected is ordinary butyl inner tube.

[0040] A method for producing environmentally friendly high-strength butyl reclaimed rubber at high temperature and normal pressure, prepared according to the following steps:

[0041] Step 1) Material selection and crushing: Screen waste butyl rubber inner tubes with a tensile strength of about 8.5 MPa, crush them with a crusher, and then crush them with a crusher;

[0042] Step 2) Sieving and magnetic separation: After step 1), the crushed waste butyl rubber inner tube is subjected to magnetic separation, and then the crushed inner tube is screened with a 2-4 mesh screen to obtain waste butyl rubber powder;

[0043] Step 3) Desulfurization and removal of polycyclic aromatic hydrocarbons: Add waste butyl rubber powder to a screw extruder with a vacuum device for continuous desulfurization at high temperature, and the temperature is controlled at 250°C , the screw speed is controlled at 75 rpm;...

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Abstract

The invention provides a method for producing environment-friendly high-strength butyl-reclaimed rubber under a high-temperature and normal-pressure condition. According to the method, a waste butyl rubber inner tube with the tensile strength being 8.5-10.0 MPa is selected, waste butyl rubber powder is added into a double-screw extruder connected with a vacuum device, no softener or regeneration activator is added, continuous high-temperature desulfuration is conducted, and in the continuous high-temperature desulfuration process of the double-screw extruder, toxic and harmful substances such as polycyclic aromatic hydrocarbon in rubber materials are collected, absorbed and treated through the vacuum device. In addition, no softener or regeneration activator is added in the regeneration process of the waste butyl rubber, and the pollution problem of reclaimed rubber preparation is well solved. The reclaimed rubber produced through the method is good in mechanical property and physical and chemical property.

Description

technical field [0001] The invention relates to a method for producing environmentally friendly high-strength butyl reclaimed rubber under high temperature and normal pressure, and belongs to the field of regenerated rubber preparation. Background technique [0002] With the rapid development of the automobile industry and the butylization of inner tubes, more and more butyl inner tubes are scrapped. According to statistics, in recent years, 1.5 million tons of butyl inner tubes are scrapped every year in the world. In the case of shortage of rubber resources in our country, butyl rubber is expensive and has excellent air-tightness and other comprehensive properties. Effective utilization of these discarded butyl inner tubes has become a problem that the rubber industry in the world has paid attention to. The content of polycyclic aromatic hydrocarbons in traditional butyl inner tube reclaimed rubber is relatively high. In the process of traditional inner tube processing and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B17/00B29B13/10
CPCB29B13/10B29B17/00B29B2017/001Y02W30/62
Inventor 王艳秋祝木伟翁国文张芳儒徐云慧丛后罗臧亚南
Owner 河北茂祥橡胶制品有限公司
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