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Preparation method of reclaimed rubber using microwave desulfurization method

A microwave desulfurization and reclaimed rubber technology, applied in recycling technology, plastic recycling, etc., can solve the problems of low production efficiency, long production time, secondary pollution, etc., and achieve the effect of low equipment cost, environmental protection, and huge potential.

Inactive Publication Date: 2007-10-03
福建省晋江市陈埭江头茂泰橡塑厂 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods of producing reclaimed rubber through desulfurization of waste rubber mainly include chemical and physical methods. The current method of producing reclaimed rubber in my country is mainly high-temperature and high-pressure dynamic desulfurization in the chemical method. This method not only consumes a lot of energy, but also takes a long time to produce. Low, and there is secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Rubber scraps for shoes belong to a silica-filled system, and its silica content accounts for about 40% to 60%. The heat dissipation effect of microwave is not obvious, and the desulfurization is uniform. However, because the microwave thermal effect of white carbon black is not obvious, the desulfurization time is generally 5 to 40 minutes. The intermittent microwave desulfurization process is proposed to be adopted, and the temperature is controlled between 140-300°C. If the temperature is too low, the non-thermal effect of microwave is not enough to provide the fracture of the vulcanized cross-linked network; if the temperature is too high, it will exceed the activation energy of C-C bond fracture. , The rubber main chain is severely damaged. To break the C-S and S-S bonds, it is necessary to carry out desulfurization at an appropriate temperature (165-200°C).

[0019] In this example, leftovers for shoes were used, softener pine tar was added, and the rec...

Embodiment 2

[0021] Embodiment 2: Pulverize waste tires and waste rubber shoes to obtain waste rubber powder, pass through a 5-mesh sieve, remove iron filings and impurities from the waste rubber powder by electromagnetic means, and put the waste rubber powder after removing iron filings and impurities into a microwave desulfurization tank , adding rubber softener turpentine, according to the mass ratio, waste rubber powder: rubber softener turpentine=100:5; microwave heating desulfurization, heating temperature 220 ℃; The types of waste rubber include natural rubber, styrene-butadiene rubber, butadiene rubber, etc. The microwave frequency of the microwave used is 1000MHz, the microwave intensity is 0.25KW·h / Kg, and the microwave desulfurization time is 20min.

Embodiment 3

[0022] Embodiment 3: Pulverize waste tires, waste rubber shoes and scraps and waste materials produced in the production process of rubber tires to obtain waste rubber powder, pass through an 80 mesh sieve, remove iron filings and impurities from waste rubber powder by electromagnetic methods, and remove iron filings and Put the waste rubber powder after impurities into a microwave desulfurization tank, add rubber softener tall oil, according to the mass ratio, waste rubber powder: rubber softener tall oil=100:1; microwave heating desulfurization, heating temperature 170 ° C; desulfurization is completed Afterwards, cool to below 150°C, roll mill, and release the sheet. The types of waste rubber include natural rubber, butadiene rubber, neoprene and nitrile rubber. The microwave frequency of the microwave used is 945MHz, the microwave intensity is 0.1KW·h / Kg, and the microwave desulfurization time is 25min.

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PUM

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Abstract

This invention relates to preparation method of a kind of regenerated rubber, adopts microwave devulcanization process. It adopts microwave desulfurization method and mechanical desulfurization method, carry out desulfuration to scrap tire and scrap rubber by rubber power or colloidal particle form. The products can 100 percent substitute new rubber, as raw material of shoemaking or rubber goods. The process includes: shatter scrap rubber to gain power, transit 5 to 200 times screening; use magnetism method for removeing iron leavings and impurity; Then put the rubber power to microwave devulcanizing pan, add rubber emollient; the mass ratio of rubber powder and emollient is 100: 0 to 15; microwave heating desulfuration, heating temperature is 140 to 300 deg; cooling to 150 deg after desulfuration completed, roll and milling for piece.

Description

technical field [0001] The invention relates to the preparation of reclaimed rubber, in particular to a method for preparing reclaimed rubber by microwave desulfurization. Background technique [0002] Waste rubber mainly comes from rubber products such as waste tires, waste rubber shoes and waste tapes, and secondly from scraps and waste products generated in the rubber production process. It belongs to a large category of industrial solid waste and is used as a recycling polymer material. Recycling has attracted the attention of countries all over the world. The annual production of waste tires in my country is 2.2 million tons, plus the leftovers and rubber waste products of shoemaking and other rubber products enterprises, the total amount of waste rubber is more than 3 million tons, and it is increasing at a rate of about 25% per year. These waste rubbers are stacked in the open air for a long time, occupying a large amount of land, polluting the environment, and easil...

Claims

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Application Information

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IPC IPC(8): C08J11/12C08L17/00
CPCY02W30/62
Inventor 丁思博邹友思褚佳岩
Owner 福建省晋江市陈埭江头茂泰橡塑厂
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