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Method for recycling waste tire

A technology for waste tires and catalysts, which is used in the preparation of liquid hydrocarbon mixtures, the production of bulk chemicals, the petroleum industry, etc., can solve the problems of mosquitoes and bacteria, environmental pollution, and unsuitable filling treatment.

Inactive Publication Date: 2018-02-16
XINZHONGTIAN ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of the automobile industry, the problem of environmental pollution caused by waste tires is becoming more and more serious, which has attracted people's attention. Waste tires are difficult to biodegrade and can be incinerated or stacked in the open for a long time. Buried underground will hinder the flow of air and water, so It is not suitable for filling and processing; it is piled up on the ground like a mountain, occupying a large amount of land, and mosquitoes and germs will be born due to accumulated water, which will cause serious environmental pollution and cause fires. How to deal with and utilize waste tires has been become an urgent environmental issue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for recycling waste tires, comprising the steps of:

[0017] (1) After the waste tires are removed from the sediment and oil, and metal and fiber debris are removed, they are crushed into particles of 20-30 mesh;

[0018] (2) Add waste tires, hydrogen peroxide, catalyst and ethanol into a closed reactor, the concentration of the hydrogen peroxide is kept at 3.5%, and the catalyst is SiO 2 / Al 2 o 3 Catalyst, the addition amount is 0.5wt% of waste tire;

[0019] (3) The reactor is heated and pressurized to the supercritical state of ethanol, reacted for 30 minutes, and then the reactants in the reactor are lowered to normal temperature and normal pressure;

[0020] (4) Separating the solid and liquid of the reactant, and the separated solid is carbon black;

[0021] (5) Extract the liquid obtained in step (4) through chloroform extraction to obtain fuel oil.

Embodiment 2

[0023] A method for recycling waste tires, comprising the steps of:

[0024] (1) After the waste tires are removed from the sediment and oil, and metal and fiber debris are removed, they are crushed into particles of 20-30 mesh;

[0025] (2) Waste tires, hydrogen peroxide, SiO 2 / Al 2 o 3 Catalyst and ethanol are added in the airtight reactor, and the concentration of described hydrogen peroxide remains on 4%, and described SiO 2 / Al 2 o 3 The add-on of catalyzer is 2.5wt% of waste tire;

[0026] (3) The reactor is heated and pressurized to the supercritical state of ethanol, reacted for 40 minutes, and then the reactants in the reactor are lowered to normal temperature and normal pressure;

[0027] (4) Separating the solid and liquid of the reactant, and the separated solid is carbon black;

[0028] (5) Extract the liquid obtained in step (4) through chloroform extraction to obtain fuel oil.

Embodiment 3

[0030] A method for recycling waste tires, comprising the steps of:

[0031] (1) After the waste tires are removed from the sediment and oil, and metal and fiber debris are removed, they are crushed into particles of 20-30 mesh;

[0032] (2) Waste tires, hydrogen peroxide, SiO 2 / Al 2 o 3 Catalyst and ethanol are added in the airtight reactor, and the concentration of described hydrogen peroxide remains on 5%, and described SiO 2 / Al 2 o 3 The add-on of catalyzer is 3wt% of waste tire;

[0033] (3) The reactor is heated and pressurized to the supercritical state of ethanol, reacted for 30 minutes, and then the reactants in the reactor are lowered to normal temperature and normal pressure;

[0034] (4) Separating the solid and liquid of the reactant, and the separated solid is carbon black;

[0035] (5) Extract the liquid obtained in step (4) through chloroform extraction to obtain fuel oil.

[0036] The treatment method of Examples 1-3 can obtain 10%-15% of fuel oil...

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PUM

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Abstract

The invention discloses a method for recycling a waste tire. The method comprises the following steps: (1) cleaning off silt and oil stains from a waste tire, removing metal and fiber impurities, andperforming breaking to obtain particles of 20-30 meshes; (2) adding the waste tire, oxydol, a catalyst and ethanol into a closed reactor, wherein the catalyst is a SiO2 / Al2O3 catalyst; (3) performingheating and pressurization on the reactor to the supercritical state of the ethanol, performing a reaction for 30-40 minutes, and reducing the temperature and the pressure of the reaction product in the reactor to normal temperature and normal pressure; (4) performing solid-liquid separation on the reaction product, wherein the separated solid is carbon black; and (5) extracting the liquid separated in the step (4) through chloroform to obtain fuel. By combining the supercritical ethanol method and catalytic oxidation, organic substances in the waste tire can be completely decomposed, therebyobtaining more fuel; and meanwhile, the carbon black doped in the waste rubber tire can be completely separated, and the carbon black content in the solid is increased.

Description

technical field [0001] The invention relates to the technical field of recycling waste tires, in particular to a method for recycling waste tires. Background technique [0002] As automobiles gradually become the first engine to drive residents' consumption, China is already facing serious environmental pollution problems caused by waste tires. According to relevant reports, China has become the third country after the United States and Japan to produce more than 10 million vehicles per year, and has become a veritable "automotive power". However, with the advent of the automobile age, there are still mountains of waste tires. Waste tires are a kind of solid industrial waste. With the development of the rubber industry and the automobile industry, a large number of waste tires, rubber products and scraps are increasing. According to the statistics of the World Environmental Health Organization, the stock of waste tires in the world has reached 3 billion, and the figure is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/10C09C1/48
CPCC09C1/48C10G1/10Y02P20/54
Inventor 阳杨胡懿林辉荣胡茂丽马泽州左娇
Owner XINZHONGTIAN ENVIRONMENTAL PROTECTION
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