Method for desulfurizing waste tires by using supercritical carbon dioxide

A carbon dioxide and waste tire technology, applied in the field of waste tire desulfurization, can solve the problems of high density, dark color, high sulfur content, etc., and achieve the effects of simple operation, strong process controllability and simple technical process

Pending Publication Date: 2022-02-11
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sulfur content in waste tire pyrolysis oil is very high, which makes it have disadvantages such as dark color, high viscosity, and high density, which restricts its industrialization prospect

Method used

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  • Method for desulfurizing waste tires by using supercritical carbon dioxide
  • Method for desulfurizing waste tires by using supercritical carbon dioxide

Examples

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Effect test

Embodiment 1

[0033] A method of supercritical carbon dioxide for use in waste tire deulfurization, the specific steps are as follows:

[0034] (1) From the waste tire to cut the tread glue, simply cleans it, then remove the surface of the tread glue into small pieces, placed in the crusher, crush the sieve, the present invention selects the particle size Tire particles of 0.55-1mm;

[0035] (2) Weigh 2G waste tire samples and 0.2 g of desulfurizing agent diphennesulfide, mix the two;

[0036] (3) Place the mixture in a supercritical carbon dioxide reaction kettle, with a vacuum pump to extract the air in the reactor, and turn off the pressure relief valve after row;

[0037] (4) Turn carbon dioxide into the reactor, the pressure of the kettle is 10 MPa, and the carbon dioxide is packed into the reaction kettle to reach the predetermined pressure value, and at the same time the temperature is 250 ° C, the temperature is 250 ° C, this temperature pressure under temperature pressure conditions In...

Embodiment 2

[0042] A method of supercritical carbon dioxide for use in waste tire deulfurization, the specific steps are as follows:

[0043] (1) From the waste tire to cut the tread glue, simply cleans it, then remove the surface of the tread glue into small pieces, placed in the crusher, crush the sieve, the present invention selects the particle size Tire particles of 0.55-1mm;

[0044] (2) Weigh 2G waste tire samples and 0.2 g of desulfurizing agent diphennesulfide, mix the two;

[0045] (3) Place the mixture in a supercritical carbon dioxide reaction kettle, with a vacuum pump to extract the air in the reactor, and turn off the pressure relief valve after row;

[0046](4) Carbon dioxide in the reactor, the pressure of the kettle is 10 MPa, and the carbon dioxide is packed into the reaction kettle to reach the predetermined pressure value, and the temperature is 1050 ° C, the temperature pressure is carbon dioxide under temperature pressure. In the supercritical state;

[0047] (5) The re...

Embodiment 3

[0051] A method of supercritical carbon dioxide for use in waste tire deulfurization, the specific steps are as follows:

[0052] (1) From the waste tire to cut the tread glue, simply cleans it, then remove the surface of the tread glue into small pieces, placed in the crusher, crush the sieve, the present invention selects the particle size Tire particles of 0.55-1mm;

[0053] (2) Weigh 2G waste tire samples and 0.2 g of desulfurizing agent diphennesulfide, mix the two;

[0054] (3) Place the mixture in a supercritical carbon dioxide reaction kettle, with a vacuum pump to extract the air in the reactor, and turn off the pressure relief valve after row;

[0055] (4) Turn carbon dioxide into the reactor, the pressure of the kettle is 10 MPa, and the carbon dioxide is packed into the reaction kettle to reach the predetermined pressure value, and at the same time the temperature is 250 ° C, the temperature is 250 ° C, this temperature pressure under temperature pressure conditions In...

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Abstract

The invention discloses a method for desulfurizing waste tires by using supercritical carbon dioxide, and belongs to the technical field of waste tire desulfurization. Under the condition of specific temperature and pressure, supercritical carbon dioxide is used as a reaction medium, the supercritical carbon dioxide has excellent dissolvability and permeability, the tire can be swelled in the reaction process, a desulfurizing agent is brought into the tire, and reacts with a main chain or a cross-linked bond in a cross-linked network structure to remove the sulfur element from the interior of the tire. The method is simple in technical process, high in process controllability and easy to operate.

Description

Technical field [0001] The present invention relates to the field of waste tire deulfurization techniques, specifically a method of removing sulfur elements in waste tires using supercritical carbon dioxide. Background technique [0002] With the development of the economy and the prosperity of the automobile industry, the car has entered thousands of households, and the output of waste tires is also increasing. The waste tire is a polymer polymer, and the crosslinked structure is generated by vulcanization treatment, which is extremely stable. Its treatment is larger than the general solid waste, and it is difficult to descend to decline in natural conditions. Therefore, the treatment of waste tires has always been a key and difficult problem facing the automotive industry. [0003] There are three main ways of recycling of waste tires now: the re-enabled prototype is re-enabled, which is mainly refurbished by the old tire production into regenerated rubber powder or tire. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/28C08J11/10C08L19/00
CPCC08J11/28C08J11/10C08J2319/00Y02P20/54Y02W30/62
Inventor 刘宁王星丽于刚强代成娜陈标华徐瑞年王宁
Owner BEIJING UNIV OF TECH
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