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Method for refining oil through depolymerizing and liquifying waste plastics and device used in method

A technology for refining equipment and waste plastics, applied in plastic recycling, petroleum industry, chemical recycling, etc., can solve problems such as high energy consumption and coking, and achieve the effect of ensuring the quality of refined oil products

Inactive Publication Date: 2015-04-01
HUIZHOU SHENZHOU CHUANGYU LOW CARBON TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a waste plastic depolymerization liquefaction oil refining method and its device to solve the problems of high energy consumption and coking in the prior art

Method used

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  • Method for refining oil through depolymerizing and liquifying waste plastics and device used in method
  • Method for refining oil through depolymerizing and liquifying waste plastics and device used in method
  • Method for refining oil through depolymerizing and liquifying waste plastics and device used in method

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Embodiment Construction

[0034] A method for depolymerizing liquefaction of waste plastics described in an embodiment of the present invention includes the following steps:

[0035] 1) Use chlorobenzene as the liquefaction solvent, use sulfuric acid with a concentration of 1% as the catalyst, and carry out the depolymerization reaction at 110-130°C. The depolymerization reaction time is about 45 minutes to 1 hour.

[0036] 2) The depolymerized product is acidic, neutralized with sodium hydroxide aqueous solution, and then washed with water. After washing, the water and sodium sulfate in the liquid are removed through oil-water separation, and the plastic depolymerized chlorobenzene solution is obtained, which is used for plastic depolymerization. The chlorobenzene dissolved liquid is subjected to vacuum distillation, and the chlorobenzene solvent is recovered. The solvent recovery rate is not less than 90%, and it is continued to be used as a liquefaction solvent.

[0037] 3) After vacuum distillation...

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Abstract

The invention relates to a method for refining oil through depolymerizing and liquifying waste plastics and a device used in the method. The method comprises the following steps of (1) crushing the waste plastics; (2) carrying out depolymerization reaction on the crushed waste plastics; (3) neutralizing a depolymerized acidic product by using a sodium hydroxide solution; (4) further washing to obtain a plastic depolymerization chlorobenzene dissolved liquid; (5) carrying out reduced pressure distillation on the plastic depolymerization chlorobenzene dissolved liquid; (6) carrying out cracking reaction and condensing to obtain a cracked fuel oil mixture; (7) rectifying and catalyzing the cracked fuel oil. The method has the beneficial effects that the depolymerization and liquidation of the plastics are realized by using a solvent and acid catalysis technology on the basis of a liquifying technology for plastics such as polyurethane, polyester and the like used in the chemical fiber industry; the cracking temperature is controlled within 360 DEG C in heating and cracking, so that the coking phenomenon is avoided; a porous nickel and chromium salt loaded catalyst is used, and the catalyst is prepared by using a ceramic sintering method, so that the quality of a refined oil product is ensured.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a waste plastic depolymerization liquefaction refining method and a device thereof. Background technique [0002] Waste plastics have become a public hazard in the world, and the environmental pollution caused by waste plastics is very serious. The total amount of waste plastics produced in China every year is not less than 25 million tons, and the scale is very large. However, there is still a large amount of imported waste in China, such as Zhaoqing in Guangdong, Wenling in Zhejiang, Jinghai in Tianjin, Yingkou in Liaoning, Hong Kong and other places that receive billions of tons of e-waste and scrapped cars from developed countries every year, among which the amount of waste plastics is huge. an important source of environmental pollution. [0003] It is a good idea to recycle waste plastics as renewable energy, but due to imperfect technology, the domestic waste plastics re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00C10G7/00C08J11/20C08J11/16
CPCY02P20/584Y02W30/62
Inventor 侯小兵
Owner HUIZHOU SHENZHOU CHUANGYU LOW CARBON TECH DEV
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