Industrial method of reusing waste plastics to produce gasoline and diesel oil

A technology of waste plastics and gasoline, applied in the petroleum industry, products, preparation of liquid hydrocarbon mixtures, etc., can solve the problems of high conversion rate of oil products, achieve the effect of increasing octane number and solving poor thermal conductivity

Inactive Publication Date: 2004-09-08
北京斯泰普文投资顾问有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical solution of the present invention is to provide a method for producing gasoline and diesel from waste plastics in an industrialized manner that does not require complex catalytic cracking equipment, can be produced continuously, has high conversion rate of oil products, good quality of oil products, low cost, and saves energy. , so as to solve the defects in the existing methods of producing gasoline and diesel from waste plastics

Method used

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  • Industrial method of reusing waste plastics to produce gasoline and diesel oil
  • Industrial method of reusing waste plastics to produce gasoline and diesel oil

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The first step is to blend waste plastics polyethylene, polypropylene, and polystyrene in a ratio of 1:1:0.8, such as 100 kg of polyethylene, 100 kg of polypropylene, and 80 kg of polystyrene;

[0033] The second step is to push the waste plastics blended according to the above ratio into a tank-shaped or vertical reactor with a double-ribbon agitator inside and a molten salt as a heat-conducting medium jacket with a hydraulic propeller to heat, liquefy, and crack. The salt temperature is 450°C, and the heating liquefaction cracking temperature in the reactor is 350°C;

[0034] In the third step, the waste plastics in the reaction kettle are heated and cracked, and the materials produced by the reaction enter the visbreaker or other mild low-temperature cracking device for visbreaking distillation. The visbreaking temperature is 250°C, and the cracked gas is condensed by the condenser to form The liquid is sent to the rectification tower for rectification;

[0035]The ...

Embodiment 2

[0038] The first step is to blend waste plastics polyethylene and polystyrene in a ratio of 1:0.4, such as 100 kg of polyethylene and 40 kg of polystyrene;

[0039] The second step is to push the waste plastic blended according to the above ratio into a tank-shaped or vertical reactor with a double-ribbon agitator inside and a jacket of molten salt as a heat-conducting medium with a hydraulic propeller. Heating liquefaction and cracking, the molten salt temperature is 550°C, and the heating liquefaction temperature in the reactor is 450°C;

[0040] In the third step, the waste plastic in the reaction kettle is heated and cracked, and the material generated by the reaction enters the visbreaker or other mild low-temperature cracking device for visbreaking distillation. The visbreaking temperature is 300°C, and the cracked gas is condensed by the condenser to form The liquid is sent to the rectification tower for rectification;

[0041] The fourth step, at the same time, the mo...

Embodiment 3

[0044] In the first step, thermoplastic waste plastics such as polypropylene and polystyrene are blended in a ratio of 1:0.4, such as 100 kg of polypropylene and 40 kg of polystyrene;

[0045] The second step is to heat and liquefy the waste plastic blended according to the above ratio with a hydraulic propeller into a reaction kettle with a double ribbon agitator inside and a jacket with molten salt as a heat-conducting medium. The temperature of the molten salt is 500°C. The heating liquefaction temperature in the reaction kettle is 380°C,

[0046] In the third step, the waste plastics in the reaction kettle are heated and cracked, and the materials produced by the reaction are put into the visbreaker for visbreaking distillation. distillation;

[0047] The fourth step, at the same time, the molten plastic in the reactor is continuously pumped into the solid-liquid separation cylinder with molten salt separation liquid through the pump, and the residue and soil in the react...

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Abstract

The present invention is industrial method of reusing waste plastics to produce gasoline and diesel oil. Waste plastics including polyethylene, polypropylene and polystyrene in certain proportion are mixed and heated to liquefy and crack inside one reactor with double-screw stirrer inside it and molten salt inside sandwiched layer as heat conducting medium; the produced material is viscosity reducing cracked and the cracked gas is condensated into liquid fed to rectifying tower; molten plastic liquid is pumped from the reactor into one solid-liquid separator with separating molten salt liquid to separate residue and dirt; clean molten plastic is returned to the reactor while the separated residue and dirt is exhausted via screw extruder in the bottom of the separator; and decompression distillation is performed to produce oil. The present invention can produce oil with high quality in low cost and high conversion rate while tackling white pollution.

Description

Technical field [0001] The invention relates to a method for industrially using waste plastics to produce gasoline and diesel oil, and belongs to the field of petrochemical refining. Background technique [0002] Since the 1970s, many scientific researchers around the world have devoted a lot of manpower and material resources to the research of using waste plastics to produce gasoline and diesel, especially in my country, where more than 100 patent documents have been published. , and unanimously recognized that using waste plastics to produce gasoline and diesel technology is a better method of recycling plastics. As far as the currently published patent documents are concerned, the existing method of producing gasoline and diesel from waste plastics is mainly to adopt complex catalytic cracking technology to waste plastics, and then directly burn them with fire to form a liquid with high viscosity after oilification, and then through refining Distillation tower to obtain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B47/44C10B53/07C10G1/10
CPCC10B47/44C10B53/07C10G1/10Y02P20/143
Inventor 党德润
Owner 北京斯泰普文投资顾问有限公司
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