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A method of processing waste plastics and cellulose

A technology for waste plastics and cellulose, which is used in hydrotreating process, petroleum industry, preparation of liquid hydrocarbon mixtures, etc., can solve problems such as large gaps in process conditions, reduce the amount of insoluble matter, improve the conversion rate, promote dissolution and The effect of catalytic conversion

Active Publication Date: 2019-09-17
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, studies on the direct liquefaction of plastics and cellulose have found that there is a large gap between the reaction conditions and catalysts required by the two. Directly liquefying waste plastics and cellulose together has a great impact on the types of reactants, reaction conditions, and catalysts. etc. have high requirements, which pose certain challenges to the co-processing of waste plastics and cellulose

Method used

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  • A method of processing waste plastics and cellulose

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056]Select a total of 2g of a mixture of 50wt% HDPE, 30wt% PET, and 20wt% PS as the raw material for the reaction of waste plastics, and add it to the slurry bed catalytic cracking reactor A, under the catalytic action of catalyst 1-A. For the catalytic cracking reaction, the amount of catalyst 1-A added is 12% of the total mass of waste plastics. The reaction conditions for the catalytic cracking reaction are as follows: the reaction temperature is 455°C, the reaction time is 60 minutes, and the stirring rate is 440 rpm. It is necessary to feed hydrogen gas into the catalytic reactor A, the hydrogen partial pressure is 2.8MPa, and the product after the reaction is separated to obtain liquid product I, gas I and insoluble matter I; the liquid product I is cooled to room temperature and then passed into tetrahydrofuran and cyclohexane mixed solvent for extraction, the mass ratio of tetrahydrofuran and cyclohexane mixed solvent to liquid product I is 1.8:1, wherein the mass rat...

Embodiment 2

[0059] Just change the reaction condition of the catalytic cracking reaction that carries out in the slurry bed catalytic cracking reactor A among the embodiment 1: temperature of reaction is 460 ℃, and the reaction times is 110 minutes, and stirring rate is 480 rev / mins, needs in the reaction to Pass into hydrogen in the slurry bed catalytic cracking reactor A, hydrogen partial pressure is 3.6MPa, the condition of slurry bed catalytic cracking reactor C carrying out deep catalytic cracking reaction is changed: reaction temperature is 575 ℃, and reaction time is 120 minutes, The stirring rate is 500 rpm, and the reaction needs to feed hydrogen into the slurry bed catalytic cracking reactor C, and the hydrogen partial pressure is 7.4MPa.

Embodiment 3

[0061] Just change the catalyst 1-A in the embodiment 1 into the catalyst 1-B, and the others are the same as the embodiment 1.

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Abstract

The invention discloses a method for processing waste plastics and cellulose. The method comprises the following steps: carrying out catalytic cracking on waste plastics to obtain a product; separating the product to obtain a liquid product I, gas I and an undissolved substance I; mixing the liquid product I through a mixed solvent of tetrahydrofuran and cyclohexane to obtain a mixed solvent of aliquid product II and a residual liquid product III; carrying out a catalytic reaction on the mixed solvent and cellulose; separating the mixture to obtain a liquid product I, gas I and an undissolvedproduct i; carrying out extraction on the liquid product i separately through tetrahydrofuran and cyclohexane to obtain a liquid product ii, a liquid product iii and a residual liquid product iv; carrying out deep catalytic cracking reaction on the liquid products III and iv and the undissolved substances I and I to obtain a product; carrying out gas-liquid-solid separation on the product; and extracting and separating the separated liquid product V separately through tetrahydrofuran and cyclohexane to obtain a liquid product VI and a liquid product VII. According to the method, not only thetotal conversion rate be improved, but also a target reaction is promoted to improve the liquid yield.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, in particular to a method for processing waste plastics and cellulose. Background technique [0002] The garbage generated by the use of a large number of plastic products not only seriously pollutes the environment, but also causes a waste of resources. At present, the consumption of plastic products is huge, and a large amount of waste plastics are produced every year. However, the recycling and sorting efficiency of waste plastics is generally low, and it is difficult to continuously supply various types of waste plastics. Therefore, it is difficult to form waste plastics separately. Large-scale continuous production. Although the output of cellulose is large, most of it is directly incinerated at present, causing a lot of air pollution and waste of resources. At present, there have been some studies on the liquefaction technology of plastics and the optimal utilization of cell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00C10G1/06C10G1/08C10G67/14
Inventor 狄佐星罗明生张绍伟
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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