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Method for preparing fuel oil by utilizing waste polymer containing heteroatoms through cracking

A polymer and heteroatom technology, applied in the preparation of liquid hydrocarbon mixtures, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve high temperature and pressure, high temperature and pressure, reaction Long time and other problems, to avoid easy poisoning and high efficiency of removing heteroatoms

Active Publication Date: 2012-09-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the solvent degradation method has the above advantages, for polymers whose main chain does not contain heteroatoms, the solvent degradation method cannot effectively crack the polymer; and if the polymer is to be further cracked to generate small molecular compounds, more High temperature and pressure, which requires special reaction equipment to withstand high temperature and pressure
On the other hand, if a higher degree of removal of heteroatoms is to be achieved under mild conditions, the reaction time is longer and the efficiency is lower; and if the removal of heteroatoms is to be performed quickly and efficiently, a higher temperature is required. and pressure, higher requirements for reaction equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, stir and mix 100 parts of waste polymers containing heteroatoms, 250 parts of 1,4-dioxane, 10 parts of triethylene glycol, and 100 parts of potassium hydroxide, and heat to 160 ° C for 30 minutes; then the solvent After being separated from the reaction product, the remaining solid phase product and the catalyst iron oxide are added to the cracking reactor in a ratio of 1:0.2 by weight, and heated to 500°C for 30 minutes under the cracking pressure of 760mmHg, and the generated gas Through the condenser, it is separated into non-condensable gas and fuel oil. The yield of the obtained fuel oil was 86.9%, and the analysis results of the fuel oil elements are shown in the table.

Embodiment 2

[0025] First, 100 parts of waste polymers containing heteroatoms, 50 parts of ethanol, 0.5 parts of polyethylene glycol, and 0.5 parts of potassium tert-butoxide are stirred and mixed uniformly, and heated to 60 ° C for 120 minutes; then the solvent is separated from the reaction product After that, the remaining solid phase product and catalyst iron-carbon composite oxide and iron oxide (Fe-C: iron oxide=1: 1, weight ratio) are added in the cracking reactor in the proportioning ratio of 1: 0.05 by weight. Under the pressure of 500mmHg, heat to 450°C for cracking reaction for 40 minutes, and the generated gas passes through the condenser and is separated into non-condensable gas and fuel oil. The yield of the obtained fuel oil was 72.6%, and the analysis results of the fuel oil elements are shown in the table.

Embodiment 3

[0027] First, stir and mix 100 parts of waste polymers containing heteroatoms, 50 parts of ethanol, 200 parts of water, 10 parts of polyethylene glycol, 30 parts of magnesium hydroxide, 30 parts of potassium hydroxide, and 40 parts of sodium hydroxide, and heat React at 160°C for 30 minutes; then, after separating the solvent from the reaction product, add the remaining solid phase product and the catalyst X-type molecular sieve into the cracking reactor in a ratio of 1:0.1 by weight, and heat to Cracking reaction at 200°C for 60 minutes, the generated gas passes through the condenser and is separated into non-condensable gas and fuel oil. The yield of the obtained fuel oil was 63.8%, and the analysis results of the fuel oil elements are shown in the table.

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PUM

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Abstract

The invention discloses a method for preparing fuel oil by utilizing a waste polymer containing heteroatoms through cracking, which comprises the steps of: stirring and mixing 100 portions of the waste polymer containing the heteroatoms, 10 to 250 portions of solvent, 0.1 to 10 portions of phase transfer catalyst and 0.1 to 100 portions of alkaline compound evenly, and heating the mixture to between 60 and 260 DEG C to react for 10 to 120 minutes; and then separating the solvent from the reaction product, then adding a residual solid phase product and the catalyst into a cracking reactor according to the weight ratio of 1: 0.01-0.2, heating the mixture to between 200 and 700 DEG C to perform cracking reaction for 5 to 60 minutes under the cracking pressure of between 30 and 760 mmHg, and separating the generated gas into incoagulable gas and the fuel oil through a condenser. A solvent degradation method is adopted to efficiently remove the heteroatoms before the catalytic thermal cracking, so the method efficiently solves the problems existing due to the direct adoption of a thermal cracking method, is favorable for obtaining clean fuel oil with high grade, and also solves the problems of easy poisoning, short service life and poor regeneration property of the catalyst during the thermal cracking and the like.

Description

technical field [0001] The invention belongs to the technical field of recycling and preparing fuel oil from waste polymers, and specifically relates to a new method for preparing fuel oil by reclaiming waste polymers containing heteroatoms by using two-step methods, namely solvent degradation method and catalytic pyrolysis method: firstly, under mild conditions The heteroelements (N, Br, Cl, S, etc.) in the system are removed by solvent degradation, and then the polymer from which the heteroatoms have been removed is subjected to catalytic thermal cracking to produce fuel oil. Background technique [0002] Energy and the environment are two major themes that have aroused great concern in the world today. With the wide application of polymers in people's production and life, a large amount of waste polymers is brought along, which not only causes serious environmental pollution, but also causes a great waste of social resources. [0003] In order to eliminate the environmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00B01J31/02B01J31/06
Inventor 周茜杜安珂杨嘉伟赵涛江先洪汪秀丽杨科珂陈思翀王玉忠
Owner SICHUAN UNIV