Method for preparing aromatic hydrocarbon by hydrocracking aromatic ring-containing polymer

A hydrocracking and aromatic ring technology, which is applied in the production of hydrocarbons from oxygen-containing organic compounds, hydrocarbon cracking to produce hydrocarbons, and hydrocarbons, etc., can solve the problems of complex products and low yields, and achieve high added value and good industrial effect of value

Pending Publication Date: 2020-11-06
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the purpose of the present invention is to propose a method for preparing aromatic hydrocarbons by hydrocracking polymers containing aromatic rings, so as to solve the problems of complex products and low yields in the recycling of existing plastics

Method used

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  • Method for preparing aromatic hydrocarbon by hydrocracking aromatic ring-containing polymer
  • Method for preparing aromatic hydrocarbon by hydrocracking aromatic ring-containing polymer
  • Method for preparing aromatic hydrocarbon by hydrocracking aromatic ring-containing polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Test material: polymer containing aromatic ring: polyethylene terephthalate, polymer mass containing aromatic ring: 0.1g; solvent: water, solvent mass: 10g; substrate concentration: 1%;

[0087] Catalyst: the active component is Ru, the carrier is Nb 2 o 5 , catalyst quality 0.1g;

[0088] Test conditions: hydrogen pressure: 0.3MPa; reaction temperature: 200°C; reaction time: 10h;

[0089] Test method: crush 0.1g polyethylene terephthalate to 10mm in a pulverizer, and disperse the crushed polyethylene terephthalate in 10g water, then separate the dispersion and 0.1g Ru / Nb 2 o 5 Put it into a stainless steel high-pressure reactor with a polytetrafluoroethylene liner, seal it, fill it with 0.3MPa hydrogen, heat up to the required temperature of 200°C under rapid stirring, stop after 10 hours of reaction, cool, and centrifuge the catalyst, and take the supernatant The liquid is distilled sequentially from low to high boiling points to obtain toluene and 62% p-xylene ...

Embodiment 2

[0091] The only difference from Example 1 is that the active component in the catalyst is Fe.

Embodiment 3

[0093] The only difference from Example 1 is that the active component in the catalyst is Co.

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Abstract

The invention provides a method for preparing aromatic hydrocarbon by hydrocracking an aromatic ring-containing polymer. The method comprises the following steps: reacting crushed polymer with hydrogen at the temperature of 350 DEG C or below under the action of a catalyst; separating reaction products to obtain aromatic hydrocarbons. The catalyst comprises a carrier and an active component loadedon the carrier, wherein the active component is selected from at least one of Ru, Rh, Pt, Pd, Fe, Ni, Cu and Co; wherein the carrier is selected from at least one of a metal oxide, a phosphate, a molecular sieve, SiO2 and sulfonated carbon, and the metal oxide is selected from at least one of Al2O3, Nb2O5, Nb2O5-Al2O3, Nb2O5-SiO2, TiO2, ZrO2, CeO2 and MoO3; the phosphate is selected from at leastone of NbOPO4 and ZrOPO4; wherein the molecular sieve is selected from at least one of Nb-SBA-15, Nafion, H-ZSM-5, H-Beta and H-Y in a molecular screening manner.

Description

technical field [0001] The invention relates to the technical field of industrial catalysis, in particular to a method for preparing aromatic hydrocarbons by hydrocracking polymers containing aromatic rings. Background technique [0002] Plastic pollution is one of the most serious environmental pollution, and most plastics are organic synthetic polymer materials. It is estimated that the annual global plastic production has reached 334.83 million tons, but due to technical problems, only 14% can be recycled. When recycling, the yield of plastic needs to reach 30% before it can be produced industrially. At present, the main processes for recycling plastics are combustion, decomposition, and pyrolysis / cracking. For combustion treatment, toxic waste gas is often produced, and the product is complex; for decomposition treatment, the product is usually complex, the yield is very low, and the decomposition is not complete; pyrolysis / cracking treatment usually requires a high te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/04C07C15/06C07C15/073C07C15/08C07C15/085C07C13/45C07C1/22C07C4/00C07C1/32B01J23/648B01J23/847B01J29/03B01J27/195B01J29/44B01J23/63
CPCC07C1/22C07C4/00C07C1/322B01J23/6484B01J23/002B01J23/8474B01J29/0341B01J27/195B01J29/44B01J23/63B01J2523/00C07C2523/648C07C2523/847C07C2523/63C07C2529/03C07C2529/44C07C2527/195C07C15/06C07C15/08C07C15/073C07C15/04C07C15/085C07C13/45B01J2523/41B01J2523/56B01J2523/821Y02P20/52B09B3/40B09B2101/75C08J11/16C08J2367/02C07C1/20C07C4/06C07C2521/04C07C2521/08C07C2523/10C07C2523/20C07C2523/42C07C2523/44C07C2523/46C07C2523/72C07C2523/745C07C2523/75C07C2523/755
Inventor 王艳芹景亚轩郭勇刘晓晖颜宁
Owner EAST CHINA UNIV OF SCI & TECH
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