Hydrocracking aromatic polymer and method for preparing aromatic hydrocarbon from heavy aromatic hydrocarbon

A technology of aromatic polymers and hydrocracking, which is applied in the preparation of liquid hydrocarbon mixtures, cracking of hydrocarbon oils, and treatment of hydrocarbon oils, etc., and can solve the problems of increasing the cost of catalyst production

Active Publication Date: 2022-04-29
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods inevitably use active metal

Method used

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  • Hydrocracking aromatic polymer and method for preparing aromatic hydrocarbon from heavy aromatic hydrocarbon
  • Hydrocracking aromatic polymer and method for preparing aromatic hydrocarbon from heavy aromatic hydrocarbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Test material: polymer containing aromatic ring: polystyrene; polymer mass containing aromatic ring: 0.1 g; solvent: dodecane; solvent mass: 2 g; substrate concentration: 5%;

[0035] Catalyst: niobium oxide prepared by hydrothermal method, catalyst mass 0.1 g;

[0036] Test conditions: batch reactor; hydrogen pressure: 0.5 MPa; reaction temperature: 280°C;

[0037] Reaction time: 12 hours;

[0038] Test method: crush 0.1 g polystyrene in a pulverizer until it can pass through a 40-mesh sieve, and disperse the crushed polystyrene in 2 g dodecane, and then put the dispersion and 0.1 g niobium oxide into the In a 50 ml stainless steel autoclave, seal it, fill it with 0.5 MPa hydrogen, heat up to the required temperature of 280°C under rapid stirring, stop the reaction after 12 hours, cool, centrifuge the catalyst, and rectify the supernatant to obtain the product benzene, Ethylbenzene, cumene, indene and substituted indene, the molar yield of benzene can reach 40%.

Embodiment 2

[0040] The only difference from Example 1 is that the catalyst is niobium phosphate.

Embodiment 3

[0042] The only difference from Example 1 is that the catalyst is niobium silicon mixed oxide.

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Abstract

The invention provides a metal-site-free method for preparing aromatic hydrocarbon by hydrocracking aromatic polymer and heavy aromatic hydrocarbon by dissociating hydrogen through an oxide, which comprises the following steps of: reacting the aromatic polymer with a catalyst in the presence of hydrogen at the temperature of below 350 DEG C; and rectifying and separating reaction products to obtain aromatic hydrocarbons. The catalyst contains at least one of niobium oxide, niobium phosphate, a niobium-silicon mixed oxide, a niobium-aluminum mixed oxide and a porous carbon-niobium material.

Description

technical field [0001] The invention relates to a method for preparing aromatic hydrocarbons by hydrocracking polymers containing aromatic rings and heavy aromatic hydrocarbons, and belongs to the technical field of carbon resource utilization. Background technique [0002] Lignin in biomass, as well as aromatic plastics known as white pollution, are rich in aromatic ring structures, and their conversion into human-usable, clean energy is a very promising strategy. Since lignin and aromatic plastics are polymers with large molecular weight and high rigidity, it is difficult to catalytically degrade them into usable small molecule fine chemicals. At present, the utilization of lignin and aromatic plastics is generally processed by pyrolysis / cracking, which usually requires high temperatures above 500°C (CN106947509A, CN103484142A), which has the problems of low yield and selectivity, and is difficult to industrialize. A further utilization method is to use a specific carrier...

Claims

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Application Information

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IPC IPC(8): C10G47/04C10G3/00
CPCC10G47/04C10G3/44C10G2300/10C10G2400/30C10G2300/44C10G2300/70C10G2300/1096Y02P30/20Y02P20/52
Inventor 王艳芹周浩陈璐郭勇刘晓晖龚学庆
Owner EAST CHINA UNIV OF SCI & TECH
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