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Method for producing light aromatic hydrocarbons by trimerization of acetylene

A technology of light aromatics and acetylene, applied in chemical instruments and methods, organic chemistry, hydrocarbons, etc., can solve problems such as environmental pollution

Active Publication Date: 2020-07-03
BEIJING HUAFU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, it can also reduce the production cost of the catalyst and effectively solve the environmental pollution problem caused by biomass incineration

Method used

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  • Method for producing light aromatic hydrocarbons by trimerization of acetylene
  • Method for producing light aromatic hydrocarbons by trimerization of acetylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] (1) Preparation of catalyst

[0076] The straw was dried and pulverized, and sent to a pyrolysis furnace for pyrolysis treatment. The pyrolysis temperature was 500° C., and the pyrolysis time was 2 hours. Put the biochar obtained by pyrolysis into 0.5mol / L dilute hydrochloric acid solution, and add dilute hydrochloric acid while stirring until the pH value of the solution no longer changes. The dilute hydrochloric acid-treated biochar was rinsed with distilled water until the solution was neutral, the washed biochar was obtained by filtration, and dried at 60° C. to obtain neutral biochar. At 850°C, use water vapor and neutral biochar to conduct water vapor activation treatment in reverse contact. The treatment time is 2 hours to obtain activated biochar. Measure the water absorption rate of the cooled activated biochar, and add ammonium heptamolybdate aqueous solution according to the water absorption rate. The activated biochar was impregnated for 4 hours, the loadin...

Embodiment 2

[0081] (1) Preparation of catalyst

[0082] The straw is dried and pulverized, and sent to a pyrolysis furnace for pyrolysis treatment. The pyrolysis temperature is 600° C., and the pyrolysis time is 1.5 h. Put the biochar obtained by pyrolysis into 0.5mol / L dilute hydrochloric acid solution, add dilute hydrochloric acid while stirring until the pH value of the solution no longer changes. The dilute hydrochloric acid-treated biochar was rinsed with distilled water until the solution was neutral, the washed biochar was obtained by filtration, and dried at 60° C. to obtain neutral biochar. At 700°C, water vapor was activated by reverse contact with neutral biochar, and the treatment time was 4 hours to obtain activated biochar. The water absorption of the cooled activated biochar was measured, and ferrous nitrate solution was added according to the water absorption. Activated biochar was subjected to impregnation treatment, the impregnation time was 4 hours, the iron loading wa...

Embodiment 3

[0087] (1) Preparation of catalyst

[0088] The straw is dried and pulverized and sent to a pyrolysis furnace for pyrolysis treatment. The pyrolysis temperature is 800° C. and the pyrolysis time is 1 h. Put the biochar obtained by pyrolysis into 0.5mol / L dilute hydrochloric acid solution, add dilute hydrochloric acid while stirring until the pH value of the solution no longer changes. The dilute hydrochloric acid-treated biochar was rinsed with distilled water until the solution was neutral, the washed biochar was obtained by filtration, and dried at 60° C. to obtain neutral biochar. At 950°C, water vapor is activated by reverse contact with neutral biochar. The treatment time is 1 hour to obtain activated biochar. Measure the water absorption rate of the cooled activated biochar, and add ammonium heptamolybdate aqueous solution according to the water absorption rate. The activated biochar was impregnated with nickel nitrate for 4 hours, the Ni and Mo loadings were 0.5% by we...

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Abstract

The invention discloses a method for producing a light aromatic hydrocarbon by acetylene trimerization. The method comprises the following steps: (1) loading a catalyst into a quartz tube reactor; (2)introducing hydrogen into the quartz tube reactor for reducing the catalyst; (3) purging the quartz tube reactor by utilizing nitrogen; and (4) introducing a mixed gas of acetylene and nitrogen intothe quartz tube reactor, and performing a polymerization reaction on the acetylene under the catalytic effect of the catalyst to generate the light aromatic hydrocarbon, wherein the catalyst is obtained by taking biological carbon obtained by biomass pyrolysis as a carrier, performing acidification treatment on the biological carbon, performing washing, performing drying, performing activation treatment, performing impregnation treatment and performing roasting treatment. In the method, the catalyst is prepared by taking the biological carbon as the carrier and is used for catalyzing acetylenetrimerization to produce the light aromatic hydrocarbon, so that the stability of the reaction activity can be maintained, conversion of the acetylene to a polymeric compound can be limited, and theyield of the light aromatic hydrocarbon can be obviously improved.

Description

technical field [0001] The invention belongs to the field of material chemical industry, in particular, the invention relates to a method for producing light aromatics by acetylene trimerization. Background technique [0002] Light aromatics such as benzene, toluene and xylene are one of the most important basic chemical raw materials, widely used in the production of chemical products such as rubber, fiber, plastic and dyes. At present, aromatics mainly come from catalytic reforming and hydrocarbon pyrolysis in petrochemical industry, but petroleum resources are becoming increasingly scarce. Therefore, it is imperative to develop other routes to produce light aromatics. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an object of the present invention is to propose a method for the production of light aromatics by trimerization of acetylene. In this method,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C2/48
Inventor 吴道洪许梅梅闫琛洋史学君
Owner BEIJING HUAFU ENG