Method for preparing benzene and co-producing ethylene from acetylene

An acetylene and ethylene technology, applied in the field of acetylene to prepare benzene and co-production of ethylene, can solve the problems of complex catalyst preparation, difficult heat transfer, harsh process conditions, etc., achieve adjustable product selectivity, avoid complex preparation, and overcome difficulties in heat transfer. Effect

Inactive Publication Date: 2016-09-28
BEIJING HUAFU ENG
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Problems solved by technology

For this reason, an object of the present invention is to propose a kind of method that acetylene prepares benzene and co-produces ethylene, and this method solves the multiple problems that exist in the prior art by coupling multiple reactions, for example, avoids the alkyne aromatic The defects of complex catalyst preparation, poor selectivity, harsh process conditions, easy carbon deposition and the need to use toxic solvents in the structuring reaction; overcome the difficulties of heat removal in the high-concentration acetylene hydrogenation process, and the problems of easy production of green oil that cause catalyst deactivation, thus Benzene and ethylene can be prepared at the same time, and has the advantages of simple process, easy temperature control, and adjustable product selectivity, suitable for large-scale production

Method used

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  • Method for preparing benzene and co-producing ethylene from acetylene

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Embodiment 1

[0048] Mix acetylene, hydrogen, methane, water vapor and carbon dioxide to obtain raw material gas, wherein the molar ratio of acetylene, hydrogen and methane in the raw material gas is 1:3:2, the water vapor content in the raw material gas is 100-2000ppm, and the carbon dioxide is 1000ppm; the average pressure of the raw material gas is 0.75MPa, the temperature of the raw material gas is 35°C, and then the raw material gas is supplied to the tubular fixed bed filled with catalyst, and the part of the tubular fixed bed that is in contact with the raw material gas is made of enamel material. Among them, the catalyst is prepared by the impregnation method, the particle size is 20-40 mesh, the active components are palladium, copper and nickel, the loading capacity is 0.05wt% of the carrier, the catalyst carrier is a glass fiber mesh, and the reactor operating space velocity is 3000h -1 , the reaction temperature is 450°C to carry out the reaction to obtain a reaction material co...

Embodiment 2

[0050] Mix acetylene, hydrogen, methane, water vapor and carbon dioxide to obtain a raw material gas, wherein the molar ratio of acetylene to hydrogen and methane in the raw material gas is 1:1:4, the water vapor content in the raw material gas is 1000ppm, and the carbon dioxide is 500ppm. The average pressure of the raw material gas is 0.55MPa, the temperature of the raw material gas is 80°C, and then the raw material gas is supplied to the moving bed filled with catalyst, and the part in contact with the raw material gas in the moving bed is made of ceramic material, wherein the catalyst is prepared by impregnation method The particle size is 5-8mm, the active component metals are palladium, copper, iron and nickel, the loading capacity is 0.04wt% of the carrier, and the catalyst carrier is α-Al 2 o 3 , the reactor operating space velocity is 2000h -1 , the reaction temperature is 650°C, and the reaction is carried out to obtain a reaction material containing benzene, ethyl...

Embodiment 3

[0052] Mix acetylene, hydrogen, methane, water vapor, carbon dioxide, carbon monoxide, and ethane to obtain raw material gas, wherein the molar ratio of acetylene, hydrogen and methane in the raw material gas is 1:3.5:1, and the water vapor content in the raw material gas is 2000ppm , carbon dioxide is 1000ppm, carbon monoxide is 500ppm, ethane is 200ppm, temperature; feed gas average pressure is 0.45MPa, feed gas temperature is 30°C. Then the raw material gas is supplied to the fluidized bed filled with catalyst, and the part in contact with the raw material gas in the fluidized bed is made of graphite material, wherein, the catalyst is prepared by impregnation method, the particle size is 20-40 mesh, and the active component The metal is palladium, copper and nickel, the load is 0.05wt% of the carrier, the catalyst carrier is glass beads, and the reactor operating space velocity is 3000h -1 , the reaction temperature is 750°C, and the reaction is carried out to obtain a reac...

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Abstract

The invention discloses a method for preparing benzene and co-producing ethylene from acetylene. The method comprises the following steps: (1) mixing the acetylene, hydrogen, methane and steam to obtain feed gas; (2) supplying the feed gas to a reactor with a catalyst for reaction; (3) performing separation treatment on a material obtained by reaction in step (2) to obtain the benzene and the ethylene. According to the method, multiple reactions are coupled, so that the shortcomings of complexity in catalyst preparation, poor selectivity, harsh process conditions, high carbon deposition rate and requirements on use of a toxic solvent during alkyne aromatization reaction are overcome, the problem of high catalyst deactivation rate caused by heat transfer difficulty and high green oil production rate of a high-concentration acetylene hydrogenation process is solved, and the benzene and the ethylene can be prepared at the same time; moreover, the method has the advantages of simple process, easiness for temperature control and product selectivity adjustability, and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of chemical industry. Specifically, the invention relates to a method for preparing benzene and co-producing ethylene from acetylene. Background technique [0002] Both benzene and ethylene are important petrochemical raw materials, and their downstream products are widely used in the fields of environment, energy, industry, and biology. However, ethylene is mainly produced by the cracking of petroleum hydrocarbons, and benzene is mainly extracted from petroleum products. my country is rich in coal, lacks oil and gas, and is highly dependent on foreign oil. This poses a serious strategic threat to our country, which is not rich in oil reserves. Therefore, seeking another new source and process to prepare bulk basic chemical raw materials—benzene and ethylene, and replacing petroleum as raw materials in the field of industrial production can largely alleviate my country's dependence on petroleum. [0003] W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/04C07C2/48C07C11/04C07C5/09
CPCY02P20/52C07C2/48C07C5/09C07C15/04C07C11/04
Inventor 吴道洪余海鹏史雪君苏二强刘周恩吴黎阳
Owner BEIJING HUAFU ENG
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