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Acetylene hydrochlorination catalyst based on porous tube wall hollow foam material and preparation method and application of acetylene hydrochlorination catalyst

A technology for acetylene hydrochlorination and foam materials, which is applied in the field of acetylene hydrochlorination reaction catalysts and preparations, and can solve the problems that the mass transfer and heat transfer processes cannot be finely regulated.

Active Publication Date: 2019-05-14
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a catalyst for acetylene hydrochlorination based on a porous tube wall hollow foam material and its preparation method, which solves the problems in the prior art that the process of mass transfer and heat transfer cannot be finely regulated.

Method used

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  • Acetylene hydrochlorination catalyst based on porous tube wall hollow foam material and preparation method and application of acetylene hydrochlorination catalyst
  • Acetylene hydrochlorination catalyst based on porous tube wall hollow foam material and preparation method and application of acetylene hydrochlorination catalyst
  • Acetylene hydrochlorination catalyst based on porous tube wall hollow foam material and preparation method and application of acetylene hydrochlorination catalyst

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Experimental program
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Embodiment 1

[0067] The hollow foam activated carbon material with porous structure microchannel tube wall is used as the carrier, the average size of the macroscopic three-dimensional interconnected openings is 3mm, the average size of the outer diameter of the hollow microchannel is 1mm, the average size of the inner diameter is 500μm, and the pores contained in the tube wall body The average pore size is 1 μm, and the porosity is 10%. The hollow foam activated carbon material is impregnated in the chloroauric acid solution, and after drying, the acetylene hydrogen based on the porous wall hollow foam material is uniformly loaded with the gold trichloride catalytic active component on the hollow microchannel pipe wall body with a porous structure. Chlorination reaction catalyst, wherein the gold content is 0.001wt%-1wt%. The catalyst is applied to the acetylene hydrochlorination reaction, and the mixed gas of acetylene and hydrogen chloride is simultaneously introduced into the hollow mi...

Embodiment 2

[0069] The hollow foam material with porous structure microchannel wall is used as the carrier, and the average size of the macroscopic three-dimensional interconnected openings is 3mm, the average size of the outer diameter of the hollow microchannel is 1mm, and the average size of the inner diameter is 1mm. The size is 500 μm, the average pore diameter of the pores contained in the tube wall body is 1 μm, and the porosity is 10%. The hollow foam (activated carbon-molecular sieve) material is impregnated in the chloroauric acid solution, and after drying, it is made into a hollow foam based on a porous tube wall that uniformly loads gold trichloride catalytically active components on the hollow microchannel tube wall body with a porous structure. The material is an acetylene hydrochlorination reaction catalyst, wherein the gold content is 0.001wt%-1wt%. The catalyst is applied to the acetylene hydrochlorination reaction, and the mixed gas of acetylene and hydrogen chloride is...

Embodiment 3

[0071]The hollow foamed silicon nitride material with a porous structure microchannel wall is used as the carrier, the average size of the macroscopic three-dimensional interconnected openings is 4mm, the average size of the outer diameter of the hollow microchannel is 1.5mm, and the transverse section of the cavity in the hollow microchannel The surface is a rectangle of 200 μm×300 μm, the average pore diameter of the pores contained in the tube wall body is 1 μm, and the porosity is 20%. The operation of "dipping slurry-removing excess slurry-semi-drying" is carried out by circulation to load the second carrier coating on the outside of the hollow microchannel tube wall, the composition is 90wt% activated carbon + 10wt% graphene, and the coating thickness is 80 μm. Then the sample is impregnated in the chloroauric acid solution, and after drying, it is made into a hollow microchannel wall with a porous structure. A gold trichloride catalytic active coating is loaded on the ou...

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Abstract

The invention relates to the field of catalysts, in particular to an acetylene hydrochlorination catalyst based on a porous tube wall hollow foam material and a preparation method and application of the acetylene hydrochlorination catalyst. The acetylene hydrochlorination catalyst is characterized in that the first carrier of the catalyst contains the porous tube wall hollow foam material, the material is macroscopically built by a three-dimensional-communicated support framework network, the support frameworks are three-dimensional-communicated hollow micro-channels, and the tube walls of themicro-channels contain porous structures with angstrom-scale and / or nanoscale and / or micron-scale pores. The acetylene hydrochlorination catalyst prepared by the preparation method has the advantagesthat high-dispersity controllable loading of catalytic active components, catalysis-assisting components and a second carrier used by acetylene hydrochlorination can be achieved in the various-dimension pores of the porous tube wall hollow foam material, heat transfer and mass transfer in the reaction can be intensified, and the service life of the catalyst can be prolonged.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a catalyst for acetylene hydrochlorination based on a porous tube wall hollow foam material, a preparation method and an application. Background technique [0002] The reaction of acetylene hydrochlorination to vinyl chloride is still one of the important links in my country's chlor-alkali industry. Due to the resource endowment constraints of rich coal, poor oil, and little gas, the production process of vinyl chloride monomer is mainly based on the calcium carbide method. At present, the catalyst used in acetylene hydrochlorination is HgCl / C particle catalyst. Since the acetylene hydrochlorination reaction is an exothermic reaction, the temperature rise of the catalyst bed is highly related to the reaction space velocity and the heat transfer conditions of the bed, so it is inevitable to face the problems of thermal deactivation and volatilization loss of the mercury catalyst, resultin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/10B01J27/24B01J27/19B01J29/00B01J35/10B01J32/00C07C17/08C07C21/06
Inventor 张劲松杨晓丹王鹏高勇杨振明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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