Three-component mercury-free catalyst for hydrochlorination of acetylene and preparation method of catalyst

A technology of acetylene hydrochlorination and mercury catalyst, which is applied in the direction of physical/chemical process catalysts, hydrogen halide addition preparation, chemical instruments and methods, etc. It can solve the problems of high gold loading, difficulty to overcome, poor stability, etc., and achieve reaction Low temperature, reduced hot spots, good stability

Active Publication Date: 2018-05-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the purposes of the present invention is to solve the problem of environmental pollution caused by the use of highly toxic mercury catalysts in the production of polyvinyl chloride by the calcium carbide acetylene method; the second purpose is to solve the problems of high gold loading and high cost of current activated carbon-loaded gold catalysts; The third purpose is to solve the problems that the current acetylene hydrochlorination reaction catalyst has poor stability, short life, and the phenomenon of overheating in the reaction process is difficult to overcome.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 1.05g of chloroauric acid solution in a beaker, add 13.0g of deionized water and stir evenly, then add 10g of coconut shell charcoal into the above solution, stir evenly, dry at room temperature for 12h, and then dry at 300°C for 2h, That is, a mercury-free catalyst is obtained.

[0024] Use this catalyst for acetylene hydrochlorination reaction, when the acetylene space velocity is 30h -1 , when the reaction temperature is 150°C, the conversion rate of acetylene is 85%, and the selectivity of vinyl chloride is 98%.

Embodiment 2

[0026] Weigh 1.27g of CuCl 2 2H 2 O in a beaker, add 13.0g of deionized water to dissolve and stir; then weigh 1.05g of chloroauric acid solution in the beaker, then mix and stir the above two solutions; finally add 10g of coconut shell charcoal to the above mixture , stirred evenly, dried at room temperature for 12 hours, and then dried at 300°C for 2 hours to obtain a mercury-free catalyst.

[0027] Use this catalyst for acetylene hydrochlorination reaction, when the acetylene space velocity is 30h -1 , when the reaction temperature is 100°C, the conversion rate of acetylene is 98%, the selectivity of vinyl chloride is 95%, and the conversion rate of acetylene begins to decrease after 100 hours of reaction.

Embodiment 3

[0029] Weigh 1.27g of CuCl 2 2H 2 O in a beaker, add 6.0g of deionized water to dissolve and stir; then weigh 1.0g of cesium chloride in a beaker, add 7.0g of deionized water to dissolve and stir; then weigh 1.05g of chloroauric acid solution in In a beaker, mix and stir the above three solutions; finally add 10g of coconut shell charcoal to the above mixture, stir evenly, dry at room temperature for 12 hours, and then dry at 300°C for 2 hours to obtain a mercury-free catalyst.

[0030] Use this catalyst for acetylene hydrochlorination reaction, when the acetylene space velocity is 30h -1 , when the reaction temperature is 120 DEG C, the conversion rate of acetylene is 99%, the selectivity of vinyl chloride is 98%, and the conversion rate of acetylene and the selectivity of vinyl chloride remain unchanged after 500 hours of reaction.

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PUM

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Abstract

The invention discloses a mercury-free catalyst for hydrochlorination of acetylene and a preparation method of the catalyst. The catalyst contains carrier activated carbon and an active component which is a mixture of three components, wherein the component A is chloroauric acid, the component B is copper chloride, the component C is one of sodium chloride, potassium chloride, rubidium chloride, cesium chloride, magnesium chloride, calcium chloride, cerium chloride and barium chloride, the weight percentage of a gold element in the component A and the carrier is 0.01%-0.1%, the weight percentage of copper chloride in the component B and the carrier is 0.5%-20%, and the weight percentage of the component C and the carrier is 1%-30%. The active component is supported on the carrier through equivalent-volume impregnation, and the novel mercury-free catalyst is obtained with a drying means. The catalyst has very high activity, selectivity and better stability in the reaction for preparingvinyl chloride through hydrochlorination of acetylene.

Description

technical field [0001] The invention relates to a mercury-free catalyst which can be used for acetylene hydrochlorination and a preparation method thereof, and belongs to the field of catalysts and preparations in chemical production. Background technique [0002] As one of the five general-purpose plastics, PVC plays an important role in national economic construction and is widely used in various industries such as automobiles, building materials, pipes, wires and cables, toys, and food packaging. Acetylene method (acetylene hydrochlorination method), ethylene method and ethane method are the main methods for industrially synthesizing vinyl chloride monomer. my country's basic national conditions of "more coal, less gas, and less oil" determine that the acetylene method has become the mainstream process for the synthesis of vinyl chloride monomer in my country. At present, the catalyst used in the industrial acetylene process is activated carbon-supported mercuric chlorid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/122B01J27/138C07C17/08C07C21/06
CPCB01J27/122B01J27/138C07C17/08C07C21/06
Inventor 刘广业宋智甲庞晓东徐云鹏刘中民周军宋晓玲
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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