Acetylene-hydrochlorinated low-content gold compound catalyst

A compound catalyst, acetylene hydrochlorination technology, applied in physical/chemical process catalysts, organic chemistry, hydrogen halide addition preparation, etc., can solve the problems of large consumption of mercury, environmental pollution, poor stability, etc., to reduce Effect of gold content, uniform impregnation, and uniform dispersion

Active Publication Date: 2013-07-10
XINJIANG TIANYE GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problems of using highly toxic mercury catalysts in the production of polyvinyl chloride by calcium carbide acetylene method, large consumption of mercury in production, serious environmental pollution, poor stability and high cost of existing precious metal catalysts, and further provides a A kind of good catalytic activity, high selectivity, low precious metal content (lower than 0.5%), a kind of low-content gold compound catalyst for acetylene hydrochlorination with low catalyst cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh Na 2 S 2 o 3 ﹒ 5H 2 O is 16.9485g, which is dissolved in 30ml of deionized water, stirred and set aside. Weigh 1.5839 g of chloroauric acid solution in a beaker, and add 10 ml of deionized water to this beaker for dilution. Reweigh AgNO 3 Add 0.6000g into the diluted chloroauric acid solution, stir evenly, add the standby sodium thiosulfate solution, and stir until there is no precipitation. Finally, 0.4500 g of KCL was weighed, added to the above solution and stirred. Add 15g of activated carbon to the above impregnation solution, stir evenly, impregnate at room temperature for 12 hours, and then dry at 105°C for 12 hours. This catalyst is used in the synthesis of vinyl chloride by acetylene hydrochlorination, in 12h -1 Under the condition of space velocity, dry with nitrogen gas at 180°C for 30 minutes, then pass through hydrogen chloride for activation for 30 minutes, and finally pass through acetylene to start the reaction. The conversion rate of acety...

Embodiment 2

[0030] Weigh Na 2 S 2 o 3 ﹒ 5H 2 O is 155.85g, which is dissolved in 30ml deionized water, stirred and set aside. Weigh 15.8390 g of the chloroauric acid solution in a beaker, and add 10 ml of deionized water to the beaker for dilution. Reweigh AgNO 3 Add 0.0750g into the diluted chloroauric acid solution, stir evenly, add spare sodium thiosulfate solution, and stir until there is no precipitation. Finally weigh 1.5000g of KCL, add it into the above solution and stir. Add 15g of activated carbon to the above impregnation solution, stir evenly, impregnate at room temperature for 12 hours, and then dry at 105°C for 12 hours. This catalyst is used in the synthesis of vinyl chloride by acetylene hydrochlorination, in 12h -1 Under the condition of space velocity, dry with nitrogen at 180°C for 30 minutes, then activate with hydrogen chloride for 30 minutes, and finally pass through acetylene to start the reaction. The conversion rate of acetylene is 99.8%, and the selec...

Embodiment 3

[0032] Weigh Na 2 S 2 o 3 ﹒ 5H 2 O is 5.0079g, which is dissolved in 30ml deionized water, stirred and set aside. Weigh 0.1584 g of the chloroauric acid solution in a beaker, and add 10 ml of deionized water to the beaker for dilution. Reweigh AgNO 3 Add 1.5000g into the diluted chloroauric acid solution, stir evenly, add spare sodium thiosulfate solution, and stir until no precipitation. Finally, 0.1500 g of KCL was weighed, added to the above solution and stirred. Add 15g of activated carbon to the above impregnation solution, stir evenly, impregnate at room temperature for 12 hours, and then dry at 105°C for 12 hours. This catalyst is used in the synthesis of vinyl chloride by acetylene hydrochlorination, in 12h -1 Under the condition of space velocity, dry with nitrogen at 180°C for 30 minutes, then pass through hydrogen chloride for activation for 30 minutes, and finally pass through acetylene to start the reaction. The conversion rate of acetylene is 45%, and the...

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Abstract

The invention discloses an acetylene-hydrochlorinated low-content gold compound catalyst, particularly a nonmerculic catalyst which is suitable for synthesis of chloroethylene through an acetylene hydrochlorination reaction. The catalyst comprises carrier active carbon, a main catalysis element and auxiliary elements A and B, wherein the content of the carrier active carbon is 10,000 parts, the main catalysis element is thiosulfate of gold with the content of 1-120 parts, the auxiliary element A is thiosulfate of silver with the content of 50-1,000 parts, the auxiliary element B is alkali metal compound and a mixture of the alkali metal compounds with the content of 50-1,000 parts. According to the acetylene-hydrochlorinated low-content gold compound catalyst disclosed by the invention, the content of gold in the prepared gold compound catalyst is low; the cost of noble metal catalyst is remarkably reduced; the prepared gold compound catalyst is a good-activity, strong-stability and high-selectivity novel nonmerculic catalyst; and the acetylene-hydrochlorinated low-content gold compound catalyst has the advantages of simple production process, short production period and environment-friendliness.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst suitable for synthesizing vinyl chloride by hydrochlorination of acetylene. Background technique [0002] Vinyl chloride monomer is an important synthetic raw material for polyvinyl chloride. Polyvinyl chloride is one of the synthetic resins with the largest consumption and output in my country. However, the basic national conditions of our country, which has more coal and less oil, determine that the production of vinyl chloride by acetylene hydrochlorination is still in my country. occupy a dominant position. The main problems facing the synthesis of vinyl chloride by acetylene hydrochlorination are the environmental pollution caused by the use of mercury catalysts and the large consumption of mercury resources. With the increasing awareness of environmental protection and the increasingly tense negotiations on the international mercury restriction treaty, in order to maintain the livin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/10C07C21/06C07C17/08
Inventor 郑伟玲胡文虎王伟徐云鹏王小艳夏锐李静张传彩庞晓东谢东阳谢金重王小昌周佳赵忠峰李春华李国栋陈万银李铭芝
Owner XINJIANG TIANYE GRP
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