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A gold catalyst modified with sulfur-containing silane coupling agent for acetylene hydrochlorination

A technology of sulfur-silane coupling agent and catalyst, which is applied in the field of sulfur-containing silane coupling agent-modified gold catalyst and its preparation, can solve the problems that the stability of gold-based catalyst hinders industrial application, catalyst deactivation, etc., and achieves a simple and efficient preparation process. Convenience and safety, solve environmental problems, increase the effect of stability

Active Publication Date: 2021-10-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since cationic gold is easily reduced and agglomerated, the catalyst will be deactivated.
Therefore, the stability of gold-based catalysts is the primary problem hindering their industrial application.

Method used

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  • A gold catalyst modified with sulfur-containing silane coupling agent for acetylene hydrochlorination
  • A gold catalyst modified with sulfur-containing silane coupling agent for acetylene hydrochlorination
  • A gold catalyst modified with sulfur-containing silane coupling agent for acetylene hydrochlorination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 catalyst preparation

[0039] Weigh 3.3g of bis-[3-(triethoxysilyl)propyl]-disulfide and dissolve it in 35ml of dimethyl sulfoxide, add a certain amount of sodium hydroxide solution (1mol / L) to adjust the pH of the solution to 13, the above solution was added dropwise into a beaker containing 50 g of activated carbon, and stirred at a temperature of 100°C for 15 hours, and the stirred activated carbon obtained was washed with a large amount of water until it was neutral, and then centrifuged and filtered , drying and other steps to obtain activated carbon modified with sulfur-containing silane coupling agent; weigh 1.35g of chloroauric acid and dissolve it in 200ml of chloroform to obtain an impregnation solution containing chloroauric acid; take 48.65g of the prepared sulfur-containing silane coupling agent The activated carbon modified by the agent is soaked in the impregnating solution containing chloroauric acid; the soaked activated carbon is centrifug...

Embodiment 2

[0040] Embodiment 2 catalyst preparation

[0041]Weigh 2.9g of bis-[3-(triethoxysilyl)propyl]-tetrasulfide and dissolve it in 35ml of ether, add a certain amount of sodium hydroxide solution (1mol / L) to adjust the pH of the solution to 11~ 13. Add the above solution dropwise into a beaker containing 50g of activated carbon, and stir for 17 hours at a temperature of 35°C. The stirred activated carbon obtained is washed with a large amount of water until it is neutral, and then centrifuged, filtered, Steps such as drying obtain the activated carbon modified by the sulfur-containing silane coupling agent; weigh 0.75g of chloroauric acid and dissolve it in 200ml of acetone to obtain an impregnating solution containing chloroauric acid; take 49.25g of the prepared sulfur-containing silane coupling agent The modified activated carbon is soaked in the impregnating solution containing chloroauric acid; the soaked activated carbon is centrifuged, filtered and then dried to finally obta...

Embodiment 3

[0042] Embodiment 3 catalyst preparation

[0043] Weigh 2.9g of bis-[3-(triethoxysilyl)propyl]-tetrasulfide and dissolve it in 35ml of dichloroethane, add a certain amount of sodium hydroxide solution (1mol / L) to adjust the pH of the solution to 13, the above solution was added dropwise into a beaker containing 50 g of activated carbon, and stirred at a temperature of 80°C for 17 hours, and the stirred activated carbon obtained was washed with a large amount of water to neutrality, and then centrifuged and filtered , drying and other steps to obtain activated carbon modified with sulfur-containing silane coupling agent; weigh 0.75g of chloroauric acid and dissolve it in 200ml of acetone to obtain an impregnating solution containing chloroauric acid; take 49.25g of the prepared sulfur-containing silane coupling agent The activated carbon modified by the agent is soaked in the impregnating solution containing chloroauric acid; the soaked activated carbon is centrifuged, filtered...

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Abstract

The invention discloses a gold-based catalyst modified by a sulfur-containing silane coupling agent and its preparation method and application. The ions account for 0.1% to 3% of the weight of the catalyst. The preparation of the catalyst is mainly divided into two steps: 1) modifying the sulfur-containing silane coupling agent to the surface of activated carbon; 2) using chloroauric acid as a precursor, selecting a suitable solvent to load it by stirring, centrifuging, filtering and drying onto the sulfur-silane-modified activated carbon synthesized in step 1) to obtain the gold-based catalyst modified by the sulfur-containing silane coupling agent. The gold-based catalyst modified by the sulfur-containing silane coupling agent prepared by the present invention is used in the hydrochlorination of acetylene, and exhibits good catalytic activity and vinyl chloride selectivity and excellent stability. Catalysts for acetylene hydrochlorination with industrial application potential.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a sulfur-containing silane coupling agent-modified gold catalyst used for acetylene hydrochlorination to synthesize vinyl chloride and a preparation method thereof. Background technique [0002] Polyvinyl chloride is one of the three general-purpose plastics, which plays an important role in production and life, especially in my country, where the output of polyvinyl chloride accounts for the most in the world. Vinyl chloride is the most important monomer for the synthesis of polyvinyl chloride. At present, the production of vinyl chloride is mainly divided into ethylene method and acetylene method according to different sources of raw materials. In view of my country's energy pattern of "rich coal, poor oil, and little gas", my country's production of vinyl chloride The acetylene method is mainly used. At present, this method mainly uses activated carbon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C07C21/06C07C17/08
CPCB01J31/226B01J2231/32B01J2531/18C07C17/08C07C21/06
Inventor 黄家辉孙玺张健姜封庆
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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