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Carbon-material supported catalyst for acetylene hydrochlorinate reaction

A technology for acetylene hydrochlorination and catalysts, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, catalyst carriers, etc., can solve problems that have not been seen yet, and achieve carbon material carrier pretreatment Simple device, small load, and easy operation

Inactive Publication Date: 2014-01-08
XINJIANG UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Literature [Li Xiaoyan, Zhu Mingyuan, Dai Bin. Aucl 3 on polypyrrole-modified carbon nanotubes as acetylene hydrochlorination catalysts[J]. Applied Catalysis B: Environmental, 2013,142-143:234-240] reported catalysts with noble metal Au as the active component and carbon nanotubes as the carrier. In addition, there is no further research on carbon materials as carriers, noble metals and non-noble metals as active components and additives for acetylene hydrochlorination in open literature and patents.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh the dried graphene after a certain treatment, impregnate the quantitative palladium salt impregnation solution and alkali metal (such as Na, K, Al, etc.) additives on the above-mentioned graphene, and use ultrasonic or rotary evaporation to impregnate and dry, and the obtained catalyst The loading amount of the metal content on the carrier is 0.01-4wt%.

[0016] The above catalyst was loaded into a fixed bed reactor (quartz glass material). At a feed gas space velocity of 120 h -1 , the raw gas ratio is V(HCl):V(C 2 h 2 ) = 1.2:1, normal pressure, and reaction temperature of 180 °C, the catalyst was tested for acetylene hydrochlorination reaction activity, and the reaction tail gas was analyzed. The conversion rate of acetylene of the catalyst was 96.25%, and the selectivity of vinyl chloride was 99.33%.

Embodiment 2

[0018] Weigh the dried carbon fiber after a certain treatment, impregnate the quantitative palladium salt impregnation solution and alkaline earth metal (such as Be, Mg, Ba, etc.) additives on the above carbon nanotubes, and use ultrasonic or rotary evaporation to impregnate and dry. The loading amount of the metal content on the carrier is 4-8wt%.

[0019] The above catalyst was loaded into a fixed bed reactor (quartz glass material). At a feed gas space velocity of 120 h -1 , the raw gas ratio is V(HCl):V(C 2 h 2 ) = 1.2:1, normal pressure, and the reaction temperature of 180 °C to test the activity of acetylene hydrochlorination reaction of the catalyst, and analyze the reaction tail gas. The conversion rate of acetylene of the catalyst is 97.32%, and the selectivity of vinyl chloride is 99.57%.

Embodiment 3

[0021] Weigh the dried carbon nanotubes after a certain treatment, impregnate the quantitative palladium salt impregnation solution and rare earth metal (such as La, Ce, Lu, etc.) additives on the above carbon nanotubes, and use ultrasonic or rotary evaporation to impregnate and dry, the catalyst The loading amount of the metal content in the carrier is 8-12wt%.

[0022] The above catalyst was loaded into a fixed bed reactor (quartz glass material). At a feed gas space velocity of 120 h -1 , the raw gas ratio is V(HCl):V(C 2 h 2 ) = 1.2:1, normal pressure, and reaction temperature of 180 °C, the catalyst was tested for acetylene hydrochlorination reaction activity, and the reaction tail gas was analyzed. The acetylene conversion rate of the catalyst was 96.51%, and the vinyl chloride selectivity was 99.28%.

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Abstract

The invention relates to a carbon-material supported catalyst for an acetylene hydrochlorinate reaction. The catalyst mainly comprises active components and a supporter, the active components of the catalyst are palladium chloride, the loading capacity of the active components is 0.01-15wt%, and the supporter of the catalyst is one of a carbon nano tube, carbon fibers, graphene and other carbon materials. The supporters of the catalyst is prepared by adopting an in-situ chemical oxidative polymerization pretreatment method and a soaking method, and the activity of the catalyst is evaluated and tested under the condition that the feed gas space speed is 120h-1, the feed gas proportion is that V(HC1):V(C2H2)=1-2, pressure is normal, and reaction temperature is 100-200 DEG C. The carbon-material supported catalyst has the advantages that the prepared catalyst is environmentally friendly, the components of the catalyst are simple and stable, and the catalytic activity is high; the conversion percent of acetylene is larger than 96%, and the selectivity of chloroethylene can reach more than 99%.

Description

technical field [0001] The invention relates to a loaded mercury-free catalyst that can be used in acetylene hydrochlorination, a preparation method and application thereof, and belongs to the field of catalyst preparation technology and application in organic synthesis. Background technique [0002] Acetylene hydrochlorination is an important chemical reaction for the synthesis of vinyl chloride (VCM) monomer. Vinyl chloride is an important monomer for the synthesis of polyvinyl chloride (PVC). As one of the world's top five engineering materials, polyvinyl chloride is widely used in industry, agriculture, construction, and daily life, and is in great demand worldwide. [0003] At present, the industrial production of vinyl chloride monomer mainly includes: acetylene method and ethylene method. The ethylene method belongs to the petrochemical route. Due to the national conditions of poor oil and rich coal, the acetylene method plays a leading role in the production of vin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J32/00B01J21/18B01J35/02B01J35/06C07C21/06C07C17/08B01J23/58B01J23/63B01J23/656B01J23/89B01J35/00
Inventor 王丰苏卜顺王吉德赵永禄杨东郝涛
Owner XINJIANG UNIVERSITY
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