Method for preparing chloroethylene by catalytic reforming

A technology for catalytic reforming and vinyl chloride, applied in chemical instruments and methods, preparation of halogenated hydrocarbons, physical/chemical process catalysts, etc., can solve the problems of low raw material cost, high equipment requirements, and inability to solve mercury, so as to reduce synthesis Combined with refining process, solving the problem of high temperature energy consumption, and solving the effect of mercury pollution

Inactive Publication Date: 2010-09-01
ZHONGKE YIGONG SHANGHAI CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the ethylene method has a long process flow, high equipment requirements, and large investment, but because of the low cost of raw materials and no mercury pollution, this method is basically adopted abroad
There are also a small number of factories in China that adopt the combined production process, that is, th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dissolve 1g of barium chloride in 150ml of water, add 100g of activated carbon, mix well, and dry at 180°C to prepare the catalyst. Mix acetylene and ethylene dichloride steam at a ratio of 1:4, and pass it into a reactor equipped with a catalyst supported by activated carbon for reaction. The reaction temperature is controlled at 320 ° C, and the reaction time is 5 minutes. After the reaction, the gas is cooled to room temperature. The liquid unreacted ethylene dichloride is separated first, and then the remaining gas is frozen and compressed to obtain liquid vinyl chloride. Calculated by acetylene, the primary conversion rate is over 70%, and the selectivity of vinyl chloride is over 90%.

Embodiment 2

[0022] Dissolve 5g of barium chloride in 150ml of water, add 100g of activated carbon, mix well, and dry at 150°C to obtain the catalyst. Mix acetylene and ethylene dichloride steam at a ratio of 1:3, and pass it into a reactor equipped with a catalyst supported by activated carbon for reaction. The reaction temperature is controlled at 300°C, and the reaction time is 10 minutes. After the reaction, the gas is cooled to room temperature. The liquid unreacted ethylene dichloride is separated first, and then the remaining gas is frozen and compressed to obtain liquid vinyl chloride. Calculated by acetylene, the primary conversion rate is over 70%, and the selectivity of vinyl chloride is over 92%.

Embodiment 3

[0024] Dissolve 10g of barium chloride in 150ml of water, add 100g of activated carbon, mix well and dry at 250°C to obtain the catalyst. Mix acetylene and ethylene dichloride vapor at a ratio of 1:2, and pass it into a reactor equipped with a catalyst supported by activated carbon for reaction. The reaction temperature is controlled at 280°C, and the reaction time is 2 minutes. After the reaction, the gas is cooled to room temperature. The liquid unreacted ethylene dichloride is separated first, and then the remaining gas is frozen and compressed to obtain liquid vinyl chloride. Calculated by acetylene, the primary conversion rate is over 70%, and the selectivity of vinyl chloride is over 95%.

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PUM

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Abstract

The invention discloses a method for preparing chloroethylene by catalytic reforming, which relates to a method for preparing the chloroethylene. The method comprises: a step of preparing a catalyst by using active carbon as a carrier, in which a barium salt is used as a catalyst, the active carbon is used as the catalyst carrier, and the barium salt is dissolved in water, absorbed by the active carbon and dried to obtain the catalyst carried by the active carbon; and a step of synthesizing the chloroethylene, in which acetylene gas and dichloroethane vapour are mixed and introduced to a reactor containing the catalyst carried by the active carbon to react, the reaction effluent is cooled to room temperature, unreacted dichloroethane is condensed to be separated out, and the remaining gas is compressed and frozen to give liquid chloroethylene. In the invention, a mercury free catalyst is adopted, the mercury pollution of the chloroethylene production industry is eliminated, and the reaction is performed spontaneously with little energy consumption.

Description

technical field [0001] The invention relates to a method for preparing vinyl chloride, in particular to a method for preparing vinyl chloride by catalytic reforming of acetylene and ethylene dichloride. Background technique [0002] At present, the industrial production methods of vinyl chloride mainly include ethylene method and acetylene method. [0003] Ethylene method: using ethylene as raw material, chlorination reaction with chlorine to produce dichloroethane, dichloroethane is thermally decomposed to produce vinyl chloride and hydrogen chloride; hydrogen chloride and oxygen react with ethylene to produce dichloroethylene alkyl. The main reaction consists of the following 3 units: [0004] (1)CH 2 =CH 2 +Cl 2 →C 2 h 4 Cl 2 [0005] (2)C 2 h 4 Cl 2 →C 2 h 3 Cl+HCl [0006] (3) 2C 2 h 4 +O 2 +4HCl→2C 2 h 4 Cl 2 +2H 2 o [0007] Acetylene method: direct synthesis of vinyl chloride by acetylene and hydrogen chloride under the action of mercuric chlor...

Claims

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Application Information

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IPC IPC(8): C07C21/06C07C17/358B01J27/138
Inventor 姜标钟劲光
Owner ZHONGKE YIGONG SHANGHAI CHEM TECH CO LTD
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