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Nickel phosphide catalyst for producing vinyl chloride by acetylene hydrochlorination method and preparation method thereof

A technology of acetylene hydrochlorination and catalyst, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, hydrogen halide addition preparation, etc., can solve problems such as mercury pollution, and achieve simple production process, good activity and selectivity, The effect of short production cycles

Active Publication Date: 2011-08-17
内蒙古海驰高科新材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The biggest disadvantage of the preparation of vinyl chloride by acetylene hydrochlorination is the pollution of mercury

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] First, 4.12g of nickel chloride and 3.64g of sodium hypophosphite were dissolved in 33.75g of deionized water under stirring at room temperature, then the solution was vacuum impregnated into 23g of activated carbon carrier, and dried at 80°C; then The dried precursor is loaded into the reactor, roasted at 200° C. for 60 min in a nitrogen atmosphere, and dropped to room temperature in a nitrogen atmosphere to obtain a catalyst precursor; finally, 20 g of BaCl with a concentration of 5% 2 The solution was vacuum impregnated into the precursor and dried at 120 °C. The resulting sample was named A. Catalyst A is used in the reaction of preparing vinyl chloride by hydrochlorination of acetylene, the conversion rate of acetylene is 64% at 150°C, and the selectivity of vinyl chloride is 53%.

Embodiment 2

[0012] The preparation process is the same as that of catalyst A, except that the amount of sodium hypophosphite is changed to 2.73 g, and other conditions remain unchanged, and the obtained sample is named B. Catalyst B is used in the reaction of preparing vinyl chloride by hydrochlorination of acetylene, the conversion rate of acetylene is 65% at 150°C, and the selectivity of vinyl chloride is 53%.

Embodiment 3

[0014] The preparation process is the same as that of Catalyst A, except that the calcination temperature of the precursor is changed to 400°C, and other conditions remain unchanged. The obtained sample is named C. Catalyst C is used in the reaction of preparing vinyl chloride by hydrochlorination of acetylene, the conversion rate of acetylene is 52% at 150°C, and the selectivity of vinyl chloride is 44%.

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PUM

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Abstract

The invention provides a nickel phosphide catalyst for producing vinyl chloride by an acetylene hydrochlorination method and a preparation method thereof. The novel mercury-free catalyst with certain activity can be obtained by using Ni2P as an active center, using active carbon as a carrier and adding auxiliary agents; and the catalyst provided by the invention has the advantages of simple production process, short production period, environmental friendliness, low cost and the like. The catalyst shows good activity and selectivity in the reaction of preparing the vinyl chloride by acetylenehydrochlorination.

Description

technical field [0001] The invention proposes a nickel phosphide catalyst used in the production of vinyl chloride by acetylene hydrochlorination and a preparation method thereof. The catalyst is Ni 2 P is the active center, activated carbon is used as the carrier, and a new type of mercury-free catalyst with certain activity can be obtained by adding additives; the catalyst proposed by the invention has the advantages of simple production process, short production cycle, environmental protection, and low cost. The catalyst shows good activity and selectivity in the reaction of acetylene hydrochlorination to vinyl chloride. Background technique [0002] Vinyl chloride is an important monomer for the synthesis of polyvinyl chloride (PVC). With the continuous development and expansion of the PVC industry, its demand is increasing day by day. Under the decision of my country's energy structure environment of "lack of oil, poor gas, and rich coal", the preparation of vinyl ch...

Claims

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Application Information

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IPC IPC(8): B01J27/185C07C21/06C07C17/08
Inventor 李伟段琼关庆鑫
Owner 内蒙古海驰高科新材有限公司
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