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
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[0009] Example one:
[0010] First, dissolve 4.12g of nickel chloride and 3.64g of sodium hypophosphite in 33.75g of deionized water under stirring at room temperature, then vacuum immerse the solution into 23g of activated carbon carrier and dry at 80°C; The dried precursor was put into the reactor, calcined in a nitrogen atmosphere at 200°C for 60 minutes, and then dropped to room temperature in a nitrogen atmosphere to obtain a catalyst precursor; finally, 20g of BaCl with a concentration of 5% 2 The solution was vacuum immersed into the precursor and dried at 120°C. The resulting sample was named A. Catalyst A is used in the reaction of acetylene hydrochlorination to prepare vinyl chloride. The acetylene conversion rate at 150°C is 64%, and the vinyl chloride selectivity is 53%.
Example Embodiment
[0011] Embodiment two:
[0012] The preparation process is the same as that of catalyst A, except that the amount of sodium hypophosphite is changed to 2.73g, other conditions are unchanged, and the obtained sample is named B. Catalyst B is used in the reaction of acetylene hydrochlorination to prepare vinyl chloride. The acetylene conversion rate at 150° C. is 65%, and the vinyl chloride selectivity is 53%.
Example Embodiment
[0013] Embodiment three:
[0014] The preparation process is the same as that of catalyst A, except that the precursor calcination temperature is changed to 400°C, other conditions remain unchanged, and the obtained sample is named C. Catalyst C is used in the reaction of acetylene hydrochlorination to prepare vinyl chloride. The acetylene conversion rate at 150°C is 52%, and the vinyl chloride selectivity is 44%.
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