Preparation and application of synthesizing chloroethylene mercury free catalyst through acetylene method
A non-mercury catalyst and vinyl chloride technology, applied in the field of catalysis, can solve the problems of uneven distribution of components, short life, low catalytic activity, etc., and achieve the effects of simple preparation method, prolonged service life and improved reaction activity
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Embodiment 1
[0030] Stir 10 g of activated carbon with 2 mol / L hydrochloric acid in a 70°C water bath for 4 hours, filter, wash with deionized water several times until the filtrate is neutral, and dry at 120°C for 12 hours. Dissolve 0.2654g of chloroplatinic acid and 0.5212g of lanthanum chloride in 15ml of 2mol / L hydrochloric acid, add dropwise into the pretreated activated carbon after clarification, and impregnate at room temperature for 4h; Microwave treatment at 1000W and 2450MHz for 5min under protection to obtain a catalyst with a Pt content of 1% and a La content of 2%.
[0031] Use this catalyst for evaluation: put the catalyst in a stainless steel fixed-bed reactor with an inner diameter of 10mm and a length of 40cm, heat and control the temperature by electric heating, raise the temperature to 180°C, pass in hydrogen chloride for activation for 1 hour, and then pass in acetylene, the ratio of raw gas is V (HCl):V(C 2 h 2 )=1.15, acetylene space velocity 100h -1 , The reactio...
Embodiment 2
[0033] Stir 10 g of activated carbon with 5 mol / L hydrochloric acid in a 70°C water bath for 4 hours, filter, wash with deionized water several times until the filtrate is neutral, and dry at 120°C for 12 hours. Dissolve 0.2091g of chloroauric acid, 0.0265g of chloroplatinic acid, and 0.4050g of nickel chloride in 15ml of aqua regia, add dropwise to the pretreated activated carbon after clarification, impregnate for 4 hours at room temperature, and then place the impregnated catalyst in a microwave reactor , and microwaved at 500W and 2450MHz for 15min under the protection of nitrogen to obtain a catalyst with 1% Au content, 0.1% Pt content and 1% Ni content.
[0034] Evaluate the reaction performance of its acetylene synthesis vinyl chloride by the method of embodiment 1, wherein change reaction temperature control is 160 ℃, raw gas ratio is V (HCl): V (C 2 h 2 ) = 1.2, acetylene space velocity 40h-1 . The results are shown in Table 1.
Embodiment 3
[0036] Stir 10 g of activated carbon with 1 mol / L hydrochloric acid in a 70°C water bath for 4 hours, filter, wash with deionized water several times until the filtrate is neutral, and dry at 120°C for 12 hours. Dissolve 0.1666g of palladium chloride, 0.5369g of copper chloride, and 0.1653g of potassium chloride in 15ml of 1mol / L hydrochloric acid, add dropwise to the pretreated activated carbon after clarification, impregnate at room temperature for 4h, and then place the impregnated catalyst in microwave In the reactor, microwave treatment at 700W and 2450MHz for 10min under the protection of nitrogen to obtain a catalyst with a Pd content of 1%, a Cu content of 2%, and a K content of 1%.
[0037] Evaluate the reaction performance of its acetylene synthesis vinyl chloride by the method of embodiment 1, wherein change reaction temperature control is 170 ℃, raw gas ratio is V (HCl): V (C 2 h 2 ) = 1.2, acetylene space velocity 30h -1 . The results are shown in Table 1.
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