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以二氧化硅负载磷钨钼酸(H_3PW_6Mo_6O_(40)/SiO_2)为催化剂,丁酮和乙二醇为原料合成丁酮乙二醇缩酮。探讨了H_3PW_6Mo_6O_(40)/SiO_2对缩酮反应的催化活性,较系统地研究了酮与醇物质的量比、催化剂用量、反应时间等因素对产物收率的影响。实验表明,二氧化硅负载磷钨钼酸催化剂是合成丁酮乙二醇缩酮的良好催化剂,在n(丁酮):n(乙二醇)=1:1.5,催化剂用量占反应物料总质量的0.6%,环己烷10mL作带水剂,反应时间60min的优化条件下,丁酮乙二醇缩酮的平均收率可达86.0%。
Using methyl ethyl ketone and ethylene glycol as raw materials to synthesize butanone ethylene glycol ketal with the catalyst of H 2 P 2 Mo 6 O 40 / SiO 2 supported on silica. The catalytic activity of H_3PW_6Mo_6O_ (40) / SiO_2 on the ketal reaction was discussed. The effects of the ratio of ketone to alcohol, the amount of catalyst and the reaction time on the yield of the product were systematically investigated. The experiments show that the catalyst of phosphorus-tungsten-molybdate supported on silica is a good catalyst for the synthesis of butanone glycol ketal. When n (butanone): n (ethylene glycol) = 1: 1.5, the amount of catalyst accounts for the total mass of the reaction mass Of 0.6%, cyclohexane 10mL for water-carrying agent, the optimal reaction time 60min, butanone ethylene ketal average yield of up to 86.0%.