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以MCM-48分子筛负载磷钨钼杂多酸为多相催化剂,通过丁酮和1,2-丙二醇反应合成丁酮1,2-丙二醇缩酮.采用正交试验法探讨了MCM-48分子筛负载磷钨钼杂多酸对缩酮反应的催化活性,较系统地研究了原料用量、催化剂用量、带水剂用量、反应时间等因素对收率的影响.结果表明:MCM-48分子筛负载磷钨钼杂多酸是合成丁酮1,2-丙二醇缩酮的良好催化剂,在n(丁酮)∶n(1,2-丙二醇)=1∶1.4,催化剂用量为反应物料总质量的0.2%,环己烷为带水剂,反应时间1.0h的条件下,丁酮1,2-丙二醇缩酮的收率可达81.0%.
The MCM-48 molecular sieve supported heteropolyphosphato-tungstophosphoric acid was used as a heterogeneous catalyst to synthesize butanone 1,2-propanediol ketal by the reaction of butanone with 1,2-propanediol. The effects of MCM-48 molecular sieve loading The catalytic activity of heteropolyphosphoric-tungstophosphoric acid on the ketal reaction was studied systematically. The influences of the amount of raw materials, the amount of catalyst, the amount of water-carrying agent and the reaction time on the yield were studied systematically. The results show that the molecular weight of MCM- Molybdenum heteropolyacid is a good catalyst for the synthesis of butanone 1,2-propanediol ketal. The amount of catalyst is 0.2% of the total mass of the reaction mass at n (butanone): n (1,2-propanediol) = 1: 1.4. Cyclohexane as water-bearing agent, the reaction time of 1.0h, butanone 1,2-propanediol ketal yield of up to 81.0%.