分子筛MCM-48负载磷钨酸催化合成环己酮乙二醇缩酮

Catalytic synthesis of cyclohexanone ethylene ketal with H3PW12040 loaded on MCM-48 molecular sieve as catalyst

报道了以分子筛MCM-48负载磷钨酸（H3PW12O40／MCM-48）为催化剂，通过环己酮和乙二醇反虑合成了环己酮乙二醇缩酮，探讨了H3PW12O40／MCM-48封缩酮反应的催化活性，较系统地研究了酮醇物质的量比，催化刻用量，反应时间诸因素对产品收率的影响。实验表明：H3PW12O40／MCM-48是合成环己酮乙二醇缩酮的良好催化剂，在n（环己酮）：n（乙二醇）=1：1．6，催化剂用量为反应物料总质量的0．25％，环己烷为带水剂，反虑时间40min的优化条件下，环己酮乙二醇缩酮的收率可达80．63％。

Cyclohexanone ethylene ketal was synthesized H3PW12O4o/MCM-48. The factors influencing the synthesis quantity of catalyst and the reaction time were discussed and from cyclohexanone and glycol in the presence of of molar ratio of glycol to cyclohexanone, the the best conditions were found out. The optimum conditions are： molar ratio of glycol to cyclohexanone is 1.6：1, the quantity of catalyst is equal to 0.25% of feed stocks, and the reaction time is 40 min. H3PW12O40/MCM-48 is an excellent catalyst for synthesizing cyclohexanone ethylene ketal and its yield can reach over 80.63%.