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制备了固体超强酸催化剂SO42-/TiO2-Ce(IV),并利用该催化剂催化合成了环己酮乙二醇缩酮,探讨SO42-/TiO2-Ce(IV)对缩酮反应的催化活性,较系统地研究了酮醇物质的量比、催化剂用量、反应时间诸因素对产品收率的影响.实验表明:SO42-/TiO2-Ce(IV)是合成环己酮乙二醇缩酮的良好催化剂,在n(酮)∶n(醇)=1∶1 5,催化剂用量为反应物料总质量的0.5%,环己烷为带水剂,反应时间1.0h的优化条件下,环己酮乙二醇缩酮的收率可达85.7%.
The solid superacid catalyst SO42- / TiO2-Ce (IV) was prepared and the cyclohexanone ethylene ketal was synthesized by this catalyst. The catalytic activity of SO42- / TiO2-Ce (IV) The effects of the molar ratio of ketone to alcohol, the amount of catalyst and the reaction time on the yield of the product were investigated systematically.The experimental results show that SO42- / TiO2-Ce (IV) is a good synthetic cyclohexanone glycol ketal Under the optimized conditions of n (ketone): n (alcohol) = 1: 1 5, the amount of catalyst is 0.5% of the total mass of the reaction mass, cyclohexane is the water-carrying agent and the reaction time is 1.0 h, The yield of ketal can reach 85.7%.