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制备了纳米TiO2固体超强酸催化剂和介孔TiO2固体超强酸催化剂,表征了催化剂的物化性能.研究了浓硫酸和固体超强酸催化剂催化合成环己酮乙二醇缩酮的催化性能,系统考察了酮和醇物质的量的比、催化剂用量、反应时间等因素对产品收率的影响.试验表明,介孔TiO2固体超强酸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1.0 g,环己酮用量20.66 mL,带水剂环己烷用量20 mL,反应时间2 h的优化条件下,环己酮乙二醇缩酮的收率可达82.1%.
Nanometer TiO2 solid superacid catalyst and mesoporous TiO2 solid superacid catalyst were prepared to characterize the physical and chemical properties of the catalyst.The catalytic performance of concentrated sulfuric acid and solid superacid catalyst for the synthesis of cyclohexanone ethylene ketal was studied systematically The ratio of the amount of ketone to alcohol, the amount of catalyst and the reaction time on the yield of the product.The results show that the mesoporous TiO2 solid superacid is a good catalyst for the synthesis of cyclohexanone ethylene ketal, ): N (alcohol) = 1: 1.5, the amount of catalyst 1.0 g, the amount of cyclohexanone 20.66 mL, the amount of cyclohexane solvent 20 mL, the reaction time 2 h under the optimal conditions, cyclohexanone ethylene ketal The yield can reach 82.1%.