固体超强酸S_2O_8^(2-)/SnO_2-SiO_2催化合成环己酮乙二醇缩酮

The Synthesis of Cyclohexanone Ethylene Ketal Catalyzed by Solid Superacid S_2O_8^(2-)/SnO_2-SiO_2 Catalyst

以固体超强酸S2O82-/SnO2-SiO2为催化剂,通过环己酮和乙二醇反应合成环己酮乙二醇缩酮。较系统的研究了带水剂用量、酮醇摩尔比、催化剂用量、反应时间等因素对产品收率的影响。结果表明在n(酮):n(醇)=1:1.5、环己烷作带水剂(15mL)、催化剂用量为反应物总质量的0.5%、反应时间1.5 h的优化条件下,环己酮乙二醇缩酮的产率为86.9%。

Cyclohexanone ethylene ketal was synthesized from cyclohexanone and ethylene glycol in the presence of solid superacid S2O2-8/SnO2-SiO2.The effect of molar ratio of cyclohexanone to ethylene glycol,catalyst amount,reaction time,and amount of the water-entraining agent on the ketalization reacation were investigated.The optimum conditions were that molar ratio of cyclohexanone to ethylene glycol was 1：1.5,cyclo-hexane as water-entraining agent,the quantity of catalyst was equal to 0.5% of feed stocks,and the reaction time was 1.5 h.S2O2-8/SnO2-SiO2 was a good catalyst for synthesizing cyclohexanone ethylene ketal and its yied can reach 86.9%.