SO_4^(2-)/TiO_2-MoO_3催化合成丁醛乙二醇缩醛的研究

Synthesis of Butyraldehyde Glycol Acetal by Using SO_4^(2-)/TiO_2-MoO_3 as Catalyst

以固体超强酸SO4 2 - /TiO2 MoO3为催化剂 ,对以丁醛和乙二醇为原料合成丁醛乙二醇缩醛的反应条件进行了研究。实验表明 :SO4 2 - /TiO2 MoO3是合成丁醛乙二醇缩醛的良好催化剂 ,较系统地研究了醛醇摩尔比、催化剂用量、反应时间诸因素对收率的影响。最佳反应条件为 :n(丁醛 )∶n(乙二醇 ) =1∶1.3 ,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 45min。上述条件下 ,丁醛乙二醇缩醛的收率可达 68.1%。

Butyraldehyde glycol acetal was synthesized from butyraldehyde and glycol in the presence of SO 4 2- /TiO 2 MoO 3. The factors influencing the yield of product and the optimum reaction conditions were discussed. The optimum conditions are as follows: molar ratio of butyraldehyde to glycol is 1∶1.3, quantity of catalyst is equal to 0.5% feed stock, and the reaction time is 45 min. SO 4 2- /TiO 2 MoO 3 is an excellent catalyst to synthesize butyraldehyde glycol acetal and the yield can be up to 68.1%.