复合固体超强酸SO_4^(2-)/Fe_2O_3/Al_2O_3/ZnO的制备及其催化性能的研究

Preparation of solid superacid SO_4^(2-)/Fe_2O_3/Al_2O_3/ZnO and its catalytic properties

利用共沉淀法由Fe(NO3)3、Al(NO3)3、Zn(Ac)2和H2SO4制备了SO42-/Fe2O3/Al2O3/ZnO催化剂,并用于催化合成苯甲醛丙二醇缩醛,研究了醛醇摩尔比、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(苯甲醛)∶n(丙二醇)=1∶1.2,催化剂用量为反应物总质量的1%,反应时间50 min的最佳条件下,苯甲醛丙二醇缩醛的收率可达97.6%。

The SO4^（2-）/Fe2O3/Al2O3/ZnO solid acid catalyst was prepared from Fe（NO3）3·9H2O and Al（NO3）3·9H2O and Zn（Ac） 2 by a co-precipitation method. And used as catalysts for the synthesis of benzaldehyde 1,2-propanediol acetal. Influence of aldol molar ratio, catalyst amount, reaction time on product yield. The results showed that n（benzaldehyde） ： n（propanediol） is 1： 1.2, the amount of catalyst 1% of the total mass of reactants, under the optimum conditions of the reaction time of 50 min, the yield of benzaldehyde 1,2-propanediol acetal was uo to 97.6%