复合固体超强酸催化合成苯甲醛乙二醇缩醛  

Synthesis of benzaldehyde glycol acetal by the composite solid superacid catalyst S_2O_8^(2-)/SnO_2

作　　者：张应军[1] 申红雪[2] 程海军[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450002 [2]郑州轻工业学院计算机与通信工程学院,河南郑州450002

出　　处：《郑州轻工业学院学报（自然科学版）》2008年第2期11-13,共3页Journal of Zhengzhou University of Light Industry:Natural Science

摘　　要：以四氯化锡和过硫酸铵为主要原料,采用沉淀-浸渍法制备新型固体超强酸催化剂S2O82-/SnO2,并用于苯甲醛乙二醇缩醛的合成反应.该催化剂制备的最优条件为:焙烧温度为500℃,(NH4)2S2O8浸渍浓度1.0 mol/L,焙烧时间2.5 h.采用该催化剂合成苯甲醛乙二醇缩醛的最佳条件为:n(乙二醇)∶n(苯甲醛)=1.7∶1,反应时间1.5 h,V(环己烷)=8 mL,m(S2O82-/SnO2)=0.6 g.此时苯甲醛乙二醇缩醛收率可达89.29%.该实验催化剂可重复使用,产品纯度≥98.0%.The novel composite solid superacid catalyst S2O8^2-/SnO2 was prepared by SnCl4 · 5H2O and （NH4 ）2S208 as the raw material with coprecipitation-impregnation method, and it was used in the synthesis of benzaldehyde glycol acetal. The optimum conditions of catalyst preparation were ： calcination temperature 500℃, impregnation concentration of ammonium peroxodisulfate 1.0 mol/L, calcination time 2.5 h. The optimum synthetic conditions of benzaldehyde glycol acetal were resulted as follows：the molar ratio of glycol to benzaldehyde was 1.7： 1, the reaction time was 1.5 h,the volume of cyclohexane was 8 mL, mass of the catalyst was 0.6 g. The yield was more than 89.29%. The catalyst can be used many times. The purity of products was greater than 98.0%.

关 键 词：固体超强酸催化剂 苯甲醛乙二醇缩醛 合成 

分 类 号：TQ655[化学工程—精细化工]