磷钨酸/硅胶催化剂催化合成丁醛1,2-丙二醇缩醛  

CATALYTIC SYNTHESIS OF BUTYRALDEHYDE 1,2-PROPANEDIOL ACETAL WITH PHOSPHOTUNGSTIC ACID/SILICA

作　　者：杨水金[1] 孔书益[1] 

机构地区：[1]湖北师范学院化学与环境工程学院,湖北黄石435002

出　　处：《井冈山大学学报（自然科学版）》2011年第4期41-43,52,共4页Journal of Jinggangshan University (Natural Science)

基　　金：湖北省自然科学基金项目(2005ABA053)

摘　　要：以溶胶-凝胶法自制的磷钨酸/硅胶为催化剂,通过丁醛和1,2-丙二醇为原料反应合成丁醛1,2-丙二醇缩醛,探讨了磷钨酸/硅胶催化剂对缩醛反应的催化活性,用正交试验法较系统地研究了醛醇量比、催化剂用量、带水剂用量、反应时间诸因素对产品收率的影响。实验表明:磷钨酸/硅胶是合成丁醛1,2-丙二醇缩醛的良好催化剂,在n(丁醛):n(1,2-丙二醇)=1.0:1.6,催化剂用量为反应物料总质量的0.50%,带水剂环己烷为6mL,反应时间60min的优化条件下,丁醛1,2-丙二醇缩醛的收率可达78.5%。Butyraldehyde 1,2-propanediol acetal was synthesized from butyraldehyde and 1,2-propanediol in the presence of phosphotungstic acid/silica prepared by sol-gel method.The effects of operation parameters such as molar ratio of butyraldehyde to 1,2-propanediol,the dosage of catalyst,the volume of cyclohexane as the water-carrying agent and reaction time on the yield were measured and analyzed in order to optimize these operation conditions.Under the experimental conditions of molar ratio of butyraldehyde to 1,2-propanediol is 1：1.6,the mass ratio of the catalyst is 0.50% of all the reactants,volume of cyclohexane is 6ml,and the reaction time is 60min,the yield of butyraldehyde 1,2-propanediol acetal is 78.5%.

关 键 词：丁醛1 2-丙二醇缩醛 磷钨酸/硅胶 催化剂 缩醛反应 

分 类 号：TQ426.91[化学工程] TQ655