二氧化硅负载磷钨酸催化合成丁醛乙二醇缩醛  

Synthesis of Butyraldehyde Glycol Acetal using H_3PW_(12)O_(40)/SiO_2 as Catalyst

作　　者：白爱民[1] 石艳花 张玉兰[1] 杨水金[1] 

机构地区：[1]湖北师范学院化学化工学院,黄石435002

出　　处：《化工中间体》2013年第9期34-37,共4页

摘　　要：本文以二氧化硅负载磷钨酸(H_3PW_(12)O_(40)/SiO_2)为催化剂,丁醛和乙二醇为原料合成丁醛乙二醇缩醛,探讨了H_3PW_(12)O_(40)/SiO_2/SiO_2对缩醛反应的催化活性,研究了醛醇物质的量比、催化剂用量、反应时间等因素对产物收率的影响。实验结果表明:H_3PW_(12)O_(40)/SiO_2/SiO_2是合成丁醛乙二醇缩醛的良好催化剂。在固定丁醛用量为0.2mol的情况下,n(丁醛):n(乙二醇)=1:1.4,催化剂的用量占反应物料总质量的1%,环已烷用量为4mL,反应时间为45min的条件下,产品收率可达77.6%。A novel catalyst,H,PW_(12)O_(40)/SiO_2 was synthesized by a sol-gel technique,and characterized by FT-IR and XRD.Butyraldehyde glycol acetal was synthesized from butyraldehyde and glycol in the presence of H_3PW_(12)O_(40)/SiO_2as catalyst.The factors influencing the synthesis were discussed and the best reaction conditions were found out.Experimental results showed that H_3PW_(12)O_(40)/SiO_2 is an excellent catalyst.Under the experimental conditions of molar ratio of butyraldehyde to glycol is 1:1.4,the mass ratio of the catalyst is 1.0%of all the reactants,volume of cyclohexane is 4mL,and the reaction time is45 min,the yield of butyraldehyde glycol acetal can reach 77.6%.

关 键 词：丁醛乙二醇缩醛 H₃PW₁₂O₄₀/SiO₂/SiO₂ 催化 

分 类 号：TQ224.6[化学工程—有机化工]