H_4SiW_(12)O_(40)/TiO_2-SiO_2催化合成丁醛乙二醇缩醛  

Catalytic synthesis of butyraldehyde glycol acetal with H_4SiW_(12)O_(40)/ TiO_2-SiO_2

作　　者：王巍焜 张唯[1] 彭放[1] 杨水金[1] 

机构地区：[1]湖北师范学院化学化工学院,湖北黄石435002

出　　处：《能源化工》2015年第2期67-70,共4页Energy Chemical Industry

摘　　要：以H4Si W12O40/Ti O2-Si O2为催化剂、丁醛和乙二醇为原料合成了丁醛乙二醇缩醛。探讨了H4Si W12O40/Ti O2-Si O2对缩醛反应的催化活性,考察了醛醇摩尔比、催化剂用量、带水剂用量、反应时间等因素对产物收率的影响。试验表明:H4Si W12O40/Ti O2-Si O2是合成丁醛乙二醇缩醛的优良催化剂;在固定丁醛0.2 mol、n(丁醛)∶n(乙二醇)=1.0∶1.6、催化剂用量占反应物总质量的0.6%、带水剂环己烷8 m L、反应时间45 min的最佳条件下,丁醛乙二醇缩醛的收率可达84.9%。Butyraldehyde glycol acetal is synthesized from butyraldehyde and glycol in the presence of H4 SiW12 Q0/TiO2-SiO2 ascatalyst. The catalytic activity of H4SiW12Ogo/Ti02-SiO2 in acetalation reaction is discussed. The effects of the mole ratio of butyralde-hyde to glycol, the dosage of catalyst, the dosage of water-carrying agent and the reaction time are investigated. The results show thatH4SiW1204o/TiO2-SiO2is a good catalyst to synthesize butyraldehyde glycol acetal. Under the optimal reaction conditions that benzalde-hyde is 0. 2 mol, molar ratio of butyraldehyde to ethylene glycol is 1.0 ： 1.6, mass fraction of catalyst is 0. 6%, volume of cyclohexaneas the water-carrying agent is 8 mL and reaction time is 45 min, the yield of butyraldehyde glycol acetal can reach 84. 9%.

关 键 词：丁醛乙二醇缩醛 硅钨杂多酸 催化 缩醛反应 

分 类 号：O623.5[理学—有机化学]