Cataly tic Synthesis of Acetals or Ketals With γ-Al2O3 Supported SO2 -4 -TiO2 Solid Superacid Catalyst

Journal of Liaoning Petrochemical University ›› 2006, Vol. 26 ›› Issue (2): 38-41.

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Cataly tic Synthesis of Acetals or Ketals With γ-Al₂O₃ Supported ^{SO2 -}₄ -TiO₂ Solid Superacid Catalyst

School of Petrochemical Technology , Liaoning University of Petroleum & Chemical Technology ,Fushun Liaoning 113001, P .R .China

Received:2005-12-02 Published:2006-02-25 Online:2006-02-25

SO^{2 -}₄ -TiO₂/γ-Al₂O₃ 固体超强酸催化剂上的缩醛(酮)反应

张晓丽, 高文艺, 任立国^＊

辽宁石油化工大学石油化工学院, 辽宁抚顺113001

作者简介:张晓丽(1969 -), 女, 山东聊城市, 实验师, 在读工程硕士。

Abstract

Abstract:

　 SO^{2 -}₄ -TiO₂/γ-Al₂O₃ solid superacid catalysts were prepared by impregnation method.Benzaldehyde ethylene glycol acetal was synthesized from benzaldehyde and ethylene glycol on SO^{2 -}₄ -TiO₂/γ-Al₂O₃ solid superacid catalyst .The effects of calcination temperature of catalyst , mass fraction of TiO2 , molar ratio of benzaldehyde and ethylene glycol, catalyst mass, types and mass of water -carrying reagent , refluxing time and catalyst stability on reaction were investigated.The results show that the calcination temperature is 500 ℃, the mass fraction of TiO₂ is 10%, the mass of catalyst is 1.1 g , the molar ratio of benzaldehyde and ethylene glycol is 1∶1.2, 20mL toluene is water -carrying reagent , 1 .5 h refluxing time .Under the optimum conditions , the yield and purity of a benzaldehyde ethylene glycol acetal were 96.1% and 99.6%, respectively .SO^{2 -}₄ -TiO₂/γ-Al₂O₃ solid superacid catalyst has good catalytic activity in the synthesis of other acetals(or ketals)

Key words: 　Solid superacid , 　Catalyst , 　Acetal

摘要： 通过浸渍法制备了SO^{2 -}₄ -TiO₂/γ-Al₂O₃ 新型固体超强酸催化剂, 以苯甲醛和乙二醇为原料合成了苯甲醛乙二醇缩醛。考察了催化剂的焙烧温度、带水剂的种类和体积、TiO₂ 的质量分数、苯甲醛与乙二醇的摩尔比、催化剂的质量和回流时间对反应的影响以及催化剂稳定性对反应的影响。结果表明, 在焙烧温度为500 ℃, 甲苯为带水剂, 甲苯体积为20 m L, TiO₂的质量分数为10 %, 苯甲醛与乙二醇的摩尔比为1∶1.2, 催化剂的质量为1.1 g , 回流时间为1.5 h 的反应条件下, 苯甲醛乙二醇缩醛的收率可达96 .1%, 产品的纯度为99.6 %。SO2 -4 -TiO2/γ-Al2O3 新型固体超强酸催化剂在其它缩醛(酮)的合成中也具有良好的催化活性。

关键词: 固体超强酸, 　催化剂, 　缩醛

ZHANG Xiao -li,GAO Wen -yi,REN Li -guo. Cataly tic Synthesis of Acetals or Ketals With γ-Al₂O₃ Supported ^{SO2 -}₄ -TiO₂ Solid Superacid Catalyst[J]. Journal of Liaoning Petrochemical University, 2006, 26(2): 38-41.

张晓丽, 高文艺, 任立国. SO^{2 -}₄ -TiO₂/γ-Al₂O₃ 固体超强酸催化剂上的缩醛(酮)反应[J]. 辽宁石油化工大学学报, 2006, 26(2): 38-41.

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Cataly tic Synthesis of Acetals or Ketals With γ-Al₂O₃ Supported ^{SO2 -}₄ -TiO₂ Solid Superacid Catalyst

SO^{2 -}₄ -TiO₂/γ-Al₂O₃ 固体超强酸催化剂上的缩醛(酮)反应

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