Preparation of SO(2-)4/TiO2-WO3 solid superacid and its catalytic activity in acetalation and ketalation

作者：Yang SJ^*; Yu XQ; Bai AM; Sun JT

来源：Rare Metals, 2005, 24(1): 22-27.

• solid superacid
• preparation
• catalytic activity
• acetalation
• katalation

SO42-/TiO2-WO3 was prepared and its catalytic activity under different synthetic conditions was discussed with 4 esterification of n-butanoic acid and n-butyl alcohol as probing reaction. The optimum conditions are found that the mass fraction of H2WO4 used in the compound is 12.5%, the calcination temperature is 580 degrees C, the calcination time is 3 h, and the soaked consistency of H2SO4 is 1.0 mol(.)L(-1). Then SO42-/TiO2-WO3 was applied as the catalyst in the catalytic synthesis of eight similar important ketals and acetals under the optimum conditions and revealed high catalytic activity. On condition that the molar ratio of aldehyde/ketone to glycol is 1: 1.5, the mass fraction of the catalyst used in the reactants is 0.5%, and the reaction time is 1.0 h, the yields of ketals and acetals can reach 64.2%-95.1%. Moreover, it can be easily recovered and reused.

• 出版日期2005-3
• 单位湖北师范大学