关键词: 溶胶-胶凝,  , 硫酸铁 ,  , 固体酸 , 缩酮化反应 , 环己酮1, 2-丙二醇缩酮

Abstract: Cyclohexanone 1,2-propanediol ketal was synthesized by using cyclohexanone 1,2-propylene glycol as starting materials and silica-supported ferric sulfate \[Fe₂(SO₄)₃/SiO₂\] solid acid as a catalyst under solvent-less conditions. The catalyst was prepared by sol-gel and impregnation methods. Efects of factors on yield of product，such as calcination temperature of Fe₂(SO₄)₃/SiO₂ solid acid catalyst, the mass fration of Fe₂(SO₄)₃, molar ratio of the reactant，reaction time，mass fraction of catalyst and its stability，were investigated in detail. The results show that the Fe₂(SO₄)₃/SiO₂ has high catalytic activities. The optimal reaction conditions are: calcination temperatures of Fe₂₍SO₄)₃/SiO₂ solid acid catalyst 300 ℃, the mass fration of Fe₂(SO₄)₃ in SiO₂ 20%, molar ratio of cyclohexanone to 1,2-propanediol 1∶1, the mass fraction of catalyst 5% and the reaction time 70 min. Under the above conditions the yield of cyclohexanone 1,2-propanediol ketal is 98.21%. Fe₂(SO₄)₃/SiO₂ catalyst is excellent in stability and reusability，and yield of cyclohexanone 1,2-propanediol ketal keeps at 88.90% after being used for 5 times

Key words: Sol-gel ,  , Ferric sulfate ,  Solid acid ,   Ketalization ,  Cyclohexanone 1,2-propanediol ketal