SO_4^(2-)/TiO_2-MoO_3-La_2O_3催化合成环己酮1,2-丙二醇缩酮

Catalytic Synthesis of Cyclohexanone 1,2-Propylene Ketal Over SO_4^(2-)/TiO_2-MoO 3-La_2O_3

报道了以固体超强酸SO2 -4/TiO2 -MoO3 -La2 O3 为多相催化剂 ,通过环己酮和 1,2 -丙二醇反应合成了环己酮 1,2 -丙二醇缩酮 ,探讨SO2 -4/TiO2 -MoO3 -La2 O3 对缩酮反应的催化活性 ,较系统地研究了酮醇量比 ,催化剂用量 ,反应时间诸因素对产品收率的影响。实验表明 :SO2 -4/TiO2 -MoO3 -La2 O3 是合成环己酮 1,2 -丙二醇缩酮的良好催化剂 ,在 n(酮 )∶ n(醇 ) =1∶1.5 ,催化剂用量为反应物料总质量的 1.0 % ,环己烷为带水剂 ,反应时间 1.0h的优化条件下 ,环己酮 1,2 -丙二醇缩酮的收率可达84 .2 %。

Cyclohexanone 1,2-propylene ketal was synthesized from cyclohexanone and 1,2-propylene glycol in the presence of SO 2- 4/TiO 2-MoO 3-La 2O 3. The factors influencing the synthesis were discussed and the best conditions were found out. The optimum conditions were: molar ratio of cyclohexanone to 1,2-propylene glycol was 1∶1.5, the quantity of catalyst was equal to 1.0 % of feed stocks, and the reaction time 1.0 h. SO 2- 4/TiO 2-MoO 3-La 2O 3 was an excellent catalyst for synthesizing cyclohexanone 1,2-propylene ketal and its yield can reach over 84.2 %.