TiSiW_(12)O_(40)/TiO_2催化合成肉桂酸正丙酯

Catalytic Synthesis of n-Propyl Cinnamate Using Environmentally Friendly Catalyst

报道了以固载杂多酸盐TiSiW1 2 O4 0 TiO2 为多相催化剂 ,通过肉桂酸和正丙醇反应合成了肉桂酸正丙酯 ,探讨TiSiW1 2 O4 0 TiO2 对酯化反应的催化活性 ,较系统地研究了醇酸物质的量比 ,催化剂用量 ,反应时间诸因素对产率的影响。实验表明 :TiSiW1 2 O4 0 TiO2 是合成肉桂酸正丙酯的良好催化剂 ,在n(醇 ) :n(酸 ) =2∶1,催化剂用量为反应物料总质量的 4.0 % ,反应时间 6.0h ,反应温度 86～ 94℃的最佳条件下 ,肉桂酸正丙酯的收率可达 73 .6%。

n Propyl cinnamate was synthesized by the esterification of propanol with cinnamic acid in the presence of a new environmentally friendly catalyst, TiSiW 12 O 40 /TiO 2. The factors influencing the synthesis were discussed and the best conditions were found out. The optimum conditions are: molar ratio of alcohol to cinnamic acid is 2∶1 and the quantity of catalyst is equal to 4.0% feed stock. The reaction temperature is 86～94 ℃, and the reaction time is 6 0 h. TiSiW 12 O 40 /TiO 2 is an excellent catalyst for synthesizing n propyl cinnamate and its yield can reach over 73.6%.