纳米稀土复合超强酸催化合成菠萝醛

Catalytic synthesis of allyl caproate by nanometer rare earth complex superacid

以纳米稀土复合超强酸La3+/SO24-/TiO2为催化剂,通过己酸和丙烯醇反应合成菠萝醛,考察各种因素对酯化率的影响。实验结果表明,纳米稀土复合超强酸La3+/SO24-/TiO2是合成菠萝醛的绿色催化剂,最佳反应条件如下:酸醇物质的量比为1∶1.6,催化剂用量为1.5g,带水剂15mL,反应时间2.5h,此时酯化率可达91.3%,并且催化剂可以多次重复使用。

Allyl caproate was synthesized from caproic.acid and propenol using nanometer rare earth complex superacid La^3＋SO4^2-TiO2 as catalyst. The influencing factors of the reaction were investigated. The results showed that the nano-La^3＋SO4^2-TiO2 is a green catalyst for synthesizing allyl caproate. The oplimal conditions were found as follows： molar ratio of acid to alcohol was 1：1.6, the amount of catalyst was 1.5 g, the taking water reagent was 15 mL, reaction time was 2.5 h and yield of allyl caproate could reach 91.3%, and the catalyst can be reused for many times.