制备了Ni-Cu/MO2(M=Si,Ti,Zr)催化剂,并在离子液体和有机溶剂介质中研究了其对柠檬醛(1)催化加氢合成薄荷醇(4)的反应。结果表明:相比于有机溶剂,在离子液体中催化剂对1分子中的2位C=C双键加氢更容易,提高了选择性;特别是可调节酸度的离子液体[bmim][AlmCln],在竞争性加氢中促进了1向生成4的方向转化;在2 MPa,80℃的反应条件下,1的转化率为100%,对4的选择性为88.6%。
The catalysts, Ni-Cu/MO2 (M = Si, Ti, Zr), were prepared and were used for selective hydrogenation of citral(1) to menthacamphor(4) in room temperature ionic liquids or organic sol- vents. The results showed that the conversion of I was 100% and the selectivity of 4 was 88.6% in Lewis acidic ionic liquids at 80 ℃ under 2 MPa.