离子液体中树脂催化转化果糖为5-羟甲基糠醛

Catalytic Conversion of Fructose to 5-Hydroxymethylfurfural by Ion-exchange Resin in Ionic Liquid

开发了以离子液体1-丁基-3-甲基咪唑氯盐([BMIM]Cl)为溶剂,固体酸离子交换树脂NKC-9为催化剂转化果糖为5-羟甲基糠醛的绿色工艺.在此催化体系中,100℃下反应10 min时5-HMF的产率达到78.0%,其反应时间远远小于已有文献报道的长达数小时的反应时间.在此催化体系中,果糖起始浓度的增加对5-HMF产率影响不大,因而此工艺同样适用于处理高浓度的果糖溶液.离子液体[BMIM]Cl和树脂组成的催化体系可以循环使用。

An efficient process for the dehydration of fructose to 5-hydroxymethylfurfural（5-HMF） in ionic liquid 1-butyl-3-methyl-imidazolium chloride（[BMIM]Cl） in the presence of ion-exchange resin was deve-loped.A 5-HMF yield of 78.0% was achieved in 10 min at 100 ℃,where the reaction time required was much lower than that reported in previous works for converting fructose to 5-HMF.No remarkably decrease in 5-HMF yield occurred for initial fructose concentrations up to 20%（mass fraction）.The ionic liquid and ion-exchange resin could be recycled and exhibited constant activity for 9 successive trials.