Dehydration of Carbohydrates to 5-Hydroxymethylfurfural in Ionic Liquids Catalyzed by Hexachlorotriphosphazene  

作　　者：宋金良 张斌斌 史敬华 马珺 杨冠英 韩布兴 

机构地区：[1]Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China

出　　处：《Chinese Journal of Chemistry》2012年第9期2079-2084,共6页中国化学（英文版）

摘　　要：Development of efficient catalysts for the dehydration of carbohydrates to produce 5-hydroxymethylfurfural （HMF） is a very attractive topic. In this work, dehydration of fructose catalyzed by three organic molecules, includ- ing hexachlorotriphosphazene （N3P3CI6）, trichloromelamine （C3N6H3CI3） and N-bromosuccinimide （NBS）, was studied in ionic liquids. It was discovered that the three organic molecules had high activity in accelerating the de- hydration of fructose and N3P3C16 was the most efficient catalyst among them. The effects of amount of catalysts, temperature, solvents, reaction time, and substrate/solvent weight ratio on the reaction were investigated using N3P3C16 as the catalyst and 1-butyl-3-methylimidazolium chloride （[Bmim]C1） as the solvent. It was demonstrated that the N3P3C16/[Bmim]CI catalytic system was very effective for catalyzing the reaction. The yield of HMF could reach 92.8% in 20 rain at the optimized conditions and the N3P3C16/[Bmim]C1 system could be reused. Further study indicated that the N3P3C16/[Bmim]CI system was also effective for the dehydration of sucrose and inulin and satisfactory yield could be obtained at suitable conditions.Development of efficient catalysts for the dehydration of carbohydrates to produce 5-hydroxymethylfurfural （HMF） is a very attractive topic. In this work, dehydration of fructose catalyzed by three organic molecules, includ- ing hexachlorotriphosphazene （N3P3CI6）, trichloromelamine （C3N6H3CI3） and N-bromosuccinimide （NBS）, was studied in ionic liquids. It was discovered that the three organic molecules had high activity in accelerating the de- hydration of fructose and N3P3C16 was the most efficient catalyst among them. The effects of amount of catalysts, temperature, solvents, reaction time, and substrate/solvent weight ratio on the reaction were investigated using N3P3C16 as the catalyst and 1-butyl-3-methylimidazolium chloride （[Bmim]C1） as the solvent. It was demonstrated that the N3P3C16/[Bmim]CI catalytic system was very effective for catalyzing the reaction. The yield of HMF could reach 92.8% in 20 rain at the optimized conditions and the N3P3C16/[Bmim]C1 system could be reused. Further study indicated that the N3P3C16/[Bmim]CI system was also effective for the dehydration of sucrose and inulin and satisfactory yield could be obtained at suitable conditions.

关 键 词：carbohydrates 5-HYDROXYMETHYLFURFURAL DEHYDRATION hexachlorotriphosphazene ionic liquids 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] O629.1[理学—有机化学]