Chinese Journal of Catalysis ›› 2011, Vol. 32 ›› Issue (6): 997-1002.DOI: 10.3724/SP.J.1088.2011.01258

• Research papers • Previous Articles     Next Articles

Dehydration of Glucose and Fructose into 5-HMF Catalyzed by Lewis Acid in Ionic Liquids

TIAN Yukui, DENG Jin, PAN Tao, GUO Qingxiang, FU Yao*   

  1. Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei 230026, Anhui, China
  • Received:2010-12-31 Revised:2011-01-27 Online:2011-06-21 Published:2014-10-31

Abstract: A variety of Lewis acids have been examined for the transformation of glucose and fructose into 5-hydroxymethylfurfural (5-HMF) in ionic liquids (ILs). SnCln and CrCln are effective catalysts for the isomerization, and Lewis acids with strong acidity can facilitate the dehydration of fructose. The influence of ILs structure, including the length of alkyl side chain and halide anions, on the conversion was also studied. A distinct odd-even carbon-atom-number effect is observed in the conversion of glucose to 5-HMF and the imidazolium bromides with short alkyl side-chains can provide a higher yield of 5-HMF from fructose. In the presence of 1-ethyl-3-methylimidazolium bromide ([C2MIM]Br) and SnCl2, the yields of 5-HMF are 65% and 73% from glucose and fructose, respectively.

Key words: glucose, fructose, Lewis acid, ionic liquid, 5-hydroxymethylfurfural