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Fast Transformation of Glucose and Di-/Polysaccharides into 5-Hydroxymethylfurfural by Microwave Heating in an Ionic Liquid/Catalyst System

Authors

  • Dr. Xinhua Qi,

    1. Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300071 (PR China)
    2. Research Center of Supercritical Fluid Technology, Tohoku University, 6-6-11 Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan), Fax: (+81) 022-795-5864
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  • Dr. Masaru Watanabe,

    1. Research Center of Supercritical Fluid Technology, Tohoku University, 6-6-11 Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan), Fax: (+81) 022-795-5864
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  • Dr. Taku M. Aida,

    1. Research Center of Supercritical Fluid Technology, Tohoku University, 6-6-11 Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan), Fax: (+81) 022-795-5864
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  • Prof. Richard L. Smith Jr

    1. Research Center of Supercritical Fluid Technology, Tohoku University, 6-6-11 Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan), Fax: (+81) 022-795-5864
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Abstract

An efficient method for converting glucose into 5-hydroxymethylfurfural (5-HMF), in the presence of CrCl3 catalyst, is developed by using the ionic liquid 1-butyl-3-methyl imidazolium chloride as solvent. A 5-HMF yield of 71 % is achieved in 30 s for 96 % glucose conversion with microwave heating at 140 °C. The activation energy of glucose conversion is determined to be 114.6 kJ mol−1, with a pre-exponential factor of 3.5×1014 min−1. Fructose, sucrose, cellobiose, and cellulose are studied and 5-HMF yields of 54 % are obtained for cellulose conversion at 150 °C during 10 min of reaction time. Recycling of the ionic liquid and CrCl3 is demonstrated with six cycles of use.

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