期刊
APPLIED CATALYSIS A-GENERAL
卷 484, 期 -, 页码 74-78出版社
ELSEVIER
DOI: 10.1016/j.apcata.2014.07.014
关键词
Heteropolyacids; Dehydration; Fructose; 5-Hydroxymethylfurfural; Ionic liquid
资金
- National Basic Research Program of China [2014CB932104]
- National Science Foundation of China [21222104]
- Fundamental Research Funds for the Central Universities [RC1302]
- Program for Changjiang Scholars and Innovative Research Team in University
The heteropolyacids (HPAs) of H3PW12O40 (PW12) and H4SiW12O40 (SiW12) have been demonstrated to be effective catalysts for promoting dehydration of the fructose to 5-hydroxymethylfurfural (5-HMF) in the presence of the ionic liquid of 1-butyl-3-methyl imidazolium chloride ([BMIM]Cl) as green solvent. The 5-HMF can be obtained with both the yield and selectivity of 99% at 80 degrees C in only 5 min. The activation energy of 31.88 kJ mol(-1) by applying the [BMIM]Cl/PW12 system for dehydration of the fructose is much lower than those reported in the literature. Moreover, the used ionic liquid of [BMIM]Cl and HPAs could be recycled and reused with only slight decrease of reactivity for at least ten times. Compared with those systems reported so far, the [BMIM]Cl/PW12 and [BMIM]Cl/SiW12 exhibit higher yield, shorter reaction time, lower temperature for catalytic conversion of the fructose to 5-HMF, and they are environmental-friendly green systems. (C) 2014 Elsevier B.V. All rights reserved.
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