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Huang P.,Soochow University of China | Huang P.,Suzhou Xingye Material Technology Co. | Gu A.,Soochow University of China | Wang J.,Suzhou Xingye Material Technology Co.
Research on Chemical Intermediates | Year: 2015

Efficient production of 5-hydroxymethylfurfural (HMF) through the dehydration of sugars was achieved by developing a new catalyst caprolactam hydrogen sulfate ([CPL]HSO4) ionic liquid or using metal halide as the co-catalyst in a new water/proprylene glycol monomethyl ether solvent system. With an optimum synthesis condition, the yield of HMF derived from fructose dehydration at 105°C for 90 min is as high as 80.5 % in the presence of [CPL]HSO4. The nature behind the attractive results was revealed by proposing the catalysis mechanism of the fructose dehydration. The yield of HMF is about 70 % using [CPL]HSO4 as the catalyst for fructose dehydration after being reused five times. The catalyst system [CPL]HSO4/metal halide was used for the dehydration of sucrose, and the optimum yield is as high as 64-68 %. © Springer Science+Business Media Dordrecht 2014.


Huang P.,Soochow University of China | Huang P.,Suzhou Xingye Material Technology Co. | Gu A.,Soochow University of China | Wang J.,Suzhou Xingye Material Technology Co.
Chemistry Bulletin / Huaxue Tongbao | Year: 2014

5-Hydroxymethylfurfural (HMF) is an important raw material and intermediate with great potential for applications. HMF derived from the dehydration of fructose is greatly significant to achieve the conversion of biomass utilization. Direct preparation of HMF through the catalytic dehydration of fructose is one of the hottest issues. Catalytic and solvent systems are two key factors for the process of the dehydration of fructose. In this paper, their progress since 2010 was summarized, especially, the catalysts of solid acid (especially heteropoly acid and its salt), ionic liquids with or without halide and the solvent systems including two-phase and single-phase system, which are the hottest issues in this field, were analyzed. It was found that solid acid can be used repeatedly and separated easily in the fructose conversion, while ionic liquid can reduce the fructose degradation and side reaction. Similarly, each solvent system also has advantages and disadvantages. At last, the problems and the prospects for synthesizing HMF from the dehydration of fructose were also discussed.

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