Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials and Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, PR China.
ChemSusChem. 2013 Jun;6(6):1063-9. doi: 10.1002/cssc.201200967. Epub 2013 May 13.
Catalytic dehydration of D-fructose to 5-hydroxymethylfurfural (HMF) was investigated over a series of Nafion-modified mesocellular silica foam (MCF) materials. By using an impregnation method, Nafion resin was highly dispersed in the ultra-large pores of the MCFs. Highly efficient and selective dehydration of D-fructose to HMF was achieved in dimethyl sulfoxide solvent; an 89.3% HMF yield with 95.0% selectivity was obtained in the presence of the Nafion(15)/MCF catalyst. The effects of reaction temperature, reaction time, and solvent on the dehydration of D-fructose were systematically investigated. The catalyst could be regenerated through an ion-exchange method and a high yield was retained after being used five times. As a heterogeneous catalytic process, a possible reaction mechanism for the dehydration of D-fructose over Nafion-modified MCF catalysts was proposed.
介孔硅泡沫（MCF）负载全氟磺酸（Nafion）催化剂的制备及其用于果糖脱水制备 5-羟甲基糠醛
采用浸渍法将全氟磺酸树脂高度分散在 MCF 的超大孔中，制备了一系列 Nafion 改性介孔硅泡沫（MCF）材料。在二甲基亚砜溶剂中，D-果糖高效、高选择性地脱水生成 5-羟甲基糠醛，Nafion（15）/MCF 催化剂可获得 89.3%的 HMF 收率和 95.0%的选择性。系统考察了反应温度、反应时间和溶剂对 D-果糖脱水的影响。通过离子交换法可以再生催化剂，重复使用 5 次后仍保持较高的收率。作为多相催化过程，提出了 Nafion 改性 MCF 催化剂上 D-果糖脱水的可能反应机理。
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