482 / 2018-09-09 10:23:24

One-pot Synthesis of 2,5-Diformylfuran from Fructose by A Polyaniline-supported Heteropolyacid Catalyst

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2,5-Diformylfuran (DFF) is one of the promising biomass-derived platform chemicals. The direct synthesis of DFF from fructose over effective bifunctional catalysts is challenging because of the negative influence of side-products (i.e., water, formic acid (FA), levulinic acid (LA), and humins) on the catalytic activity and recyclability of the catalysts [1-3]. In this work, we report the preparation of polyaniline-supported PMo12 heteropolyacid (HPA) catalyst for the one-pot synthesis of DFF from fructose. We show that the PMo12-40%/PAN catalyst is highly effective for the oxidation of 5-hydroxymethylfurfural (HMF) to DFF (yield = 97%) with good catalyst recyclability, however, less selective for fructose-to-DFF conversion due to the generation of FA (20%), LA (13%), and humins. By modifying the polyaniline support with formaldehyde, the as-synthesized PMo12-40%/F-PAN is more active and selective for fructose-to-DFF conversion with DFF yield of 74%, wherein the generation of side-products has been significantly reduced. This research highlights the designing of novel hybrid catalyst for producing important platform furan chemicals from biomass-derived hexose.