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Journal of Industrial and Engineering Chemistry, Vol.19, No.3, 1056-1059, May, 2013
Selective oxidation of HMF to DFF using Ru/γ-alumina catalyst in moderate boiling solvents toward industrial production
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Selective oxidation of 5-hydroxymethyl-2-furfural (HMF) to 2,5-diformylfuran (DFF) toward industrial production was studied over Ru supported γ-alumina catalyst using molecular oxygen as an oxidant. From the solvents screening, considering recyclability after reaction, toluene was found to be the best solvent and gave maximum conversion of 99% with 97% DFF selectivity at 130 ℃ and 40 psi O2 pressure. Catalyst was washed with NaOH solution of pH = 12 to remove the adsorbed polymer impurities and then reused up to 5 cycles. The product could be purified by simple evaporation of the solvent, which could add advantage for industrial process.
Keywords:Biomass;Ruthenium;γ-Alumina;Selective oxidation;5-Hydroxymethyl-2-furfural (HMF);2,5-Diformylfuran (DFF)
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