The Tunable Oxidation Process of 5‑Hydroxymethylfurfural with Co Doping Manganese Oxide Catalyst

The utilization of biomass-derived compounds to produce abundant renewable bio-based chemicals has attract intense interest. The catalyzed oxidation of 5-hydroxymethylfurfural (HMF) is an useful strategy to produce value-added compounds, such as 2, 5-diformylfuran (DFF) and 2,5-furandicarboxylic acid (FDCA). The Co-MnO₂ was developed as an efficient catalyst in HMF conversion under mild conditions. Solvents were investigated and play a vital role on the products distribution. The formation of DFF is facilitated in the organic solvent and 2,5-furandicarboxylic acid (FDCA) is favored to generate in H₂O. As a result, a 87% conversion of HMF with 87% selectivity of DFF was detected in isopropanol, while a 95% FDCA selectivity at 93% HMF conversion was measured in H₂O. Besides, organic solvents were found to affect the HMF selective oxidation reaction and base additives effect on the promotion of C-H and O–H bones activation in HMF molecule was also discussed. This work provide a tunable oxidation process in the transformation of HMF.

The tunable oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran (DFF) and 2,5-furandicarboxylicacid (FDCA) has been successfully performed with Co-MnO₂ catalyst.