Nowadays, the conversion of renewable biomass into useful chemicals has attracted much more attention. 5-hydroxymethylfurfural (HMF), as a key precursor for the synthesis of derivatives has received great attention from the researchers. 2,5-furandicarboxylic acid (FDCA) was identified as one of the twelve pivotal sugar-based building blocks which own the largest potential for the production of bio-based chemicals and materials. Therefore, the oxidation of HMF into FDCA is of great importance and has been extensively studied in recent decades under a variety of reaction conditions and catalysts.<br/>In order to avoid using homogeneous base, the exploitation of stable and efficient heterogeneous catalysts for the aerobic oxidation of HMF to FDCA under base-free conditions still remains challenging. Herein, we designed a novel Pt/C-O-Mg catalyst by coating MgO particles with carbon and then removing free MgO before loading Pt onto carbon surface. The surface of catalyst support is alkaline due to the formation of C-O-Mg bond. Thus prepared Pt/C-O-Mg catalyst exhibits excellent selectivity and stability, the yield of FDCA reached 97% and can be reused for 10 times with less deactivation. Furthermore, when this catalyst was used in larger scale, the isolated yield of FDCA reached 74.9%, retaining its catalytic performance, and crystalline FDCA was obtained with the purity as high as 99.5%.

Base-free aerobic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid over Pt/C-O-Mg catalyst

251st National Meeting (2016)

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