Macroporous adsorption resin-supported ruthenium catalysts for the efficient selective oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid

Biomass derivative 5-Hydroxymethylfurfural (HMF) can be selectively oxidized to generate 2,5-furandicarboxylic acid (FDCA), which is one of the important reaction pathways for the high-value utilization of biomass. However, the industrialization of the FDCA production via HMF oxidation still faces many challenges. This study found that the ruthenium(Ru) catalysts loaded on the macroporous adsorption resin (Ru/ST-DVB-560) exhibited excellent catalytic activity for the catalytic oxidation of HMF. After reacting in a weak base system for 10 h, HMF was completely converted with 96.60 % FDCA yield. The Ru/ST-DVB-560 catalysts maintained high catalytic activity after being cycled 5 times, and the FDCA yield decreased by only 3.9 %. Furthermore, the reaction products can be easily separated from the Ru/ST-DVB-560 catalysts, and the catalysts can be easily recycled and regenerated. Therefore, this study provides a stable and recyclable high-efficiency Ru/ST-DVB-560 catalyst, which is of great significance for the industrialization of the HMF oxidation to FDCA.