Jiajia Xu, Zhiguo Zhu, Ziliang Yuan
Nov 1, 2019
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Influential Citations
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Journal
Journal of the Taiwan Institute of Chemical Engineers
Abstract
Abstract 5-Formyl-2-furancarboxylic acid (FFCA) is an important bio-blocks material, which has promising applications in synthesis, chemical intermediates, drugs, etc. However, the selective oxidation of 5-hydroxymethylfurfural (HMF) into FFCA seems very difficult, which has been rarely studied. In this study, we have developed a new method for the selective oxidation of HMF to FFCA over a Fe-Anderson type catalyst of Na3H6FeMo6O24·5H2O (abbreviated as FeMo6). The FeMo6 catalyst was prepared by the recrystallization method and systematically characterized by XRD, UV–vis, FT-IR, TG, ICP-AES, and XPS technologies. Mo5+ species and a large number of surface oxygen species were found to be close-knit associated with catalytic performances. The experiment found that the maximum FFCA yield can be obtained when n-methyl pyrrolidone (NMP) was used as the reaction solvent and the HMF and K2CO3 molar ratio was 0.5. Under the optimal conditions (HMF/ K2CO3/Catalyst = 1/0.5/0.08, T = 100 °C, 8 h), the oxidation of HMF over the FeMo6 catalyst could produce FFCA with a yield of 75% in the solvent of NMP. Most importantly, this catalyst was employed in this reaction under aerobic environment at atmospheric pressure, demonstrating a high catalytic activity.