Heterogeneous catalysts for the selective aerobic oxidation of 5-hydroxymethylfurfural to added value products in water

This review presents the state of the art of the aerobic selective oxidation of 5-hydroxymetylfurfural (5-HMF) with heterogeneous catalysts in water, for the preparation of added value products. Aspects such as kind of metals used for making the catalysts and external additives will be examined. The paper is divided into four main parts each dealing with a specific product obtained from 5-HMF: (a) 2,5-diformylfuran (DFF), (b) 5-hydroxymethyl-2-furancarboxylic acid (HMFCA), (c) 5-formyl-2-furancarboxylic acid (FFCA), (d) 2,5-furandicarboxylic acid (FDCA).