METHOD OF PRODUCING FURAN-2,5-DICARBOXYLIC ACID Russian patent published in 2020 - IPC C07D307/46 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing furan-2,5-dicarboxylic acid, involving the following steps: (a) obtaining or providing a starting mixture containing 5- (hydroxymethyl) furfural (HMF), 5.5'-[oxy-bis(methylene)]bis-2-furfural(di-HMF) and water, where the total amount of water in the starting mixture is at least 50 wt % with respect to the total weight of the starting mixture, and wherein the pH of the initial mixture is in range of 4.0 to 7.0, (b) exposing said feed mixture to oxidative conditions in the presence of an oxygen-containing gas and a catalytically effective amount of a heterogeneous catalyst containing one or more noble metals on the support, such that both HMF and di-HMF react to obtain furan-2,5-dicarboxylic acid in the product mixture, also containing water. Invention also relates to use of a catalyst containing one or more noble metals on a substrate as a heterogeneous catalyst for catalysis in an aqueous initial reaction mixture of both HMF and di-HMF to furan-2,5-dicarboxylic acid.

EFFECT: technical result is a novel method of producing furan-2,5-dicarboxylic acid with high output.

13 cl, 3 tbl