METHODS FOR PRODUCING 2,5-FURANDICARBOXYLIC ACID, AND ITS INTERMEDIATE COMPOUNDS, AND DERIVATIVES Russian patent published in 2021 - IPC C07D307/68 B01J8/02 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for producing 2-5-furandicarboxylic acid (hereinafter – FDCA) and its intermediate compounds by chemo-catalytic conversion of a furan oxidized substrate. The method involves (a) bringing the first oxidized feedstock containing the first furan oxidized substrate and the first oxidizing solvent into contact with oxygen in the presence of the first heterogeneous oxidation catalyst to form a reaction mixture for the oxidation of the first furan oxidized substrate to the first product of the FDCA reaction pathway to obtain the specified first product of the FDCA reaction pathway. The first oxidizing solvent is a multicomponent solvent containing water and an aprotic organic solvent mixed with water. No base is added to the reaction mixture during the (first) stage (a) of bringing into contact. The first heterogeneous oxidation catalyst contains the first solid carrier and the first noble metal. The specified first solid carrier is selected from a group consisting of metal oxide, carbon-containing material, polymer, metal silicate, metal carbide and their combinations. The specified first noble metal is selected from a group consisting of platinum, gold and their combinations. The specified first furan oxidized substrate is 5-hydroxymethylfurfural (HMF), the intermediate compound of the FDCA reaction pathway or a mixture of any two of them. The intermediate compound of the FDCA reaction pathway is diformylfuran (DFF), hydroxymethylfurancarboxylic acid (HMFCA), formylfurancarboxylic acid (FFCA) or a mixture of any two or more of them. The first product of the FDCA reaction pathway is FDCA or FDCA and the intermediate compound of the FDCA reaction pathway. In the case where the first furan oxidized substrate contains an intermediate compound of the FDCA reaction pathway, the first product of the FDCA reaction pathway contains FDCA, and the specified first solid carrier has a specific surface area of 20 to 500 m²/g.

EFFECT: technical result is developing a highly selective method for chemo-catalytic conversion of furan oxidized substrate.

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