Oxidation of furan derivative

Abstract

Process for producing 2,5-furandicarboxylic acid includes (i) contacting in an oxidation unit a furan derivative with oxidant and solvent in the presence of a catalyst system to obtain intermediate product including 2,5-furandicarboxylic acid, (ii) contacting in a post-oxidation unit the intermediate product with oxidant to which post-oxidation unit oxidizable compound is added thereby obtaining crude product, and (iii) separating the crude product into 2,5-furandicarboxylic acid and mother liquor containing solvent where the oxidizable compound is selected from tetrahydrofuran containing compounds having from 4 to 10 carbon atoms and alcohols having from 2 to 8 carbon atoms and mixtures thereof.

Dependencies are inferred from the claim text.