Patent ID: 8969404
Filing Date: 2015-03-03
Classification: C07D

Abstract:
1. A process for purifying a crude furan 2,5-dicarboxylic acid composition (cFDCA) comprising: a) providing a cFDCA composition comprising furan 2,5-dicarboxylic acid (FDCA) solids, 5-formyl furan-2-carboxylic acid (FFCA), and a oxidation solvent composition; b) combining a hydrogenation solvent composition with said FDCA solids and dissolving at least a portion of the FDCA solids to thereby produce a solvated FDCA (sFDCA) composition comprising dissolved FDCA, the hydrogenation solvent composition, and FFCA; c) in a hydrogenation reaction zone, hydrogenating the sFDCA at a temperature within a range of 130° C. to 225° C. by contacting the sFDCA composition with hydrogen in the presence of a hydrogenation catalyst to thereby hydrogenate FFCA and produce a furan 2,5-dicarboxylic acid composition (hFDCA) comprising a hydrogenated FFCA species, dissolved FDCA, and said hydrogenation solvent; and e) separating at least a portion of the dissolved FDCA from the hFDCA composition to obtain a product FDCA (pFDCA) composition.