A process for purifying a crude furan 2,5-dicarboxylic acid (cFDCA) composition comprising: a) providing in an oxidation zone a cFDCA composition comprising furan 2,5-dicarboxylic acid (FDCA) solids, 5-formyl furan-2-carboxylic acid (FFCA), and a liquid oxidation solvent composition, wherein the oxidation solvent composition is an aliphatic carboxylic acid comprising a C 2 to C 6 monocarboxylic acid; or the oxidation solvent composition is an aqueous acetic acid solution having an acetic acid concentration of 80 to 99 wt.% before adding it to the oxidation zone; or the oxidation solvent composition as added to the oxidation zone comprises a mixture of water and acetic acid which has a water content of 0 % to 15 % by weight; b) separating at least a portion of the oxidation solvent composition from the FDCA solids in the cFDCA composition in a first solid-liquid separation zone to generate a concentrated cFDCA composition comprising FDCA solids and enriched in the concentration of solids relative to the concentration of solids in the cFDCA composition fed to the first solid-liquid separation zone; c) feeding the concentrated cFDCA composition to a dissolution zone in which a hydrogenation solvent composition is combined with the FDCA solids in the concentrated cFDCA composition and dissolving at least a portion of said FDCA solids to thereby produce a solvated FDCA (sFDCA) composition comprising dissolved furan 2,5-dicarboxylic acid (FDCA), the hydrogenation solvent composition, and 5-formyl furan-2-carboxyic acid (FFCA), wherein the hydrogenation solvent composition comprises at least 80 wt.% water; d) subjecting the sFDCA composition to a hydrogenation reaction in a hydrogenation reaction zone under conditions sufficient to cause hydrogenation of at least a portion of the FFCA in the sFDCA composition to generate a hydrogenated FDCA (hFDCA) composition comprising dissolved FDCA and the hydrogenation solvent composition; and e) crystallizing the hFDCA composition in a purified crystallization zone to generate a crystallized hFDCA composition comprising liquid and FDCA solids; and f) separating at least a portion of the liquid from the FDCA solids in the crystallized hFDCA composition in a second solid-liquid separation zone to thereby generate a purified FDCA (pFDCA) composition enriched in the concentration of FDCA solids relative to the concentration of FDCA solids in the crystallized hFDCA composition. a) providing in an oxidation zone a cFDCA composition comprising furan 2,5-dicarboxylic acid (FDCA) solids, 5-formyl furan-2-carboxylic acid (FFCA), and a liquid oxidation solvent composition, wherein the oxidation solvent composition is an aliphatic carboxylic acid comprising a C 2 to C 6 monocarboxylic acid; or the oxidation solvent composition is an aqueous acetic acid solution having an acetic acid concentration of 80 to 99 wt.% before adding it to the oxidation zone; or the oxidation solvent composition as added to the oxidation zone comprises a mixture of water and acetic acid which has a water content of 0 % to 15 % by weight; b) separating at least a portion of the oxidation solvent composition from the FDCA solids in the cFDCA composition in a first solid-liquid separation zone to generate a concentrated cFDCA composition comprising FDCA solids and enriched in the concentration of solids relative to the concentration of solids in the cFDCA composition fed to the first solid-liquid separation zone; c) feeding the concentrated cFDCA composition to a dissolution zone in which a hydrogenation solvent composition is combined with the FDCA solids in the concentrated cFDCA composition and dissolving at least a portion of said FDCA solids to thereby produce a solvated FDCA (sFDCA) composition comprising dissolved furan 2,5-dicarboxylic acid (FDCA), the hydrogenation solvent composition, and 5-formyl furan-2-carboxyic acid (FFCA), wherein the hydrogenation solvent composition comprises at least 80 wt.% water; d) subjecting the sFDCA composition to a hydrogenation reaction in a hydrogenation reaction zone under conditions sufficient to cause hydrogenation of at least a portion of the FFCA in the sFDCA composition to generate a hydrogenated FDCA (hFDCA) composition comprising dissolved FDCA and the hydrogenation solvent composition; and e) crystallizing the hFDCA composition in a purified crystallization zone to generate a crystallized hFDCA composition comprising liquid and FDCA solids; and f) separating at least a portion of the liquid from the FDCA solids in the crystallized hFDCA composition in a second solid-liquid separation zone to thereby generate a purified FDCA (pFDCA) composition enriched in the concentration of FDCA solids relative to the concentration of FDCA solids in the crystallized hFDCA composition.