Method for manufacturing furan-2,5-dicarboxylic acid (FDCA) from a salt solution

• Main Authors: Van Krieken, Jan, De Haan, Andre Banier
• Format: Patent
• Language: English
• Published: 28.09.2017
• Subjects: CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY

The invention pertains to a method for manufacturing furan-2,5-dicarboxylic acid (FDCA) by converting a furan-2,5-dicarboxylate salt (MFDC) into furan-2,5-dicarboxylic acid (FDCA), comprising the steps of combining an aqueous solution of MFDC with a concentration of at least 5 wt.% with an inorganic acid (HY), to form a reaction mixture comprising solid FDCA in a concentration of 1-15 wt.% in a solution of a salt resulting from the cation of the furan-2,5-dicarboxylate salt and the anion of the inorganic acid (MY solution), removing solid FDCA from the reaction mixture in a solid/liquid separation step, and providing part of the MY solution resulting from the solid/liquid separation step to the step of combining MFDC with HY. The step of providing part of the MY salt solution resulting from the solid/liquid separation step to the step of combining MFDC with HY makes it possible to obtain a stable and economic process which results in an FDCA product with good quality, and obtained in high yield.