Patent ID: 9284290
Filing Date: 2016-03-15
CPC Classification: C07D,C08G

Claim Text:
1. A process for producing a mixture of 2,4-FDCA and 2,5-FDCA by a disproportionation route comprising the following steps: a) oxidizing furfural compounds in the presence of catalysts and alkaline solution in order to obtain biobased furoic acid salts, wherein the catalysts are selected from the group consisting of Au/TiO b) heating the furoic acid salts under stirring in the presence of a metal based catalyst to prepare a reaction mixture and cooling the reaction mixture until room temperature; c) collecting furan from the reaction mixture obtained in item (b) in order to obtain the mixture of 2,4-FDCA and 2,5-FDCA; d) optionally, filtering off black insoluble material of the reaction mixture obtained in item (c) and acidifying the reaction mixture in order to collect 2,5-FDCA; and e) optionally, subjecting the mixture obtained in item 1 (c), to an extraction or other separation method in order to purify 2,4-FDCA.