Preparation method of 2,5-furan dicarboxylic acid

The invention belongs to the technical field of five-membered ring compounds, which are not condensed with other rings and contain one oxygen atom taken as the only heterocyclic atom, and specificallyrelates to a preparation method of 2,5-furan dicarboxylic acid. The preparation method comprises following steps: step A, preparing copper oxide loaded by inorganic oxides, and taking the inorganic oxide supported copper oxide as a catalyst to oxidize furfural to obtain furoic acid; and step B, preparing inorganic oxide supported carbonate, and taking the inorganic oxide supported carbonate as acatalyst to oxidize furoic acid to obtain 2,5-furan dicarboxylic acid. The adopted raw materials are abundant and can be obtained massively; the reaction conditions are mild, the yield of 2,5-furan dicarboxylic acid can reach 91-96%; the conversion rate of furfural is 100%; the reaction time is short, the catalyst and the reaction system are easy to separate, the catalyst can be repeatedly used, and the preparation method