Method for synthesizing 2,5-furandicarboxylic acid

The invention discloses a method for synthesizing 2,5-furandicarboxylic acid, which comprises the following steps of: mixing furans and alkaline solution in a mass ratio of 1:5-50, adding a noble metal catalyst in an amount of 1 to 5 percent of the molar weight of the furans, continuously introducing oxygen at normal temperature, and reacting for 10 to 30 hours, wherein based on each gram of the furans, the oxygen introducing rate is 5 to 20ml/min; and adjusting the pH of the reaction liquid to less than 3 with concentrated acid, and precipitating the 2,5-furandicarboxylic acid, wherein the noble metal catalyst is Pt/C, Au/C, Pd/C, Pt/C/CuO-Ag2O, Au/C/CuO-Ag2O or Pd/C/CuO-Ag2O, and the concentrated acid is concentrated hydrochloric acid or concentrated sulfuric acid. The process method for synthesizing the 2,5-furandicarboxylic acid has the advantages of simple and direct route, energy conservation, environmental protection, high quality and low cost of the obtained product, and good application prospect.