Patent ID: 8791277

Claim:
A process for producing a carboxylic acid composition, said process comprising: oxidizing in a primary oxidation zone 5-HMF in the presence of an oxidizing gas comprising oxygen and a solvent stream comprising acetic acid and a catalyst system at a temperature of about 110° C. to shout 160° C. to produce a reaction medium comprising furandicarboxylic acid and then subsequently producing said carboxylic acid composition comprising furandicarboylic acid; wherein said primary oxidation zone comprises at least one oxidation reactor and wherein said catalyst system comprises cobalt in a range from about 500 ppm by weight to about 6000 ppm by weight with respect to the weight of the liquid in the reaction medium, manganese in an amount ranging from about 2 ppm by weight to about 600 ppm by weight with respect to the weight of the liquid in the reaction medium and bromine in an amount ranging from about 300 ppm by weight to about 4500 ppm by weight with respect to the weight of the liquid in the reaction medium; wherein said furandicarboxylic acid is produced at a yield greater than 80% and; wherein said carboxylic acid composition has a b* value less than 15.