Furan-2,5-dicarboxylic acid purge process

A process for producing a carboxylic acid composition, said process comprising:

• (a) oxidizing in a primary oxidation zone at least one oxidizable compound in an oxidizable raw material stream comprising 5-(chloromethyl)furfural (5-CMF), or 2,5-dimethylfuran (2,5-DMF) in the presence of a solvent stream comprising acetic acid, an oxidizing gas comprising oxygen, and a catalyst system at a temperature of about 110° C. to about 220° C. to produce said carboxylic acid composition comprising furandicarboxylic acid at a yield of 80% or more and a mother liquor stream;
• 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 primary oxidation zone, 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 primary oxidation zone 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 primary oxidation zone
• (b) contacting said mother liquor stream in a solvent recovery zone to form an impurity rich waste stream;
• and
• (c) routing a portion of said impurity rich waste stream to a solid-liquid separation zone to form a purge mother liquor stream.