Abstract: A process for producing a carboxylic acid composition including 2,5-furandicarboxylic acid, including the steps: a) oxidizing an oxidizable compound including 5-alkoxymethylfurfural in an oxidation reactor in the presence of a saturated organic acid solvent having from 2 to 6 carbon atoms and a catalyst system comprising cobalt, manganese and bromine using an oxidizing gas at a temperature in the range of 160 to 210° C. to obtain a crude carboxylic acid composition including mono alkyl ester of 2,5-furandicarboxylic acid and solid 2,5-furandicarboxylic acid, b) isolating at least a portion of the solid 2,5-furandicarboxylic acid from the crude carboxylic acid composition in a solid-liquid separation zone to generate a solid cake and a mother liquor, c) determining the amount of manganese and/or cobalt in the cake, and d) increasing the amount of one or more controlling acids in the oxidation reactor.

Abstract: 2,5-Furandicarboxylic acid and methyl acetate are prepared in a continuous process by introducing a 5-methoxymethylfurfural-containing feedstock, an oxygen-containing gas, an oxidation catalyst and an acetic acid-containing solvent into a reactor; allowing 5-methoxymethylfurfural to react with oxygen and acetic acid in the presence of the oxidation catalyst to yield 2,5-furandicarboxylic acid as main product and methyl acetate; withdrawing 2,5-furandicarboxylic acid-containing product from the reactor and recovering 2,5-furandicarboxylic acid product; and withdrawing a vaporous stream containing methyl acetate from the reactor.

Abstract: 2,5-Furandicarboxylic acid and methyl acetate are prepared in a continuous process by introducing a 5-methoxymethylfurfural-containing feedstock, an oxygen-containing gas, an oxidation catalyst and an acetic acid-containing solvent into a reactor; allowing 5-methoxymethylfurfural to react with oxygen and acetic acid in the presence of the oxidation catalyst to yield 2,5-furandicarboxylic acid as main product and methyl acetate; withdrawing 2,5-furandicarboxylic acid-containing product from the reactor and recovering 2,5-furandicarboxylic acid product; and withdrawing a vaporous stream containing methyl acetate from the reactor.

Abstract: A process for separating ethylene glycol from its aqueous mixture with organic acids, salts and unidentified UV light absorbers, the process comprising the steps of a) flashing the aqueous mixture under conditions effective to produce a bottom slurry containing the salts and an overhead aqueous fraction containing the ethylene glycol, the acids and the unidentified UV light absorbers; b) passing the overhead aqueous fraction from step a) through at least one bed of ion exchange resin effective to produce a product stream having a reduced UV light absorbance; and c) drying the product stream of step b) in a dehydrator.

Abstract: A process for separating ethylene glycol from its aqueous mixture with organic acids, salts and unidentified UV light absorbers, the process comprising the steps of