Patent ID: 7494641
Filing Date: 2009-02-24
Classification: C07C

Abstract:
1. A process to produce a high boiling point organic impurities stream from an aqueous mixture said process comprising: (a) adding an extraction solvent to said aqueous mixture in an extraction zone to form an extract stream and a raffinate stream; wherein said extraction zone comprises at least one extractor; and (b) separating said extract stream and a solvent-rich stream in a separation zone to form said high boiling point organic impurities stream; wherein said solvent rich stream is produced by evaporating a mother liquor; wherein said mother liquor is withdrawn from a carboxylic acid synthesis process and wherein said mother liquor comprises a carboxylic acid, water, a solvent, and a metal catalyst; and wherein said carboxylic acid comprises at least one compound selected from the group consisting of terephthalic acid, benzoic acid, p-toulic acid, isophthalic acid, trimellitic acid, naphthalene dicarboxylic acid, and 2,5-diphenyl-terephthalic acid.