Patent ID: 8167974
Filing Date: 2012-05-01
Classification: B01J,C07C,Y02P

Abstract:
1. A terephthalic acid purge process comprising: (a) subjecting an oxidizer purge stream formed in a terephthalic acid process to evaporation in a 1 (b) adding water to said concentrated purge stream in a 1 (c) subjecting said water rich concentrated purge stream to evaporation in a 2 (d) adding water to the super concentrated purge slurry stream in a 2 (e) filtering said water rich super concentrated purge slurry in a solid-liquid separation zone to form a filter cake and mother liquor; (f) washing said filter cake with a wash feed in said solid-liquid separation zone to form a washed filter cake, and wash liquor; and (g) adding water to said mother liquor in a 3