Patent ID: 6589492
Filing Date: 2003-07-08
Classification: B01J,C07C,Y02P

Abstract:
A process for recovering components of a catalyst from a mother liquor of liquid phase oxidation in production of aromatic carboxylic acids by liquid phase oxidation of aromatic hydrocarbons having substituents with a gas containing oxygen in a presence of a catalyst comprising cobalt, manganese and bromine in acetic acid or acetic acid containing water as a solvent, which process comprises the steps of:(1) adding a compound generating an ion of an alkali metal to the mother liquor of liquid phase oxidation obtained after separating crystals of the aromatic carboxylic acid from a reaction fluid of the liquid phase oxidation, (2) bringing the mother liquor containing the compound generating an ion of an alkali metal into contact with a weakly basic anion exchange resin at 30Â° to 100Â° C. so that the components of the catalyst are adsorbed to the anion exchange resin and (3) recovering the components of the catalyst comprising cobalt, manganese and bromine ion by passing an elution liquid through the anion exchange resin.