Patent ID: 7834208

Claim:
A process comprising contacting a cooled carboxylic acid composition produced in a terephthalic acid production process, and a wash feed comprising water and/or acetic acid to a catalyst removal zone to form a post catalyst removal composition, and a catalyst rich liquor comprising cobalt, acetic acid and water; wherein said wash feed is at a temperature ranging from about 5° C. to about 90° C.; wherein said cooled carboxylic acid composition is at a temperature ranging from about 20° C. to about 60° C.; wherein said post catalyst removal composition has a catalyst composition of less than 500 ppm; wherein said catalyst removal zone has a wash ratio between about 0.2 and about 6; wherein said wash ratio is the mass of said wash feed divided by mass of solids in the cooled carboxylic acid composition; wherein said post catalyst removal composition comprises IPA in an amount ranging from 20 ppm to about 2000 ppm by weight on a dry solid basis.