POLYCARBOXYLIC ACID PRODUCTION SYSTEM EMPLOYING COOLED MOTHER LIQUOR FROM OXIDATIVE DIGESTION AS FEED TO IMPURITY PURGE SYSTEM

摘要

Disclosed is an optimized system for more efficiently and economically producing terephthalic acid. A solvent purification system is employed to remove of at least one aromatic impurity present in a solvent purification feed. At least about 20 weight percent of the solvent purification feed originates from a cooled, post-digestion, TPA-containing slurry.