PROCESS FOR PREPARING PURIFIED 2,6-NAPHTHALENEDICARBOXYLIC ACID

摘要

A process for preparing purified 2,6-naphthalenedicarboxylic acid comprises hydrolyzing a dialkyl-2,6-naphthalenedicarboxylate with water at a reaction temperature of at least about 450 DEG F under liquid phase condition, the amount of water present being sufficient to solubilize, at the reaction temperature, at least about 10 percent of the 2,6-naphthalenedicarboxylic acid formed. This process provides for 2,6-naphthalenedicarboxylic acid having an average particle size of at least about 100 microns.