Patent ID: 6284920
Filing Date: 2001-09-04
Classification: C07C,C08G,Y10T

Abstract:
A process for producing a naphthalenic dicarboxylic acid monomer product suitable for the manufacture of polyesters, said process comprising the steps of:oxidizing a naphthalenic feedstock to produce a crude naphthalenic dicarboxylic acid;slurrying the crude naphthalenic dicarboxylic acid at a temperature between about 60 and 125 degrees Centigrade to produce a naphthalenic dicarboxylic acid monomer product comprising at least 90 mole percent of the acid monomer and one or more process-related materials selected from the group consisting of between 50 and 5,000 ppm of monofunctional materials, between 50 and 10,000 ppm of trifunctional materials, between 50 and 500 ppm of color bodies, and between 50 and 10,000 ppm of metals.