Process for producing 2,6-naphthalenedicarboxylic acid

Details Process for producing 2,6-naphthalenedicarboxylic acid Process for producing 2,6-naphthalenedicarboxylic acid

1988-04-05

1989-10-10

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562417, 562488, C07C 51265

Patent

active

048733660

ABSTRACT:
Disclosed in the present invention is a process for producing 2,6-naphthalenedicarboxylic acid comprising oxidizing 2,6-diisopropylnaphthalene or its partially oxidized intermediate with molecular oxygen in a solvent containing at least 50% by weight of an aliphatic monocarboxylic acid, having not more than three carbon atoms, in the presence of a catalyst composed of (i) a heavy metal comprising cobalt and/or manganese and (ii) bromine, and a salt of an inorganic acid having an acid dissociation constant Ka smaller than 1.34.times.10.sup.-5 (at 25.degree. C.) and a vapor pressure lower than that of the aliphatic monocarboxylic acid used as the solvent. According to the process of this invention, 2,6-naphthalenedicarboxylic acid of high bulk density can be obtained in a high yield and with high purity.

REFERENCES:
patent: 4709088 (1987-11-01), Hirose et al.
patent: 4716245 (1987-12-01), Hirose

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