Process for the preparation of naphthalene carboxylic acids

Details Process for the preparation of naphthalene carboxylic acids Process for the preparation of naphthalene carboxylic acids

1989-12-19

1991-10-08

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

562417, 562488, C07C 51265

Patent

active

050556126

ABSTRACT:
A process for the preparation of naphthalene mono or polycarboxylic acids, such as 2,6-naphthalene dicarboxylic acid, is disclosed which includes oxidizing a naphthalene compound such as 2,6-diisopropylnaphthalene in a specific solvent with molecular oxygen in the presence of a catalyst containing a heavy metal compound and a bromine compound. The solvent is an aliphatic monocarboxylic acid and may further contain benzene and/or water. By controlling the ratio of the amount of catalyst metal to the feed rate of the raw material naphthalene compound, the yield of desired product can be controlled.

REFERENCES:
patent: 4709088 (1987-11-01), Hirose et al.
patent: 4716245 (1987-12-01), Hirose
patent: 4754060 (1988-06-01), Hayashi et al.

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