To provide a method for producing 2,6-naphthalenedicarboxylic acid by which a substance inhibiting an oxidizing reaction can be prevented from accumulating and a high yield can be maintained when circulating an oxidizing reaction mother liquor for use in the liquid-phase oxidizing reaction of 2,6- dimethylnaphthalene.
The total amount of cobalt and manganese which are catalyst components is 50-300 mg atoms based on 1 g atom 2,6-dimethylnaphthalene at an atomic ratio of the manganese to the cobalt of (1:20) to (1:4) and an oxidizing reaction is carried out at 200-250°C temperature in a method for oxidizing the 2,6-dimthylnaphthalene with an oxygen-containing gas in the presence of a catalyst containing the cobalt, manganese and bromine in a solvent containing a lower aliphatic carboxylic acid and producing 2,6- naphthalenedicarboxylic acid.
INARI MASAHITO
MACHIDA HIROSHI
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