| abstract |
(57) Abstract: Provided is a method for industrially and advantageously producing high-purity 2,6-naphthalenedicarboxylic acid from which residual nitrogen components have been removed. Kind Code: A1 A purified 2,6-naphthalene obtained by converting a crude 2,6-naphthalenedicarboxylic acid obtained from an oxidation reaction of a 2,6-alkylnaphthalene into an amine salt or an ammonium salt, and then decomposing the amine salt or the ammonium salt. The dicarboxylic acid is washed with an alcohol. |