反应详情

reacting at least one of 2,6-naphthalenedicarboxylic acid dipotassium salt and 2,6-naphthalenedicarboxylic acid monopotassium salt with a benzenecarboxylic acid of the formula ##STR6## wherein m is an integer from 1 to 6, n is an integer from 0 to 5, and m+ n is 1 to 6, in the presence of water at a temperature of 0°-200° C. to yield solid 2,6-naphthalenedicarboxylic acid and an aqueous solution of a benzenecarboxylic acid potassium salt of the formula ##STR7## b) separating the solid 2,6-naphthalenedicarboxylic acid from the aqueous solution; c) recovering the benzenecarboxylic acid potassium salt from the aqueous solution; d) reacting the benzenecarboxylic acid potassium salt with naphthalene to yield 2,6-naphthalenedicarboxylic acid dipotassium salt; and e) recycling the 2,6-naphthalene-dicarboxylic acid dipotassium salt to step a).