反应详情

A process for preparing 2,6-naphthalenedicarboxylic acid which comprises a) reacting 2,6-naphthalenedicarboxylic acid dipotassium salt with phthalic acid monopotassium salt in the presence of water at a temperature of 0°-200° C. to yield solid 2,6-naphthalenedicarboxylic acid monopotassium salt and an aqueous solution of a phthalic acid dipotassium salt; b) separating the solid 2,6-naphthalenedicarboxylic acid monopotassium salt from the aqueous solution containing phthalic acid dipotassium salt; c) reacting the 2,6-naphthalenedicarboxylic acid monopotassium salt with phthalic acid in the presence of water at 0°-200° C. to yield solid 2,6-naphthalenedicarboxylic acid and an aqueous solution of phthalic acid monopotassium salt; d) separating solid 2,6-naphthalenedicarboxylic acid from the aqueous solution containing phthalic acid monopotassium salt; and e) recycyling the aqueous solution containing phthalic acid monopotassium salt to step a).

1. customat a temperature of 0°-200° C.