PRODUCTION OF AROMATIC HYDROXYCARBOXYLIC ACID

摘要

PROBLEM TO BE SOLVED: To provide a method for obtaining a hydroxycarboxylic acid in a high yield by a low-temperature reaction. SOLUTION: An alkali metal salt of an aromatic hydroxyl compound (e.g.β-naphthol) is reacted with carbon dioxide in a solventless state under >=1 MPa pressure at <=100 deg.C under conditions except the supercritical conditions of carbon dioxide to produce an aromatic hydroxycarboxylic acid (e.g. 2- hydroxynaphthalene-1-carboxylic acid).