METHOD FOR PRODUCTION OF 2-HYDROXYNAPHTHALENE-6-CARBOXYLIC ACID

摘要

The present invention is directed to a method of manufacturing 2-hydroxynaphthalene-6-carboxylic acid wherein .beta.-naphtholpotassium and carbon dioxide, in the presence of a reaction medium that substantially does not dissolve the .beta.-naphtholpotassium under heat and pressure, are reacted with the simultaneous transference of .beta.-naphthol produced and water existing in a reaction system to a vapor phase and elimination thereof from the reaction system. The method of the present invention results in improved yields and selective ratio of the 2-hydroxynaphthalene-6-carboxylic acid.