PROCESS FOR SELECTIVE PRODUCTION OF 2-HYDROXYNAPHTHALENE-6-CARBOXYLIC ACID

摘要

A process for the selective production of 2-hydroxynaphthalene-6-carboxylic acid, which comprises continiously reacting potassium beta -naphtholate with carbon dioxide at a reaction temperature in the range of 230 to 350 DEG C and under a carbon dioxide pressure suitable for the reaction temperature and selected within the range of 1 to 20 kg/cm<2> (G) while removing the by-product beta -naphthol by using a reaction medium having a specific gravity of 0.6 to 1.5 and being capable of dissolving beta -naphthol but substantially incapable of dissolving potassium beta -naphtholate.