PROCESS FOR PREPARATION OF 2-HYDROXYNAPHTHALENE-3-CARBOXYLIC ACID

摘要

A process for preparing 2-hydroxynaphthalene-3-carboxylic acid which comprises reacting a mixture being liquid under the reaction conditions and consisting of (1) potassium beta -naphtholate, (2) beta -naphthol and (3) at least one reaction medium selected from the group consisting of aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons and aromatic ethers with carbon dioxide at a reaction temperature of at least 180 DEG C and a carbon dioxide pressure of at least 1 kg/cm<2>.