PROCESS FOR PRODUCING a-HYDROXY ACID

摘要

A process for producing an a-hydroxy acid that is economically advantageous without the secondary production of a large volume of waste, having satisfactory quality as a polymer raw material. The process for producing an a-hydroxy acid comprises the steps of adding a basic metal to an ammonium salt of a-hydroxy acid to thereby obtain a metal salt of a-hydroxy acid and converting the metal salt of a-hydroxy acid to an a-hydroxy acid.