PROCEDIMENTO PER PRODURRE METIONINA INCOLORE

摘要

Methionine devoid of a coloring matter can be obtained from the aqueous solution of alkali salts of methionine prepared by hydrolysis of 5-( beta -methylmercaptoethyl)-hydantoin with an alkali by decolorizing the said solution with reducing sulfur compound and thereafter collecting methionine as colorless crystals.