METHOD FOR MAKING QUATERNARY AMMONIUM HYDROXIDE

摘要

PROBLEM TO BE SOLVED: To provide a method for making high-purity quaternary ammonium hydroxide containing anionic impurities to a lesser extent. SOLUTION: The method of making the quaternary ammonium hydroxide by electrolyzing the quaternary ammonium salt by using an electrolytic cell compartmentalized by a cation exchange membrane to an anode chamber and a cathode chamber, in which a weakly acidic salt of quaternary ammonium is added to the anode and the electrolysis is performed by maintaining the pH of an anolyte at 6 to 8. COPYRIGHT: (C)2004,JPO