Electrolysis electrode and method for producing aqueous quaternary ammonium hydroxide solution using such electrolysis electrode

• Main Author: OHTA YOSHIRO,CHO TOSHITSURA
• Format: Patent
• Language: English
• Published: 29.08.2007
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; PERFORMING OPERATIONS; TRANSPORTING

Provided is an electrode for electrolysis with excellent corrosion resistance and durability which can be used sustainably in the production of a high-purity quaternary ammonium hydroxide by the electrolysis of a quaternary ammonium inorganic acid salt in an electrolytic cell partitioned by a cation exchange membrane on a commercial scale with reduced electric power consumption at low cost. The electrode for electrolysis is useful for the production of a quaternary ammonium hydroxide by the electrolysis of a quaternary ammonium inorganic acid salt in an electrolytic cell partitioned by a cation exchange membrane and comprises an electrode base material of an electrically conductive metal, an electrode active layer containing an electrode active material covering the electrode base material, and an intermediate layer of a mixed oxide of an oxide of at least one kind of metal selected from In, Ir, Ta, Ti, Ru, and Nb and an oxide of Sn disposed between the electrode base material and the electrode active layer.Disclosed is an electrolysis electrode with excellent corrosion resistance and durability which can be used for a long time for producing high-purity quaternary ammonium hydroxide by electrolyzing an inorganic acid salt of quaternary ammonium in an electrolysis vessel using a cation exchange membrane as the diaphragm. In addition, this electrolysis electrode contributes to reduce power consumption, thereby enabling to commercially produce high-purity quaternary ammonium hydroxide at low cost. Specifically disclosed is electrolysis electrode which is used when quaternary ammonium hydroxide is produced by electrolyzing an inorganic acid salt of quaternary ammonium in an electrolysis vessel using a cation exchange membrane as the diaphragm. This electrolysis electrode is characterized in that an electrode base made of a conductive metal is coated with an electrode active layer containing an electrode active material.