Formation of sodium chlorate in diaphragmed chlorine electrolyzers

This paper examines the formation of sodium chlorate under conditions of diaphragmed electrolysis with ruthenium-titanium oxide anodes. The authors establish that the sodium chlorate is formed chemically in such an electrolyzer. The data indicate that effective methods of reducing the amounts of sodium chlorate in diaphragm chlorine electrolyzers are to supply an acidified brine and to ensure catalytic decomposition of hypochlorous acid and sodium chlorate directly in the electrolyzer