Chlor-alkali an industry that produced chemicals in the form of Caustic soda (NaOH). Caustic production at the chlor-alkali plant carried out by electrolysis process. During the electrolysis process there is the formation of a side reaction in the electrolyzer forming sodium chlorate (NaClO3) in the weak brine. Chlorate an undesirable substance because it can damage the resin in the ion exchang…