Electrolytic Production of Bromates

An electrolytic process for the production of potassium or sodium bromate using a pure lead peroxide anode has been operated successfully. A concentrated bromate solution was electrolyzed continuously at a cathode of stainless steel with an anodic current density of 20 amp/dm 2 at 70°C; current efficiency, about 90%; anode consumption about 50–60 mg/K amp‐hr. Pure crystalline bromate could be obtained by cooling the cell effluent at room temperature.