Electrowinning of Chlorine Dioxide

Titanium Anode for Production of Chlorine Dioxide


    Chlorine dioxide is made from sodium chlorate and is used for pulp bleaching. It is produced with high efficiency by reducing sodium chlorate in a strong acid solution with a suitable reducing agent such as methanol, hydrogen peroxide, hydrochloric acid or sulfur dioxide. Modern technologies are based on methanol or hydrogen peroxide, as these chemistries allows the best economy and do not co-produce elemental chlorine.

    The overall reaction can be written:

Chlorate + Acid + reducing agent → Chlorine Dioxide + By-products


    The reaction of sodium chlorate with hydrochloric acid in a single reactor is believed to proceed via the following pathway:

HClO3 + HCl → HClO2 + HOCl

HClO3 + HClO2 → 2 ClO2 + Cl2 + 2 H2O

HOCl + HCl → Cl2 + H2O

     Suzhou Borui supplies titanium anode for the production of ozone

  •     Substrate Material: Titanium
  •     Coating Material:  RuO + IrO
  •     Shape: Plate
  •     Size: can be customized