Chlorine Dioxide

Chlorine dioxide is the most important chemical used in a modern chemical pulp bleaching process. It is produced from sodium chlorate, typically at the pulp mill. We provide alternative operative and process solutions for chlorine dioxide supply, offering our customer the ideal concept.

Chlorine dioxide is the principal chemical used in the environmentally preferred ECF chemical pulp bleaching process. It functions via oxidative reactions thus virtually eliminating the formation of chlorinated organic compounds. Chlorine dioxide attacks the aromatic ring of the lignin, but does not react with carbohydrates thus preserving pulp yield and giving superior pulp strength compared to other oxidants.

An integrated process is used featuring on-site sodium chlorate production at our Kuusankoski and Fray Bentos sites. The product is delivered in pipeline to the near-by pulp mill in an efficient just-in time supply chain.

Chlorine dioxide is also increasingly being used as an efficient disinfectant in industrial and municipal water treatment. Chlorine dioxide is an effective biocide at concentrations as low as 0,1 ppm and over a wide pH range. By using chlorine dioxide in potable water treatment the formation of harmful by-products like THM's is minimized.

Chlorine dioxide is an extremely powerful oxidant, biocide and disinfecting agent. It is toxic to micro-organisms, which is why it is a good water disinfectant.