Chlorine Dioxide (ClO2) has been used as a bleaching chemical (for bleaching pulp) commercially for many years in Pulping Industries. Chlorine Dioxide production processes are based on the reduction of chlorate (using Cl-, CH3OH or SO2) in the presence of either sulphuric or hydrochloric acid where etching and corrosion occurs at the equipments used throughout the process.

Chlorine dioxide being very unstable compound are always produced on the site where it is used and the storage vessels require additional resistance to hold the chemical and must be controlled to minimize decomposition of the ClO2.

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