Chlorine dioxide generation for water treatment

Details Chlorine dioxide generation for water treatment Chlorine dioxide generation for water treatment

C - Chemistry, Metallurgy

25

B

C25B 1/26 (2006.01) B01D 61/00 (2006.01) C02F 1/44 (2006.01) C02F 1/467 (2006.01) C02F 1/76 (2006.01)

Patent

CA 2162471

Chlorine dioxide is generated by electrochemical oxidation of sodium chlorite in an anode compartment of a cation-exchange membrane-divided cell and is recovered in a suitable recipient medium by passing the chlorine dioxide through a hydrophobic microporous membrane. Water balance in a continuous operation is maintained by removing water from the anolyte by transporting the same partly across the hydrophobic microporous membrane in vapor form and partly across the cation-exchange membrane.

On produit du bioxyde de chlore par oxydation électrochimique de chlorite de sodium dans le compartiment anodique d'une cellule à plusieurs membranes échangeuses de cations. On récupère ce composé dans un milieu récepteur approprié après l'avoir fait passer à travers une membrane microporeuse hydrophobe. On maintient l'équilibre en eau dans un processus continu en extrayant l'eau de l'anolyte par passage de ce dernier pour partie sous forme de vapeur à travers la membrane microporeuse hydrophobe et pour partie à travers la membrane échangeuse de cations.

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