Device for generating aqueous chlorine dioxide solutions

C - Chemistry – Metallurgy – 01 – B

Patent

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Details

C01B 11/00 (2006.01) C01B 11/02 (2006.01)

Patent

CA 2479215

The invention pertains to a device for generating aqueous chlorine dioxide solutions when the device is contacted with liquid water. The device comprises an alkali metal or alkaline earth metal chlorite, e.g., sodium chlorite, and a chemical reagent comprising an acid or a material capable of releasing an acid upon exposure to liquid water, e.g., sodium bisulfate. The chlorite and the reagent are either combined as a mixture or are disposed as separate components adhered to the surface of one or more substrates. Upon exposure to liquid water, the chlorite and the reagent produce boundary layers. The chlorite and the reagent are disposed upon, and adhered to, the surface(s) of the substrates in a manner such that upon exposure to liquid water, the chlorite boundary layer comes into contact with the reagent boundary layer to thereby produce an aqueous chlorine dioxide solution.

Cette invention concerne un dispositif pouvant produire des solutions aqueuses de dioxyde de chlore lorsqu'il est placé au contact de l'eau liquide. Le dispositif comprend un métal alcalin ou un chlorite de métal alcalino-terreux, tel que le chlorite de sodium, et un réactif chimique comprenant un acide ou une matière pouvant libérer un acide, lorsqu'elle est exposée à l'eau liquide, telle que le bisulfate sodium. Le chlorite et le réactif sont soit combinés pour former un mélange, soit utilisés comme constituants séparés fixés à la surface d'un ou de plusieurs substrats. Après exposition à l'eau liquide, le chlorite et le réactif produisent des couches limites. Le chlorite et le réactif sont disposés sur et fixés à la (aux) surface(s) des substrats de sorte que, après exposition à l'eau liquide, la couche limite du chlorite vient au contact de la couche limite du réactif pour produire une solution aqueuse de dioxyde de chlore.

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