Electrochemical deionisation

Details Electrochemical deionisation Electrochemical deionisation

C - Chemistry, Metallurgy

02

F

C02F 1/469 (2006.01) B01D 61/48 (2006.01) B01J 47/08 (2006.01) C02F 1/62 (2006.01) C25B 9/00 (2006.01) C02F 1/42 (2006.01) C02F 1/46 (2006.01) C02F 1/461 (2006.01)

Patent

CA 2148320

An electrochemical cell (50) for deionisation utilises electrochemical ion-exchange to remove ions from a feed solution. Under the influence of an electric field, ions are adsorbed into, are stored within and pass through a permeable layer (54, 64) of particulate ion- absorbing material and binder, the sheet being several millimetres thick. Water from the feed solution also permeates through the layer (54, 64), so a concentrated solution of the ions emerges from the rear (58) of the layer. The cell does not require separate sources of feed and eluant solutions and can be operated substantially continuously. In a modified cell (70) the flow path for the feed solution passes through a highly porous ion exchanger structure (77), which may be located between two such microporous layers (54, 64). Absorption in such a cell may be effective in the absence of an electric field, elution requiring the periodic application of the electric field.

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