Method for starting a chlor-alkali diaphragm cell

C - Chemistry – Metallurgy – 25 – B

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204/57.1

C25B 1/46 (2006.01) C25B 15/00 (2006.01)

Patent

CA 2223854

Describes adding an anolyte soluble amphoteric material, e.g., an aluminum compound, to the anolyte of a chlor-alkali diaphragm cell having a synthetic diaphragm during the start-up period of the cell to reduce the permeability of the diaphragm. Complementary inorganic porosity modifying materials, e.g., magnesium materials such as magnesium chloride, and clays are also added to the anolyte during the start-up period of the cell.

Addition d'un matériau amphotère soluble dans l'anolyte, par exemple d'un composé d'aluminium, à l'anolyte d'une cellule à diaphragme chlore-alcali comportant un diaphragme synthétique au cours de la période de démarrage de la cellule, afin de réduire la perméabilité du diaphragme. Des matériaux inorganiques complémentaires modifiant la porosité, par exemple du chlorure de magnésium, et des argiles sont également ajoutés à l'anolyte au cours de la période de démarrage de la cellule.

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