Method of manufacturing diaphragm element and diaphragm element

C - Chemistry – Metallurgy – 25 – C

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C25C 7/04 (2006.01)

Patent

CA 2540740

A diaphragm element of a cell for electroextraction of metals from aqua solutions and a method of manufacturing the diaphragm element are disclosed. A diaphragm ele-ment is formed from a diaphragm fabric and comprises at least one side surface with vertical edges and horizontal edges, wherein at least one edge of at least one side surface of the diaphragm element is formed with an electrically insulating edge portion having a predetermined width and specific electrical resistance of at least 5-fold compared to the specific electrical resistance of the middle portion of the side surface. The invention ensures reduced material and labor costs for manufacture and operation of diaphragm cells of electrochemical reactors, provides disturbance-free production cycle, and improves quality of the cathode metal.

L'invention concerne une membrane d'une cellule servant à l'extraction électrolytique de métaux à partir de solutions aqueuses, ainsi qu'un procédé de production de ladite membrane. Cette membrane est formée à partir d'un tissu et comprend au moins une surface latérale pourvue de bords horizontaux et verticaux. Au moins un bord d'au moins une surface latérale de la membrane est formée par une partie électro-isolante présentant une largeur prédéterminée et une résistance électrique spécifique au moins cinq fois supérieure à celle de la partie centrale de la surface latérale. L'invention permet de réduire les coûts matériels et les coûts de main-d'oeuvre pour la production et le fonctionnement de cellules à membrane de réacteurs électrochimiques, d'obtenir un cycle de production sans perturbation et d'améliorer la qualité du métal cathodique.

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