Device and method for regenerating an electroless metal...

C - Chemistry – Metallurgy – 23 – C

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C23C 18/16 (2006.01) B01D 61/44 (2006.01) B01D 61/52 (2006.01) B01D 61/58 (2006.01) C02F 1/42 (2006.01) C02F 1/469 (2006.01)

Patent

CA 2484799

In regenerating an electroless metal plating bath by electrodialysis, it has been found that the metal of the metal plating bath deposits in the electrolysis arrangement. To overcome this problem, an improvement to prior art regenerating devices is suggested, said improvement consisting in providing main cation exchangers for removing ions of this metal from a concentrate fluid. The main cation exchangers are coupled to the concentrate compartments of the electrolysis arrangement in such a manner that the concentrate fluid flowing through the concentrate compartments is allowed to pass through the main cation exchangers and to be recirculated back into the concentrate compartments.

Lors de la régénération d'un bain de dépôt autocatalytique de métal par électrodialyse, il s'est avéré que le métal du bain de dépôt de métal se dépose dans le dispositif d'électrolyse. Pour venir à bout de ce problème, on propose une amélioration aux appareils de régénération selon l'état actuel de la technique, l'amélioration consistant en une utilisation d'échangeurs de cations principaux pour éliminer d'un fluide concentré les ions de ce métal. Les échangeurs de cations principaux sont couplés aux compartiments à concentrés du dispositif d'électrolyse de façon que le fluide concentré passant par les compartiments à concentré puisse traverser les échangeurs de cations principaux et revenir dans les compartiments à concentré.

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