Hydrogen evolution inhibiting additives for zinc electrowinning

Details Hydrogen evolution inhibiting additives for zinc electrowinning Hydrogen evolution inhibiting additives for zinc electrowinning

C - Chemistry, Metallurgy

25

C

C25C 1/16 (2006.01)

Patent

CA 2457071

A cetylpyridinium salt, cetylpyridinium chloride (CPC) is used as a hydrogen evolution inhibitor (a current efficiency improver) in a commercial zinc electrowinning process. Zinc electrowinning compositions containing a) antimony and b) antimony and glue were tested. Adding CPC at a 0.05mM concentration to the electrowinning liquor resulted in increased current efficiency for both electrolytes.

On utilise une sel de cétylpyridinium, à savoir du chlorure de cétylpyridinium (CPC) comme inhibiteur de l'évolution de l'hydrogène (un agent d'amélioration de l'efficacité du courant) dans un procédé commercial d'extraction électrolytique de zinc. Des compositions d'extraction électrolytique de zinc contenant (a) de l'antimoine et (b) de l'antimoine et de la colle ont été testées. En ajoutant du CPC à une concentration de 0.05mM à la liqueur d'extraction électrolytique de zinc, on a pu obtenir une meilleure efficacité du courant pour les électrolytes.

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