Process for improving the purity of transition metals...

C - Chemistry – Metallurgy – 25 – C

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204/46.1

C25C 3/26 (2006.01) C25C 7/06 (2006.01)

Patent

CA 1268446

PRECIS DE LA DIVULGATION: Procédé d'amélioration de la pureté des métaux de transition obtenus par électrolyse de leurs halogénures en bain de sels fondus dans une cuve à paroi interne métallique. Le procédé est caractérisé par ce que l'on impose en perma- nence à la cuve un potentiel cathodique par rapport à l'anode de la cellule. L'invention trouve son application dans la fabrication de métaux, tels que notamment le titane, le zirconium, l'hafnium, le vanadium, le niobium, le tantale, à faible teneur en oxygène et en éléments métalliques étrangers.

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