Process for producing nickel hydroxide from elemental nickel

Details Process for producing nickel hydroxide from elemental nickel Process for producing nickel hydroxide from elemental nickel

C - Chemistry, Metallurgy

01

G

C01G 53/04 (2006.01)

Patent

CA 2145155

The invention provides a method of producing nickel hydroxide from elemental metal. Elemental nickel is first introduced into an aqueous ammonia orammonia/ammonium salt solution capable of dissolving nickel. The potential, as measured by a standard calomel electrode, is allowed to reach a negative or reducing level. Oxygen is added to the aqueous solution at a rate that maintains the negative potential to facilitate the conversion of elemental nickel to nickel hydroxide. Nickel hydroxide may be readily precipitated from the aqueous solution.

Cette invention constitue une méthode de production d'hydroxyde de nickel à partir d'un métal élémentaire. Le nickel élémentaire est d'abord introduit dans de l'ammoniaque liquide ou dans une solution de sel d'ammonium capable de dissoudre le nickel. Le potentiel, tel que mesuré par une électrode au calomel standard, peut atteindre un niveau négatif ou réducteur. De l'oxygène est ajouté à la solution aqueuse à un taux qui maintien le potentiel négatif dans le but de faciliter la conversion du nickel élémentaire en hydroxyde de nickel. L'hydroxyde de nickel peut être rapidement précipité à partir d'une solution aqueuse.

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