C - Chemistry – Metallurgy – 01 – G
Patent
C - Chemistry, Metallurgy
01
G
C01G 53/04 (2006.01)
Patent
CA 2235894
This process produces nickel hydroxide from elemental nickel. Introducing elemental nickel into at least a 4 N aqueous ammonia solution forms a mixture. Activating the nickel powder of this mixture allows the nickel to react with oxygen in the solution. This results in the dissolving of the nickel, producing a loaded solution containing nickel and hydroxyl ions. The redox potential of the solution remains negative during the dissolution of nickel. Distilling the loaded solution to vaporize the aqueous ammonia solution results in the precipitating of nickel hydroxide.
Ce procédé sert à produire de l'hydroxyde de nickel à partir de nickel élémentaire. L'introduction de nickel élémentaire dans une solution aqueuse d'ammoniaque au moins 4 N forme un mélange. L'activation de la poudre de nickel de ce mélange permet au nickel de réagir avec l'oxygène dans la solution. Il en résulte la dissolution du nickel, produisant ainsi une solution chargée contenant du nickel et des ions hydroxyles. Le potentiel d'oxydo-réduction de la solution demeure négatif pendant la dissolution du nickel. La distillation de la solution chargée pour vaporiser la solution aqueuse d'ammoniaque résulte en la précipitation de l'hydroxyde de nickel.
Babjak Juraj
Baksa Stephen Joseph
Bradford Raymond Augustus
Ettel Victor Alexander
Inco Limited
Smart & Biggar
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