Method for reduction of nickel

Details Method for reduction of nickel Method for reduction of nickel

B - Operations, Transporting

22

F

B22F 9/24 (2006.01) C22B 3/44 (2006.01) C22B 5/00 (2006.01) C22B 23/00 (2006.01)

Patent

CA 2390359

The invention relates to a method for the precipitation of nickel from its aqueous solution as a metal powder using hydrogen. The aqueous solution containing nickel compounds is neutralised first with an earth alkali or alkali compound so the nickel precipitates as nickel hydroxide or as an alkaline salt, after which reduction is performed in the presence of a catalyst in ion form in atmospheric or close to atmospheric conditions preferably as a continuous process.

L'invention concerne un procédé relatif à la précipitation du nickel, avec de l'hydrogène, à partir d'une solution aqueuse dans laquelle le nickel se présente sous la forme d'une poudre métallique. On neutralise la solution aqueuse renfermant des composés au nickel, avec un composé alcalino-terreux ou alcalin, de manière à précipiter le nickel sous forme d'hydroxyde de nickel ou de sel alcalin, puis la réduction s'effectue en présence d'un catalyseur sous forme ionique dans des conditions atmosphériques ou proches, de préférence en continu.

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