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

1997-04-28

1998-10-20

Bos, Steven

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423141, C01B 1314, C01G 5300

Patent

active

058242830

ABSTRACT:
This process produces nickel hydroxide from elemental nickel. Introducing elemental nickel into at least a 4N 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.

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Marioka et al., "Studies on the Ammonia Pressure Leaching of Metallic Nickel and Copper Powders," Trans. Japan Institute of Metals, vol. 12(1971) pp. 197-205, No Month.
Shimakage et al., "Fundamental studies on the ammonia pressure leaching of metallic nickel powder," Institution of Mining and Metallurgy, vol. 80, (Dec. 1971) pp. C228-C234.
Translation PTO 96-2274, Xia et al., "A Study of the Kinetics of the Dissolution of Ni in Ammiacal Solutions," Jinshu Xuebao, vol. 16, No. 3, Sep. 1980, pp. 290-300.

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