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

1995-03-13

1996-08-13

Gorgos, Kathryn

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

429105, 429223, C01B 1314, C01G 5304

Patent

active

055453929

ABSTRACT:
The invention provides a method of producing nickel hydroxide from elemental metal. Elemental nickel is first introduced into an aqueous ammonia or ammonia/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.

REFERENCES:
patent: 5384216 (1995-01-01), Teraoka et al.
patent: 5391265 (1995-02-01), Krynitz et al.
Xia et al., Studies on the Kinetics of Nickel Dissolution in Aqueous Ammoniacal Solutions, Inst. Chem. Metall. Acad. Sin., Peking Peop. Rep. China pp. 290-301; 1980 no month available translation pp. 1-28 (only).
Xia et al., Studies on the Kinetics of Nickel Dissolution in Aqueous Ammoniacal Solutions, Inst. Chem. Metall., Acad. Sin., Peking, Peop. Rep. China pp. 290-301; 1980 no month available.
Xia et al., Studios on the Kinetics of Ni Dissolution in Aqueous Ammoniacal Solution, Institute of Chemical Metallurgy, Academia, Sinica, pp. 290-301 (1980) no month available.

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