Nickel recovery process and compositions for use therein

Details Nickel recovery process and compositions for use therein Nickel recovery process and compositions for use therein

1999-08-12

2001-07-17

Bos, Steven (Department: 1754)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

C423S140000, C423S144000, C423S150100, C205S589000

Reexamination Certificate

active

06261526

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to the recovery of nickel from nickel ores.
2. Statement of Related Art
The extraction of nickel from nickel ores in which acid leach solutions are obtained from treatment of the ores with an acidic compound such as sulfuric acid is known. However, there is to date no simple effective solvent extraction process for the recovery of nickel from acid leach solutions such as acid leach sulfate solutions.
SUMMARY OF THE INVENTION
The present invention relates to an improved process for the extraction of nickel from nickel ores, especially nickel laterite ores; to improved reagents for the extraction of nickel values from aqueous ammoniacal leach solutions; and to an improved process for preparing ketoximes which are used alone or in combination with aldoximes as the extraction reagents. The use of the improved extractants of the invention in organic solvents for the extraction of nickel values from aqueous ammonium leach solutions results in less transfer of ammonia to the organic solvent extractant solution than is obtained with the use of organic solvent solutions of such extractants produced by known processes.


REFERENCES:
patent: 3224873 (1965-12-01), Swanson
patent: 4020105 (1977-04-01), Ackerley et al.
patent: 4020106 (1977-04-01), Ackerley et al.
patent: 4085146 (1978-04-01), Beswick
patent: 4173616 (1979-11-01), Koenders et al.
patent: 5855858 (1999-01-01), Jones
patent: 5976218 (1999-11-01), Virnig et al.

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