Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1984-09-13
1985-09-17
Stallard, Wayland
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 05AA, 75117, 75119, C22B 1512, C22B 2304
Patent
active
045418616
ABSTRACT:
Cobalt, nickel and copper powders are produced from chelating extractants by reacting with hydrogen a liquid organic medium containing in solution a quinoline-based chelating extractant having bonded thereto a metal selected from the group consisting of cobalt, nickel and copper, and a hydrogenation inhibitor consisting of a linear or branched aliphatic alcohol containing from 7 to 13 carbon atoms, at a temperature of about 150.degree. to about 350.degree. C. and a pressure of about 50 to about 600 p.s.i. to cause precipitation of the metal in powder form while preventing decomposition of the chelating extractant, the liquid organic medium further containing a seed of the precipitating metal whereby to avoid undesirable deposition of the metal in plated form. The metal precipitates stoichiometrically with simultaneous regeneration of the chelating extractant which can thus be recycled for reloading with the metal to be precipitated. Since the metal is precipitated directly from the liquid organic medium, the process of the invention avoids electrowinning and therefore saves on energy, in addition to producing a product of high purity.
REFERENCES:
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Burkin, A. R., Proceedings of the Richardson Conference: "Physical Chemistry of Process Metallurgy", published by the Institution of Mining and Metallurgy, London, England, pp. 43-47.
Burkin, A. R. Proceedings of Royal Society, London, England, A 338, pp. 419-437, (1974).
Demopoulos, G. and Distin, P. A., Proceedings of the International Solvent Extraction Conference, Sep. 1980, Liege, Belgium.
Demopoulos, G. and Distin P. A., J. Chem. Tech. Biotechnol., 1983, 33A, pp. 249-260.
Demopoulos George P.
Distin Philip A.
Stallard Wayland
The Royal Institution for the Advancement of Learning (McGill Un
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