Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1980-10-20
1981-12-01
Ozaki, G.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75118R, 75118P, C22B 1104
Patent
active
043034411
ABSTRACT:
A method for recovering a metal from a solution containing ions of the metal and a complexing agent for the ions is disclosed. The method involves contacting the solution with another metal more electropositive than the metal to be recovered in order to bring about a metal-metal exchange reaction which will yield a precipitate of the metal to be recovered. The precipitate is then separated from the solution. In order to maximize the yield of the metal-metal exchange reaction, the redox potential of the solution is measured during the course of the reaction, and the precipitate is separated from the solution as soon as the redox potential substantially reaches a predetermined minimum value.
REFERENCES:
patent: 2194056 (1940-03-01), Quaglia
patent: 2214765 (1940-09-01), Holzwarth
patent: 3490899 (1970-01-01), Krivsky et al.
patent: 3616412 (1971-10-01), Guage
patent: 3705716 (1972-12-01), Hendrickson
patent: 4008077 (1977-02-01), Wallace
patent: 4065313 (1977-12-01), Shippey
patent: 4211630 (1980-07-01), Blake et al.
Eastman Kodak Company
Janci D. F.
Ozaki G.
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