Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Reexamination Certificate
2006-05-30
2006-05-30
King, Roy (Department: 1742)
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
Reexamination Certificate
active
07052528
ABSTRACT:
The present invention provides a method for the removal of substantially all the amount of Mn contained in cobalt containing solution thereby to obtain purified cobalt solution with Mn content of 10 ppm or less and specifically a method for removing Mn from cobalt sulfate solution comprising the steps of adjusting pH of the solution within the range of 3–6 and then adding the NaOCl to the solution to obtain an oxidation-reduction potential in the range of 1100 to 1300 mV, with respect to standard hydrogen electrode (SHE); and removing Mn precipitate from thus treated solution.
REFERENCES:
patent: 2822243 (1958-02-01), Brix
patent: 0 630 856 (1994-12-01), None
patent: 357140838 (1982-08-01), None
patent: 2002-241856 (2002-08-01), None
Babjak Juraj
Imai Miyuki
Kikkawa Tomoaki
King Roy
McNeils Kathleen
Seido Chemical Industry Company, Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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