Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1977-12-09
1978-12-26
Ozaki, G.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75100, 75108, 75 05A, C22B 1104
Patent
active
041314557
ABSTRACT:
Method for recovering pure silver from acid insoluble silver salt contaminated with other metals by first washing the salt with water at a pH less than 3 and then reacting the washed salt with alkali metal borohydride at a pH greater than 12.
REFERENCES:
patent: 2752237 (1956-06-01), Short
patent: 3334995 (1967-08-01), Gaspar
patent: 3369886 (1968-02-01), Metzger et al.
patent: 3658510 (1972-04-01), Hoffmann et al.
patent: 3940261 (1976-02-01), Dannelly et al.
Edwards Lars T.
Trowbridge Lyle N.
GAF Corporation
Kehm Walter C.
Ozaki G.
Ward Joshua J.
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