Silver recovery

Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium

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Details

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.

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