Silver removal apparatus and method

Details Silver removal apparatus and method Silver removal apparatus and method

1981-05-21

1982-05-25

Hearn, Brian E.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75118R, 75118P, 266170, 428313, 428407, 428461, C22B 1100

Patent

active

043314732

ABSTRACT:
Silver is recovered from solutions such as photographic fixer solutions by contacting the solution with a metallic exchange medium. The metallic exchange medium comprises a plurality of buoyant elements, each comprising a substrate coated with iron. The substrate can be expanded polystyrene beads and the iron can be sponge iron of small particle size.

REFERENCES:
patent: 1568464 (1926-01-01), Neill
patent: 1617353 (1927-02-01), Snelling
patent: 3369801 (1965-11-01), Hartman
patent: 3640787 (1972-02-01), Heller
patent: 3692291 (1972-09-01), MacKay
patent: 4035181 (1977-07-01), Fisch
patent: 4039297 (1977-08-01), Takenaka
patent: 4156604 (1979-05-01), Fisch et al.

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