Silver recovery apparatus

Details Silver recovery apparatus Silver recovery apparatus

1980-03-31

1981-09-01

Tufariello, T. M.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204109, C25C 706, C25C 120

Patent

active

042870445

ABSTRACT:
A silver recovery apparatus for recovering silver from a solution containing silver ions, such as a photographic fixer bath, including an electrolytic recovery cell, a probe electrode located in a liquid conduit connecting a source of the solution to the cell, and a magnetic drive pump in the same liquid conduit between the probe electrode and the cell. The probe electrode senses the presence or absence of silver ions at the cathode of the cell and provides a signal that is used to regulate a pulsed plating current. The relative orientation of the probe electrode, magnetic drive pump and recovery cell, as well as the pulsation of the plating current, results in higher plating currents in the cell at high silver ion concentrations.

REFERENCES:
patent: 3551318 (1970-12-01), Snook
patent: 3616412 (1971-10-01), Guage
patent: 3616435 (1971-10-01), Favell
patent: 3658683 (1972-04-01), Lagier
patent: 3705716 (1972-12-01), Hendrickson
patent: 3875032 (1975-04-01), Thompson
patent: 3925184 (1975-12-01), Cave
patent: 3959110 (1976-05-01), Burgess
patent: 4009091 (1977-02-01), Washington
patent: 4018658 (1977-04-01), Alfin
patent: 4026784 (1977-05-01), Rivers
Instrumental Methods of Chemical Analysis, Ewing, G. W. 1960, pp. 225-229.
How to Use Pulse Plating to Obtain High Quality Precious Metal Deposits, Insulation/Circuits, Jan. 1977.
The Electrodeposition of Gold by Pulse Plating, Gold Bulletin, Apr. 1977.

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