Recovery of silver from hypo

Details Recovery of silver from hypo Recovery of silver from hypo

1977-08-22

1979-09-04

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204228, 204275, C25C 120, C25C 700, C25C 702

Patent

active

041667816

ABSTRACT:
Means to plate silver from photographic hypo combines an electrolytic cell having a plating cathode with means to feed hypo solution to the cell at various constant volume supply rates and with means to supply electric energy to the cell comprising means to restrict and maintain the voltage and amperage thereof within maximum values to various constant rates corresponding to the respective constant hypo supply rates. In the cell hypo supply first moves slowly in heat-absorbing contact with a non-plating portion of the cathode, then into a plating zone.

REFERENCES:
patent: 2110930 (1938-03-01), Doffin
patent: 3524805 (1970-08-01), Engelman
patent: 3715291 (1973-02-01), Bentley
patent: 3767558 (1973-10-01), Rowe
patent: 3959110 (1976-05-01), Burgess
patent: 4018658 (1977-04-01), Alfin et al.

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