Process and apparatus for treating photographic fixing baths

Details Process and apparatus for treating photographic fixing baths Process and apparatus for treating photographic fixing baths

1981-02-23

1983-03-22

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204231, C25B 1502, C25C 122

Patent

active

043774563

ABSTRACT:
The process for treating a photographic fixing bath, in order to remove therefrom the silver in metallic form by electrolysis in an electrolysis cell comprising at least one cathode on which the silver is deposited, two anodes and a control electrode placed in the vicinity of the cathode, comprises the step of adjusting the intensity of the electrolysis current by measuring the potential difference between a cathode serving as a working electrode and the control electrode.
The apparatus for treating a photographic fixing bath in order to remove therefrom the silver comprises an electrolytic cell containing, as electrodes, at least one cathode and anodes as well as a control electrode made of pure carbon immersed in a stirred electrolytic bath, the voltage of this control electrode being maintained at a constant reference value and the potential on this control electrode serving to control the electrolysis current in operation.

REFERENCES:
patent: 4186067 (1980-01-01), Blake et al.
patent: 4287044 (1981-09-01), Biles et al.

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