Electrochemical process utilizing alternating current for recove

Details Electrochemical process utilizing alternating current for recove Electrochemical process utilizing alternating current for recove

1975-09-24

1977-05-03

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

C25B 100

Patent

active

040213200

ABSTRACT:
The present invention relates to a method of electrochemically removing silver in the form of AgO from a photographic fixer solution containing silver ions without destroying the utility of the solution comprising the steps of applying alternating current having a frequency of between about 0.5 Hz and 800 Hz and a current density of between about 0.1 and 20 amperes per square inch across electrodes immersed in said solution to cause AgO to precipitate at the electrodes. The method can also be practiced above the range of about 20 amperes per square inch at the cost of destroying the utility of the solution. The method can also be used to remove silver in the form of AgO from other solutions.

REFERENCES:
patent: 748609 (1904-01-01), Hunt
patent: 3222128 (1965-12-01), Sooryn
patent: 3733256 (1973-05-01), Anderson
patent: 3793168 (1974-02-01), Lilly

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