Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Preparing single metal
Patent
1996-07-08
1998-06-23
Phasge, Aron S.
Electrolysis: processes, compositions used therein, and methods
Electrolytic synthesis
Preparing single metal
205702, 205771, 204228, 204231, C25C 120, C25C 706
Patent
active
057700346
ABSTRACT:
An apparatus for desilvering silver-containing solutions comprises an electrolytic cell (10) having an anode (20), a cathode (30) and a reference electrode (45) positioned adjacent the cathode (30), and electrical power supply control means (41) for controlling the supply of electrical power to the anode (20) and the cathode (30). The power supply control means (41) includes means (60) for adjusting the cathode potential and control means (70) linked to said adjustment means (60) to reduce the cathode potential, at least periodically, as the desilvering process continues. The process leads to better silver adhesion on the cathode occurs, while maintaining good desilvering levels in the solution, and cathode poisoning is minimised.
REFERENCES:
patent: 4018658 (1977-04-01), Alfin et al.
patent: 4362608 (1982-12-01), Biles et al.
patent: 4377456 (1983-03-01), DeMeester et al.
patent: 4612102 (1986-09-01), Brimo et al.
patent: 4978433 (1990-12-01), Iwano et al.
patent: 5118402 (1992-06-01), Engels et al.
Frank Michiels
Jansen Benedictus
Ketels Fernand
Smet Paul
Van de Wynckel Werner
AGFA-GEVAERT N.V.
Phasge Aron S.
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