Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1994-02-09
1995-01-03
Valentine, Donald R.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
C25C 700
Patent
active
053783409
ABSTRACT:
Silver is recovered from solutions containing the same, e.g. photographic processing solutions, in an electrolytic cell including an anode, a removable cathode and electrical connectors therefore on the exterior of the cell. The removable cathode is circular in configuration and encircles the anode. On the interior of the cell, electrical contact is made around the upper end of the cathode by means of an annular contact surface providing a large area of contact and minimizing the risk of occurrence of a corrosive connection. The upper end of the cathode is shaped for deformation, preferably in the form of castellations, and is clampingly pressed against the contact surface by a frusto-conical extension of the lid of the cell. The lid fits in threadwise engagement within the opening to the cell through which the cathode can be removed. As the lid is threaded into the cell opening, the frusto-conical extension thereof bears against the deformable cathode end portion and clamps the same against the contact surface. In this arrangement, the contact surface is situated above the level of the electrolyte in the cell so as to be protected against corrosion by the electrolyte.
REFERENCES:
patent: 3985634 (1976-10-01), Larson et al.
patent: 4028212 (1977-06-01), Bowen et al.
patent: 4439300 (1984-03-01), Houseman
patent: 4440616 (1984-04-01), Houseman
patent: 4840717 (1989-06-01), Dzodin
patent: 5203979 (1993-04-01), ffinger et al.
de Ruijter Dirk
Jansen Benny
Michiels Frank
Van de Wynckel Werner
AGVA-Gevaert N. V.
Daniel William J.
Valentine Donald R.
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