Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Treating process fluid by means other than agitation or...
Patent
1998-08-07
2000-05-16
Gorgos, Kathryn
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Treating process fluid by means other than agitation or...
204237, 204DIG13, 205101, C25D 2118
Patent
active
060632526
ABSTRACT:
A method and apparatus for enriching the chromium concentration in an operating chrome plating from a spent chrome plating solution containing hexavalent chromium, trivalent chromium and extraneous metal ions is dislosed. A spent platining solution vessel is divided into an anode chamber and a cathode chamber by a porous container. A hollow primary anode is provided in the anode chamber and a plurality of cathodes are provided in the cathode chamber. A circularly shaped secondary anode is provided in the cathode chamber surrounding the cathodes and porous container. The primary anode and cathodes are connected to a primary electric circuit and the secondary anode and the cathodes are connected to a secondary electric. Operating solution from an operating plating vessel containing hexavalent chromium at a pre-enriched concentration is pumped to the anode compartment and hexavalent chromium enriched anolyte is flowed from the anode compartment to the operating plating vessel. The spent plating solution is the source of hexavalent chromium that enriches the solution in the anode compartment.
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Gorgos Kathryn
Leader William T.
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