Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1981-03-05
1983-01-04
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204106, C25C 112
Patent
active
043671284
ABSTRACT:
The present invention is predicated upon the discovery that in the electrowinning of copper from solutions thereof, a hydrogen fed porous catalytic anode can be caused to operate under such conditions of constant current flow whereby a dynamic equilibrium will be imposed upon the hydrogen fed anode so that the anode will behave as a normal copper anode in a refining mode. This is particularly true when such a hydrogen fed anode is deactivated by copper buildup on the surface of the electrode.
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patent: 3124520 (1964-03-01), Juda
patent: 3793165 (1974-02-01), Juda et al.
patent: 3994789 (1976-11-01), Langer et al.
patent: 4207153 (1980-06-01), Flood
Metal Finishing Guidebook Directory, 1968, p. 264, (Published by Metals & Plastics Publications, Inc.).
International Publication No. WO81/01159, International Appl. No. PCT/US80/01469, "Process and Apparatus for Producing Metals at Porous Hydrophobic Catalytic Barriers", Prototech Company, Walter Juda, Robert J. Allen, Robert Lindstrom.
Batzold John S.
Hoffmann James E.
Andrews R. L.
Dvorak Joseph J.
Exxon Research and Engineering Co.
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