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| Number | Title | Issue Date |
| 7384533 | Electrolytic processes with reduced cell voltage and gas formation Electrolytic solutions containing organic additive(s) selected from a described class of additives (e.g., 4,6-dihydroxypyrimidine) reduce overall applied electrical potential of electrolytic cells and/or reduce gas formation at the anode(s) or increase copper produc... | 06/10/2008 |
| 7258778 | Electrocatalytic coating with lower platinum group metals and electrode made therefrom The present invention relates to an electrocatalytic coating and an electrode having the coating thereon, wherein the coating is a mixed metal oxide coating, preferably platinum group metal oxides, with or without low levels of valve metal oxides. The electrocatalyt... | 08/21/2007 |
| 6998029 | Anodic protection systems and methods Various systems and methods for protecting electrowinning anodes having electrocatalytically active coatings in a bank of electrolytic cells from being damaged by reverse currents. In the first embodiment, one or more auxiliary power sources are provided that, when ... | 02/14/2006 |
| 6368489 | Copper electrowinning There is disclosed a method for copper electrowinning and a modified lead electrode for use in such method. The modified electrode is suitable for use as an oxygen anode in low current density, oxygen-evolving applications.... | 04/09/2002 |
| 4604173 | Low oxygen overvoltage lead anodes Anodes made of lead or lead alloys, used for the evolution of oxygen from sulphuric acid solutions, particularly in metal electrowinning processes, are made more catalytic by treating them in an oxidizing bath of hydrated molten salts, in particular compr... | 08/05/1986 |
| 4584082 | Method and apparatus for acid mist reduction Bubbles produced at an electrode in an electrolytic process are coalesced by providing a surface-limiting, electrically inert masking device of which at least a bottom portion is submerged in the electrolyte. The masking device reduces the free surface of... | 04/22/1986 |
| 4484990 | Mist suppressant for solvent extraction metal electrowinning The formation of acid mist or spray over metal electrowinning tanks, such as in the electrowinning of copper obtained by solvent extraction, is substantially inhibited or eliminated by electrowinning the metal from electrolyte containing certain cationic ... | 11/27/1984 |
| 4288302 | Method for electrowinning metal Novel dimensionally stable electrodes constituted by a film forming metallic material alloyed with at least one member of the group consisting of metal belonging to Groups VIB, VIIB, VIII, IIB, IB, IVA, lanthanum and lanthanide series of the Periodic Tabl... | 09/08/1981 |
| 4272339 | Process for electrowinning of metals An electrowinning process for the recovery of various metals including copper, zinc and nickel from an aqueous electrolyte in an electrolytic cell containing anodes and cathodes is disclosed wherein the anodes are formed from a lead alloy containing from ... | 06/09/1981 |
| 4226684 | Electrode coating method Electrodes ultilized in electrolytic processes are coated with materials improving the electrodes by the incremental hammering of the powdered material serving as the coating on to the base electrodes by means of known processes whereunder steel is coated... | 10/07/1980 |
| 4140596 | Process for the electrolytic refining of copper A process for the electrolytic refining of metals, especially copper, in which the copper is deposited from an electrolyte on the cathode of an electrolytic cell which comprises periodically reversing the current with a forward pulse time of 2 to 9 second... | 02/20/1979 |
| 4134806 | Metal anodes with reduced anodic surface and high current density and their use in electrowinning processes with low cathodic current density Describes an electrochemical process operated at relatively low cathodic current density and high anodic current density, particularly for electrowinning and electrorefining processes using dimensionally stable metal anodes with reduced anodic electrocata... | 01/16/1979 |
| 4124482 | Method and apparatus for casting anodes A method for casting an insoluble anode for use in the electrowinning of copper, the anode being formed by casting molten lead alloy preferably including calcium as an alloying agent in a suitable mold necessary flow of the molten alloy being minimized wi... | 11/07/1978 |
| 4072586 | Manganese dioxide electrodes Novel electrodes consisting essentially of a valve metal base or other electrically conductive material which is corrosion-resistant to the anodic conditions having on at least a portion of its outer surface an electrocatalytic coating of ଲ-manganes... | 02/07/1978 |
| 4064022 | Method of recovering metals from sludges A sludge containing a sparingly soluble metal compound such as nickel carbonate or the like is supplied to an anode compartment or an intermediate compartment of an electrolytic cell provided with an anode compartment and a cathode compartment or with an ... | 12/20/1977 |
| 4062744 | Extraction of copper from sulfide ores Copper is extracted from sulfide ores or concentrates by electrolysis in a cell having separate anode and cathode sections, and having an intermediate liquid copper-mercury alloy electrode between the anode and cathode sections.... | 12/13/1977 |
| 4051000 | Non-contaminating anode suitable for electrowinning applications A non-contaminating electrode is provided suitable as an insoluble anode for the electrowinning of metals from an electrolyte solution, said electrode comprising a metal substrate formed of a metal selected from the group consisting of titanium, zirconium... | 09/27/1977 |
| 4039403 | Electrowinning metals A method of electrowinning metals in which the anode comprises a foraminate container containing particulate material chosen from the group electrically conducting non-polarizing compound of a metal and a non-metallic element.... | 08/02/1977 |
| 3953306 | Metal recovery from waste treatment sludges An improved process for preparing highly concentrated salt solutions of metals of high purity from waste metal sludges at superior dissolution rates is achieved by preparing, concentrating and washing the sludge containing insoluble metal hydroxide under ... | 04/27/1976 |
