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7601247 |
Falling bed cathode cell for metal electrowinning
A cell ( 100 ) for metal electrowinning from metal ion solutions is described, wherein the cathode ( 1 ) consists of a falling bed of growing beads; the beads, withdrawn from the lower part of the...
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7591934 |
Apparatus for producing metal powder by electrowinning
This invention relates to an apparatus for producing a metal powder product using either conventional electrowinning or alternative anode reaction chemistries in a flow-through electrowinning cell....
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7550068 |
Wireless electrolytic cell monitoring powered by ultra low bus voltage
A system, device, and method include a cell-powered first electronic device powered using electrical potential imposed across an electrolytic cell. The potential is voltage-boosted to accomplish...
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7494580 |
System and method for producing copper powder by electrowinning using the ferrous/ferric anode reaction
The present invention relates, generally, to a method for electrowinning copper powder, and more particularly to a method for electrowinning copper powder from a copper-containing solution using...
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7494579 |
Spouted bed electrode cell for metal electrowinning
It is herein described an electrowinning cell with a spouted bed electrode of growing metallic beads, separated by a semi-permeable diaphragm and suitable for being assembled in a stack in a...
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7485216 |
Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solvent/solution extraction
The present invention relates generally to a process for recovering copper and/or other metal values from a metal-bearing ore, concentrate, or other metal-bearing material using pressure leaching...
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7470356 |
Wireless monitoring of two or more electrolytic cells using one monitoring device
A system, device, and method include a cell-powered first electronic device for monitoring two or more electrolytic cells is powered using electrical potential imposed across the electrolytic...
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7470351 |
Discrete particle electrolyzer cathode and method of making same
A system for producing metal particles using a discrete particle electrolyzer cathode, a discrete particle electrolyzer cathode, and methods for manufacturing the cathode. The cathode has a...
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7462272 |
Process for multiple stage direct electrowinning of copper
A system and process for recovering copper from a copper-containing ore, concentrate, or other copper-bearing material to produce high quality cathode copper from a leach solution without the use...
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7452455 |
System and method for producing metal powder by electrowinning
This invention relates to a system and method for producing a metal powder product using either conventional electrowinning or alternative anode reaction chemistries in a flow-through...
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7445696 |
Monitoring electrolytic cell currents
For an electrolytic cell, an apparatus and method are described that use one or more sensors to measure magnetic field strength about a conductor carrying electrical current. A processor is in...
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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...
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7378010 |
System and method for producing copper powder by electrowinning in a flow-through electrowinning cell
This invention relates to a system and method for producing a metal powder product using conventional electrowinning chemistry (i.e., oxygen evolution at an anode) in a flow-through electrowinning...
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7335289 |
High purity electrolytic copper and its production method
A method of producing high purity electrolytic copper through halide-bath electrowinning is provided. The method includes the steps of: growing copper in dendritic form to be deposited on a...
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7153590 |
Composite copper foil and manufacturing method thereof
A composite copper foil ( 10 ) comprises a carrier foil ( 12 ) formed by electrodeposition onto a cathode, the carrier foil ( 12 ) having a cathode side formed in contact with the cathode and an...
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6896788 |
Method of producing a higher-purity metal
A method of producing a higher purity metal comprising the step of electrolyzing a coarse metal material by a primary electrolysis to obtain a primary electrodeposited metal, the step of...
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6835297 |
High current density electrolytic decomposition process for copper
The method for electrolytically refining copper makes use of crude copper as an anode and is characterized in that the temperature of the electrolyte in an electrolytic cell is maintained at a...
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6692628 |
Process to remove ferric iron impurities from an acidic aqueous solution used in the electro-winning of copper
A process for the removal of primarily iron impurities from acidic aqueous electrolytic solutions used in the electro-winning of copper is described. Strong base Type 1 ion exchange resin is used...
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6663758 |
Method and apparatus for producing electrolytic copper foil
An electrolytic copper foil is electrodeposited onto the cathodic drum surface of a rotating cathode drum by feeding an electrolytic solution between the cathode drum and an anode facing each other...
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6599414 |
Solvent extraction processes for metal recovery
An improvement in the solvent extraction process for recovering metal values, i.e. copper, from acidic aqueous solutions containing copper and iron which may also include chloride, and more...
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6547949 |
Method for preventing stray currents in peripheral system parts during an electrolysis process for obtaining metals
The electrolyte is supplied from a reservoir through at least one supply line to an electrolysis area including anodes and cathodes and at least one electric d.c. voltage source, and used...
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6537439 |
Method and apparatus for recovering a reaction product produced at a surface
A method and apparatus are described for removing a chemical product species produced by electrochemical action at an electrode or by a chemical reaction which occurs at the surface of a solid...
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6521117 |
Method for metal recovery from aqueous solutions
The present invention is directed to an improved process for the recovery of metal ions from metal-containing aqueous solutions using a supported liquid membrane (SLM) whereby the pH of the...
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6511591 |
Method for the electrolytic refining of copper
The present invention concerns a method for the prevention of anode passivation in the electrolytic refining of copper, when periodic reversal current technology is used in electrolysis. The method...
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6398939 |
Method and apparatus for controlling flow in an electrodeposition process
An electrowinning cell, having a tank with an opened upper end defined by a tank edge, electrolyte within the tank and a plurality of flat, metallic electrode plates disposed within the tank in...
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6372111 |
Method and apparatus for reclaiming a metal from a CMP process for use in an electroplating process
A method and apparatus is disclosed for reclaiming a metal from the effluent of a chemical mechanical planarization (CMP) process and using the reclaimed metal in an electroplating process. The...
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6332973 |
CMOS chemical bath purification
CMOS processing is enhanced via a method and system that use a chemical bath purification process. According to an example embodiment of the present invention, solution from a CMOS wet chemical...
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6322609 |
Low density high surface area copper powder and electrodeposition process for making same
This invention relates to a low density high surface area copper powder having an apparent density in the range of about 0.20 to about 0.60 gram per cubic centimeter, and a surface area of at least...
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6309969 |
Copper metallization structure and method of construction
The invention is directed to the use of copper as via and interconnect structures for an integrated circuit. The process in accordance with a preferred embodiment produces an interconnect layer of...
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6306282 |
Sludge-free treatment of copper CMP wastes
Waste slurry containing dissolved metal from e.g., CMP is subjected to sludge-free processing. Embodiments include separating the waste slurry with a solids filter into a solids-free dissolved...
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RE37251 |
Chloride assisted hydrometallurgical extraction of metal
A process for the extraction of a metal from an ore or concentrate comprises subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic solution containing...
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6187169 |
Generation of organosulfonic acid from its salts
A procedure for the generation of organosulfonic acids from solutions of corresponding metal organosulfonate compounds by electrowinning, electrolytically driven hydrolysis or chemically driven...
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6176997 |
Apparatus and method for copper extraction by in-situ electrolysis in heap-leaching of ores
Copper is extracted from a heap of low-grade ore by transforming the heap into an electrolytic cell, and imposing a voltage thereon. Anodic conditions of redox and pH cause the sulphide to break...
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6149797 |
Method of metal recovery using electrochemical cell
A high performance method for recovery of metal from aqueous solutions is carried out using an electrochemical cell having a cathode assembly that includes a nonporous support member, a primary...
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6045669 |
Structure of electric contact of electrolytic cell
The present invention provides a structure of an electric contact of an electrolytic cell, wherein an elongated conductive member is provided as a bus bar 10 on a wall of an electrolytic cell for...
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5997711 |
Control agent for reducing metal acid mist emissions from electrolytic cell operations
Disclosed is a method for reducing metal acid or salt evolved from electrolytic baths housed in electrolytic tanks during electrolytic operations. This method involves covering all of the surface...
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5876588 |
Process for removing and recovering copper, silver and zinc from sulfide ores
Ores containing copper, zinc, silver in the form of sulfides are treated by a solution of sulfurated sulfite ions and ammonium ions in order to remove most of the metals from the sulfide ores. This...
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5855756 |
Methods and apparatus for enhancing electrorefining intensity and efficiency
An electrorefining cell permits increased electrolyte flow rates while maintaining the slime layer at the bottom of the cell and on the anode faces substantially intact. The cell includes an inlet...
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5837123 |
Prevention of cathode corrosion during electrowinning
A method to prevent corrosion of a stainless steel cathode in a copper electrowinning system uses compounds added to the electrowinning solution which reduce the level of free chlorine. Examples of...
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5820653 |
Process for making shaped copper articles
This invention relates to a process for making a shaped copper article directly from a copper-bearing material, comprising: (A) contacting said copper-bearing material with an effective amount of...
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5783057 |
Method of purifying copper electrolytic solution
A method of purifying a copper electrolytic solution circulated in a copper electrorefining system, wherein a portion of the solution is withdrawn and recycled to the system after purification...
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5720867 |
Process for the electrochemical recovery of the metals copper, zinc, lead, nickel or cobalt
An electrolytic cell comprising bipolar electrodes is employed for electrochemical deposition of copper, zinc, lead, nickel or cobalt. An interior space is provided between the cathode side and the...
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5626739 |
Electrokinetic leaching
A method of treating a solid material containing a substance of economic importance so as to recover or extract the substance from the material involving the following: forming a conducting mixture...
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5534131 |
Process for heavy metals electrowinning
The conditions for electrowinning Zn, Ni, Co and Cd metals from baths based on chlorinated ammino complexes of Me(NH 3 ) n Cl m type are substantially improved by the addition of small levels of...
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5409582 |
Silver bath waste treatment apparatus and method
Apparatus and methods for removing silver and copper ions from purge streams from silver replacement processes by separately electrowinning silver and copper where silver removal is first effected...
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4874436 |
Method for producing high purity electrolytic copper
A method is provided for producing high purity electrolytic copper useful, for example, to make a copper wire for use in sound or image reproducing systems, such as audio, video and television...
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4834842 |
Method of measuring the effective inhibitor concentration during a deposition of metal from aqueous electrolytes and test apparatus therefor
The effectiveness of organic additives acting as inhibitors during the electrolytic deposition of metals from aqueous electrolytes, which contain organic additives for improving the deposition of...
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4645578 |
Procedure for copper chloride aqueous electrolysis
The process for extraction of copper metal from copper sulfide ore comprises leaching copper sulfide ore with ferrous chloride solution, to produce copper chloride, and electrolysis of the copper...
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4627899 |
Electrolytic cell and methods combining electrowinning and electrochemical reactions employing a membrane or diaphragm
An electrolytic cell is provided for a process which combines at compatible cell geometries and current densities, the electrowinning of a metallic element from an electrolyte with an anodic,...
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4608136 |
Oxidation of carbonaceous material and electrodeposition of a metal at the cathode of an electrolytic cell
A metal is electrodeposited in a continuous cyclic electrolytic/carbon oxidation process wherein ferrous ion is oxidized at the anode and a metal is deposited at the cathode of an electrolytic...
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