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7465386 |
Electrolytic method in diaphragm-type cell
In a metal-winning method, copper ore or copper-ore concentrates is effectively hydraulically leached in a chloride leach liquor and the resultant leached liquor is diaphragm-electrolyzed. A...
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6641712 |
Process for the recovery of tin, tin alloys or lead alloys from printed circuit boards
A method for selective dissolution of tin and/or lead- or tin-containing alloys from printed circuit boards is provided comprising contacting a printed circuit board with a solution comprising...
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6532297 |
Gambling chip recognition system
A computer implemented gambling chip recognition system having the ability to capture an image of a stack of gambling chips and automatically processing the image to determine the number of chips...
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6514311 |
Clean process of recovering metals from waste lithium ion batteries
A process of recovering metals from waste lithium ion batteries, wherein the waste batteries are calcined and sieved to generate an ash containing metals and metal oxides. The invented process...
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6375713 |
Use of cupric chloride etchant solution in a solvent extraction electrowinning copper refinery
Process for improving recovery of copper and reducing raw material costs, from a copper-containing source by SX-EW. The process comprises the steps of mixing an acidic copper-containing PLS...
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6179988 |
Process for making copper wire
This invention relates to a process for making wire, comprising: (A) forming a circular disk of electrodeposited copper, (B) rotating said disk about its center axis; (C) feeding a cutting tool...
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6159356 |
Process for the production of high purity copper metal from primary or secondary sulphides
This process treats copper concentrates, either in the form of a primary sulfide, such as chalcopyrite, or a secondary sulfide, such as chalcocite and covellite, to obtain high purity copper metal...
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6156186 |
Method for removing contaminants from process streams in metal recovery processes
The present invention is directed to a process for removing various contaminants (e.g., organic collectors, contaminant metals or spectator ions, and/or suspended and colloidal solids) from process...
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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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5705048 |
Apparatus and a process for regenerating a CUCl.sub.2 etchant
The present invention relates to an apparatus and a process for regenerating a used etchant solution, which solution contains a metal in divalent form. The apparatus includes a tank which is...
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5670033 |
Process for making copper metal powder, copper oxides and copper foil
This invention is directed to a process for making copper metal powder from copper-bearing material, comprising: (A) contacting said copper-bearing material with an effective mount of at least one...
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5645708 |
Chloride assisted hydrometallurgical copper extraction
A process for the extraction of copper from a sulphide copper ore or concentrate comprises subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic chloride...
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5622615 |
Process for electrowinning of copper matte
A sulfur dioxide free process for the production of high purity metallic copper from copper-matte wherein copper-matte is leached under oxidizing conditions in a ferric-containing acid copper...
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5487819 |
Production of metals from minerals
A process for producing one or more metals from a mineral feedstock (12) is defined. The mineral is fed to a leaching apparatus (10) wherein it is contacted with electrolyte (14). The leaching...
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5372684 |
Process for the direct electrochemical refining of copper scrap
Copper scrap, reduced to particulate form having particle sizes not larger than 50 mm, is leached in a suitable apparatus with a solution of ferric fluoroborate in fluoroboric acid. During...
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5364444 |
Metal leaching and recovery process
A process for extracting metals from a flotation concentrate containing gold, platinum group minerals, copper, nickel and sulfur. The process involves roasting the concentrate in the presence of...
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5282938 |
Process for recovery of trace metals and salts from waste combustion residues
A method for the continuous treatment of air pollution control residues from various resource recovery systems whereby the air pollution control residue is treated with a dilute salt extracting...
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5262019 |
Decontamination of radioactive metals
Technetium-contaminated nickel is decontaminated by electrolytically dissolving nickel having a gross beta activity of at least about 74 Bq in a sulfuric acid solution having a pH between about 0.5...
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4828661 |
Process for recovery of metals from metal/plastic waste
The invention relates to a process for recovery of metals from metal/plastic waste using used etching and washing solutions from the electronics industry, with the following process steps: (a)...
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4671945 |
Method for separation and leaching of the valuable metals in sulphide materials
This is a method for the complete leaching of the valuable metals in a metal sulphide material which contains copper, zinc, lead, silver and iron by the use of a solution which essentially contains...
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4652352 |
Process and apparatus for recovering metals from dilute solutions
A process and apparatus are provided for recovering metals from dilute solution utilizing ion exchange and, optionally, electrolytic recovery. Ammonium salt regeneration solutions for use in the...
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4634467 |
Hydrometallurgical process for copper recovery
An improved hydrometallurgical process for the recovery of metallic copper, elemental sulfur, compounds of molybdenum and other valuable materials from copper sulfide ore concentrates, such as...
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4578162 |
Method for dissolving copper in the presence of iron
The invention is a method for dissolving copper in the presence of iron comprising: (a) contacting the copper with an oxidant solution; (b) dissolving at least a portion of the copper into...
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4544460 |
Removal of potassium chloride as a complex salt in the hydrometallurgical production of copper
Cuprous chloride, which is contained in a reduced leach solution or pregnant liquor, can be recovered as a complex salt of alkali metal chloride, such as potassium chloride, or alkaline earth metal...
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4338168 |
Hydrometallurgical treatment of copper-bearing hematite residue
A method is provided for recovering copper values from a copper-bearing hematite residue in a single stage. It comprises leaching the residue in an aqueous sulphuric acid solution in the presence...
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4337128 |
Cupric and ferric chloride leach of metal sulphide-containing material
A method of leaching of metal sulphide-containing material is disclosed. The metal sulphides can be iron, copper, lead, silver, mercury and/or zinc. The leaching is effected by means of...
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4244735 |
Chloride leach process for recovering metal values in the presence of arsenic
An improvement in the hydrometallurgical recovery of metals, such as, lead, silver, gold, antimony, and bismuth from materials such as flue dust in the presence of arsenic, comprising precipitating...
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4159232 |
Electro-hydrometallurgical process for the extraction of base metals and iron
A HYDROMETALLURGICAL PROCESS FOR THE ELECTROLYTIC RECOVERY OF SELECTED BASE METALS (ESPECIALLY COPPER OR POSSIBLY NICKEL) FROM SULPHIDE ORE CONCENTRATES CONCURRENTLY WITH THE EXTRACTION OF METALLIC...
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4039406 |
Recovering copper from concentrates with insoluble sulfate forming leach
This invention provides a novel and an improved hydrometallurgical method for recovering copper values from copper concentrates. The method essentially comprises the following steps: A. forming an...
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4016055 |
Method of extracting constituent metal values from polymetallic nodules from the sea
A method of extracting constituent metal values from sea nodules containing copper, cobalt, iron and nickel is disclosed. The method involves melting the nodules under reducing conditions to obtain...
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3994789 |
Galvanic cementation process
In the disclosed process, the winning of noble or relatively electronegative metals (e.g. Au, Ag, Cu, Ni, etc.) from substantially aqueous solutions containing ions of the metal through the use of...
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3979265 |
Recovery of metals from sulfur bearing ores
Sulfur monochloride is reacted with an ore containing iron, sulfur and a metal which forms a water soluble ammine complex or an ammonium-containing double salt, to yield metal chlorides and sulfur....
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3957602 |
Recovery of copper from chalcopyrite utilizing copper sulfate leach
Copper is recovered from chalcopyrite by means of a pollution-free hydrometallurgical process which entails leaching and converting the chalcopyrite with copper sulfate in order to produce an...
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3926752 |
Direct recovery of metals from sulphide ores by leaching and electrolysis
Finely ground copper sulfide ore or concentrate contained in a slurry with ferric chloride and hydrochloric acid is agitated in the anode compartment of an electrolytic cell in which the anode and...
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3923616 |
Recovery of metal values from ores
Metal values, e.g. copper, are extracted from sulfide ores, e.g. chalcopyrite, by leaching the ore in one or more stages with an aqueous solution containing iron ions and sufficient chloride ions...
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3901776 |
Process for the recovery of copper from its sulfide ores
An improvement in the process for recovering copper from its sulfide ores or concentrates thereof which comprises treating the ore with cupric chloride and/or ferric chloride to form a copper...
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3901775 |
Method of ocean floor nodule treatment and electrolytic recovery of metals
Method of recovering metal values from ocean floor nodules of the type containing iron, manganese, copper, cobalt, and nickel, comprising grinding the nodules into particles and mixing with a...
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3880732 |
Hydrometallurgical process for the production of copper
An improved process is described for the recovery of metallic copper from sulfur treated copper iron sulfide ore concentrates. X-bornite may be prepared from the chalcopyrite content of such ore...
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3879272 |
HYDROMETALLURGICAL PROCESS FOR THE PRODUCTION OF COPPER
A hydrometallurgical process for the recovery of metallic copper from chalcopyrite and other copper-containing materials by ferric chloride oxidation thereof to produce cupric chloride, reduction...
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3857767 |
RECOVERY OF COPPER FROM CHALCOPYRITE ORE CONCENTRATES
Copper is recovered from chalcopyrite ore concentrates by means of a process comprising (1) partial roasting of the concentrate under conditions producing a calcine consisting essentially of...
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3773635 |
PROCESSING OF MANGANESE NODULES FROM THE OCEAN FLOOR FOR METAL VALUES
Method for recovering metal values from ocean floor nodules of the type containing iron, manganese, copper, cobalt, and nickel comprising grinding the nodules into particles, chlorinating to obtain...
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3767543 |
PROCESS FOR THE ELECTROLYTIC RECOVERY OF COPPER FROM ITS SULFIDE ORES
An improvement in the ferric chloride leach recovery of copper from its sulfide ores which comprises recovery of the copper from the leach solution after removal of sulfur by electrolysis rather...
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3537961 |
PROCESS OF TREATING COPPER ORES
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3477928 |
PROCESS FOR THE RECOVERY OF METALS
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3288597 |
Process for the recovery of certain metallic and non-metallic constituents of waste slag from reverberatory refining of copper pyritic type ores
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3785944 |
Title is not available
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3776826 |
Title is not available
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3752745 |
Title is not available
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