Class 75/740 - Copper(Cu) recovered as free metal

Subclass of Class 75 - Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
Definition: Process wherein the free metal recovered is Copper (Cu).
No. of patents: 34
Last issue date: 06/17/2008

Number	Title	Issue Date
7387767	Recovery of nickel, cobalt, iron, silica, zinc and copper from laterite ore by sulfuric acid leaching A process for recovering nickel and cobalt values from nickel- and cobalt-containing laterite ores as an enriched mixed nickel and cobalt sulphide intermediate and for producing nickel and cobalt metal from the nickel and cobalt sulphide intermediate. The laterite o...	06/17/2008
7294168	Method for purifying the solution in the hydrometallurgical processing of copper The invention relates to the removal of bivalent copper from copper chloride solution in connection with the hydrometallurgical production of copper. In the copper production process, a copper-bearing raw material is leached with a chloride-bearing solution. The cop...	11/13/2007
7214644	Cross-coupling reactions A method for producing a copper/palladium colloid catalyst useful for Suzuki couplings. ...	05/08/2007
7211230	Process for producing nanometer grade powders The present invention discloses a process for producing nanometer powders, comprising the following steps: (a) providing reactant solution A and reactant solution B that can rapidly react to form precipitate; (b) continuously adding said solution A and solution B in...	05/01/2007
7156894	Method for recovering metal values from concentrates of sulfide minerals A method of recovering precious metal values from refractory sulfide ores is provided. The method includes the steps of separating clays and fines from a crushed refractory sulfide ore, forming a heap from the refractory sulfide ore, producing a concentrate of refra...	01/02/2007
6929677	Method for leaching copper concentrate This invention relates to a method where sulfidic iron-bearing copper concentrate is leached on the countercurrent principle, in a chloride environment. The leaching takes place with the aid of bivalent copper and an oxygen-bearing gas as a multi-stage continuous pr...	08/16/2005
6893482	Method for improving metals recovery using high temperature pressure leaching The present invention is directed to a system for recovering metal values from metal-bearing materials. During a reactive process, a seeding agent is introduced to provide a nucleation site for the crystallization and/or growth of solid species which otherwise tend ...	05/17/2005
6626979	Method for improving metals recovery using high temperature pressure leaching The present invention is directed to a process for recovering metal values from metal-bearing materials. During a reactive process, a seeding agent is introduced to provide a nucleation site for the crystallization and/or growth of solid species which oth...	09/30/2003
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 particularly to an improvement which provides for increased coppe...	07/29/2003
6596053	Processes for the recovery of copper from aqueous solutions containing nitrate ions A process for the recovery of copper from an aqueous phase containing nitrate ions, in which the aqueous phase is contacted with a solution of an oxime extractant in a water-immiscible organic solvent, which comprises using at least one of the following p...	07/22/2003
6468327	Process for processing residual substances containing at least one nonferrous metal and/or compounds thereof The invention relates to a method for processing residues containing at least one non-ferrous metal, preferably chosen from the group comprising zinc, lead, nickel, copper and cadmium and/or compounds thereof. According to this method, the non-ferrous met...	10/22/2002
6451088	Method for improving metals recovery using high temperature leaching The present invention is directed to a process for recovering metal values from metal-bearing materials. During a reactive process, a seeding agent is introduced to provide a nucleation site for the crystallization and/or growth of solid species which oth...	09/17/2002
6432167	Processes for the recovery of copper from aqueous solutions containing nitrate ions A process for the recovery of copper from an aqueous phase containing nitrate ions, in which the aqueous phase is contacted with a solution of an oxime extractant in a water-immiscible organic solvent, which comprises using at least one of the following p...	08/13/2002
6117209	Hydrometallurgical process for treating alloys and drosses to recover the metal components A hydrometallurgical method involves treating a dross source containing typically both antimony and tin and treating the dross to a series of chemical operations to yield a soft lead precursor, suitable for making soft lead for lead-based alloys for batte...	09/12/2000
6007600	Method for producing copper in hydrometallurgical process The invention relates to a method for producing copper in a hydrometallurgical process from copper-bearing raw materials, such as sulfidic concentrates. The concentrate is leached in a leaching stage of several steps into a chloride-based solution. The co...	12/28/1999
5917116	Method for the processing of copper minerals A method of processing a copper mineral, the method comprising activating the copper mineral by milling the copper mineral to P80 of between 2 and 20 micron, and subsequently subjecting the activated copper mineral to an oxidative hydrometallurgical treat...	06/29/1999
5709731	Slurry pipeline leaching method A method for concurrently transporting and leaching metal values from an ore or concentrate containing said metal values from an originating site such as an elevated site to a delivery site comprising the steps of crushing and/or grinding the ore or conce...	01/20/1998
5431713	Method for the reclamation of metallic compounds from zinc and lead containing dust A method for the reclamation of zinc, lead, tin, cadmium and copper from dust containing such elements or compounds which involves leaching the dust with sulfuric acid or ammonium bisulfate, neutralization the leachate with zinc oxide or zinc hydroxide, a...	07/11/1995
5366599	Method of selective recovery of ferrous and nonferrous metals from industrial wastes and scrap home electric appliances After optional preliminary treatment, solid wastes are processed in accordance with the flowsheet FIG. 1: first, Cu is leached selectively with a leaching solution containing Cu(II) ammine as a leachant according to the autooxidation or the autocatalytic ...	11/22/1994
5356457	Hydrometallurgical process for the treatment of copper-bearing ore A hydrometallurgical process for recovering copper from copper bearing ores or fractions, by a process of first wetting and sulfatizing the ore with controlled amounts of H2 SO4 and water, followed by acid curing and repulping to sul...	10/18/1994
5316567	Hydrometallurgical copper extraction process A process for the extraction of copper from a sulphide copper ore or concentrate comprises the steps of subjecting the ore or concentrate to agitation leaching at an elevated temperature and pressure to obtain a resulting acidic leach liquor containing di...	05/31/1994
5223024	Hydrometallurgical copper extraction process A process for the extraction of copper from a copper ore or concentrate comprises first subjecting the ore or concentrate to agitation leaching at an elevated temperature and pressure in the presence of oxygen and water to obtain a resulting acidic leach ...	06/29/1993
5122279	Ferrous dithionite process and compositions for removing dissolved heavy metals from water Heavy metal ions react with ferrous dithionite in acidic aqueous solution. They are reduced to metallic particles that are suitable for recycling and reuse when recovered from the acidic water. When chelating agents are present, they are deactivated by bo...	06/16/1992
5006262	Process for recovering copper from copper ion containing aqueous solutions A process for recovering copper from cupric ion containing aqueous solutions which comprises adding to the aqueous solution containing cupric ions an amount of reducing agent which corresponds from 0.1 to 10 moles of reducing agent per mole cupric ion, an...	04/09/1991
4956097	Waste treatment of metal containing solutions A method for waste treating metal containing solutions comprising decomposing the metal from the solution in the substantial absence of air and separating the decomposed (precipitated) metal from the solution....	09/11/1990
4684450	Production of zinc from ores and concentrates Recovering zinc from zinc bearing ore or concentrate (1) in an electrolic cell (3) which includes a cathode (5) containing cathode compartment (16) and an anode (4) containing anode compartment (2). The cathode and anode compartments are defined by interp...	08/04/1987
4676828	Process for the leaching of sulphides containing zinc and iron The extraction of zinc and copper and the recovery of precious metals from sulphurous zinciferous materials, also containing iron, becomes possible when these are treated by leaching under pressure in two stages, by judiciously controlling the relative qu...	06/30/1987
4606764	Method of recovering metals from ores using a formate reducing agent The invention comprises the treatment of metal oxides and mixed metal oxides and metal sulfides in a vertical tube reactor system having a downcomer section and a riser section in order to oxidize and dissolve the metal values in aqueous slurry primarily ...	08/19/1986
4582613	Use of copper (II) oxide as source of oxygen for oxidation reactions This invention comprises a wet oxidation process utilizing copper (II) oxide as the sole oxygen source. In particular the destruction and detoxification by oxidation of toxic materials such as cyanide, hydrocarbons, halogenated hydrocarbons, and dioxins c...	04/15/1986
4420401	Solution waste treatment A process is provided for the waste treatment of metal plating solutions. One embodiment of the process comprises removal of the metal values contained in solution and inactivation or destruction of the complexing agent's ability to complex heavy metals. ...	12/13/1983
4197117	Recovery of copper by ferrous ion precipitation Copper is recovered from dilute, ammoniacal, copper containing solutions by adding ferrous ions to the solution to precipitate metallic copper and iron oxides. The mixed precipitate is separated from the aqueous raffinate. The precipitated copper and iron...	04/08/1980
4065300	Method for extraction of copper products from copper bearing material Cuprous oxide and finely divided metallic copper are recovered from copper bearing material by an improved chemical process involving the dissolving of the copper bearing material in a solution of ammonium nitrate having an excess of NO3.d...	12/27/1977
3951649	Process for the recovery of copper Metallic copper is recovered from raw materials containing copper in a chemically bound state by first leaching the copper-containing raw material with a ferric chloride solution to extract copper as copper chloride in aqueous solution. The copper is extr...	04/20/1976
3933475	Extraction of copper from copper sulfides Copper is recovered from its sulfidic ores by a process wherein the ore is mixed and fused with at least a stoichiometric amount of a sulfide of sodium or potassium which may be prepared in situ by reacting sulfur with potassium or sodium hydroxide. The m...	01/20/1976

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Class 75/740 - Copper(Cu) recovered as free metal