Class 75/714 - From electrolytic or cementation slime

Subclass of Class 75 - Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
Definition: Process that produces free metal from a starting material
No. of patents: 34
Last issue date: 09/29/2009

Number	Title	Issue Date
7594951	Process for engineered ion exchange recovery of copper and nickel A method for extracting and concentrating copper values from copper-I leach liquors that are economically non-viable using conventional SX-EW or known conventional configurations of IX. The novel process scheme is compatible and advantageous for use with a multi-por...	09/29/2009
7148054	Evolution of whole cells and organisms by recursive sequence recombination The invention provides methods employing iterative cycles of recombination and selection/screening for evolution of whole cells and organisms toward acquisition of desired properties Examples of such properties include enhanced recombinogenicity, genome copy number,...	12/12/2006
7138005	Nickel refining method The present invention provides a nickel refining method which uses nickel sulfide produced from nickel oxide ore using a hydrometallurgical process, as the raw material, and in which chlorine leaching is performed using a chloride solution, wherein a cementation rea...	11/21/2006
7018593	Base metal recovery from a tailings dump by bacterial oxidation A method of recovering base metal from a tailings dump which includes the steps of: aerating a surface layer of the dump; adjusting the pH and the moisture content of the surface layer to provide conditions favourable for bacterial oxidation of sulphide minerals; al...	03/28/2006
7012209	Method of gold separation and gold separation device A method of collecting gold by flowing water over a gold collecting medium located in a sluice to induce a positive surface charge on the gold collecting medium. Feeding gold laden material into the sluice with the flowing water to induce a negative surface charge o...	03/14/2006
6800111	Method for recovering catalytic metals A method for recovering catalytic metals from compositions containing catalytic metal colloids. Compositions such as rinse solutions or dragout baths containing catalytic metal colloids are passed through a filter that entraps catalytic metal colloids from the solut...	10/05/2004
6797033	Method for recovering catalytic metals A method for recovering catalytic metals from fluids containing catalytic metal colloids. Fluid compositions such as rinse solutions or dragout baths containing catalytic metal colloids are passed through a filter that entraps catalytic metal colloids on the filter....	09/28/2004
6773485	Method for recovering catalytic metals using a porous metal filter A method for recovering catalytic metals from fluid compositions containing catalytic metal colloids. Fluid compositions such as aqueous rinse solutions or dragout baths containing catalytic metal colloids are passed through a porous metal filter that entraps the ca...	08/10/2004
6129779	Reclaiming metallic material from an article comprising a non-metallic friable substrate A method for reclaiming a metallic material from a article including a non-metallic friable substrate. The method comprising crushing the article into a plurality of pieces. An acidic solution capable of dissolving the metallic material is provided dissol...	10/10/2000
6126720	Method for smelting noble metal A method for refining noble metals has a silver treating process including a nitric acid leaching step of silver, a purification step of the leaching solution, an electrolytic decomposition step of silver, and a recycling step after the electrolytic decom...	10/03/2000
6051049	Utilization of strontium aluminate in steelmaking Novel utilizations of strontium aluminate, a by-product of the manufacture of strontium, are disclosed in connection with the art of steelmaking. It is useful as a synthetic slag covering for molten iron or steel, as well as in the foaming slag practice, ...	04/18/2000
5632963	Process for the removal of impurity elements from solutions of valuable metals A process is disclosed for removing impurity elements, such as arsenic, and if necessary antimony, iron or bismuth, from valuable metal containing, such as copper containing, strongly mineral acid solutions by way of solvent extraction with organic soluti...	05/27/1997
5478664	Method of recovering reusable metals from nickel-hydrogen rechargeable battery A method of recovering a reusable metal from a nickel-hydrogen rechargeable battery characterized in that the method comprises crushing the nickel-hydrogen rechargeable battery to obtain a crushed material, separating alkali, organic substances and iron f...	12/26/1995
5462670	Process for removing oils and greases from aqueous solution A process for removing dissolved oils and greases from an aqueous solution which also may contain dissolved heavy metals is provided wherein the aqueous solution is mixed with a source of ferrous ion and dithionite ion in a first step at acidic pH to redu...	10/31/1995
5456992	Process for battery recycling Household sealed cell alkaline and zinc carbon batteries may be recycled for use in steel making as follows. The batteries are pulverized then run through an acidic bath to neutralize the alkaline electrolyte. Next the materials are rinsed, then dried and...	10/10/1995
5389262	Process for removing heavy metals from solutions with ferrous dithionite and hydroxide 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. Chelating agents that are present are deactivated by bonding ...	02/14/1995
5298168	Ferrous dithionite process and composition for removing dissolved heavy metals from water A process for removing dissolved heavy metal from an aqueous solution is provided where the aqueous solution is mixed with a source of ferrous ion and dithionite ion in a first step at acidic pH to reduce and permit removal of the heavy metal. Solution fr...	03/29/1994
5271909	Method of tellurium separation from copper electrorefining slime A method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to 150 psi and at an elevated temperature between about 100° a...	12/21/1993
5108721	Treatment of high nickel slimes A two-stage process for treating anode slimes and other residues containing a substantial amount of nickel without significant dissolution of silver and/or selenium in a single autoclave is disclosed. The process comprises, in a first stage, leaching the ...	04/28/1992
4881973	Life silver recovery system A process is described which improves the life of a silver recovery unit which employs finely divided iron and a minor amounts of a copper or cadmium salt therein by raising the pH of waste acidic photographic processing stream containing silver to be rec...	11/21/1989
4874429	Hydrometallurgical process for the recovery of silver from copper electrolysis anode sludge Silver is recovered from an anode sludge by initially chlorinating the sludge in a slurry with nascent chlorine. The nascent chlorine is produced in situ by addition of sodium hypochlorite to the slurry in hydrochloric acid. Then the slurry is filtered an...	10/17/1989
4842644	Silver recovery method Methods of and apparatus for recovering silver and other metals from solutions containing compounds of those metals. The solution being treated is pumped upwardly under pressure and at a constant rate through a reaction mass or medium to promote ion excha...	06/27/1989
4770700	Hydrometallurgical process for the separation and enrichment of gold, platinum, and palladium, together with recovery of selenium from the anode sludge of copper electrolysis A hydrometallurgical process for enrichment of gold, platinum and palladium from copper electrolysis anode sludge, and simultaneously recovery of selenium, in which the sludge is treated with Cl2 /HCl to transform the selenium of a hexavelent s...	09/13/1988
4722831	Process for purifying silver refinery slimes Gold sand resulting from the nitric acid treatment of silver refinery slimes is purified by washing with hydrochloric acid under controlled operating conditions. Platinum and other precious metals and impurities are selectively separated from the gold san...	02/02/1988
4687559	Treatment of residues for metal recovery This invention relates to a hydrometallurgical process for recovering the values contained in metallurgical residues, such as anode mud. In the first step of the process the residue is leached with an alkali carbonate bearing cyanide solution in the prese...	08/18/1987
4640710	Process for recovering silver from sulfate solutions The invention relates to a process for recovering silver in sulfuric solutions. Its characterizing feature is that the silver solution is contacted with a quantity of zinc sulfide which is at least equal to the stoichiometric quantity and the surface area...	02/03/1987
4293332	Hydrometallurgical process for recovering precious metals from anode slime A hydrometallurgical process for recovering precious metals, such as gold, silver, selenium, and tellurium etc. from anode slime has been developed and tested successfully. The process comprises three major unit operations: leaching, liquid-liquid extract...	10/06/1981
4283224	Separative treatment of anode slime A hydrometallurgical process is provided for the separative treatment of electrometallurgical anode slime containing precious metals and substantial amounts of tin dioxide and lead sulfate. The process is especially suited for treatment of anode slimes fr...	08/11/1981
4149879	Recovery of mercury and caustic values from caustic sludges Mercury and caustic values are recovered from caustic sludges in a process which comprises intermixing the caustic sludge with a liquid under pressure or agitation to produce a caustic slurry which is separated into a caustic liquor, metallic mercury and ...	04/17/1979
4124459	Process for removing mercury from brine sludges The mercury content of electrolysis cell brine sludge is reduced by sequentially: (1) acidifying the sludge to a pH below 2.5 and (2) leaching the sludge with aqueous hypochlorite solvent. The mercury content removed from the sludge may optionally be isol...	11/07/1978
4111688	Method for separating gold from acid aqueous solution A method for separating gold etc. from acid aqueous solution comprising a first step in which a silver amalgam with high silver content is added to acid aqueous solution containing gold to precipitate metallic gold, a second step in which silver amalgam w...	09/05/1978
4108744	Recovery of the zinc contained in the residual solutions obtained after electrolytic deposition Process for the recovery of the zinc contained in the residual solutions obtained after electrolytic deposition by fixing the zinc (none of the other metals present in the solution being included in said complex), in the form of a complex by adding of a a...	08/22/1978
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
4002544	Hydrometallurgical process for the recovery of valuable components from the anode slime produced in the electrolytical refining of copper A hydrometallurgical process for the recovery of silver, selenium and tellurium from the anode slime produced in the electrolytic refining of copper or lead or from other raw materials bearing these metals, wherein the raw material and concentrated sulfur...	01/11/1977

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Class 75/714 - From electrolytic or cementation slime