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Browse by Category: Main > Material Science
Class Information
Number: 75/721
Name: Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures > Processes > Producing or treating free metal > Below 300 degrees c > Using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.) > Utilizing organic reducing agent
Description: Process wherein an organic compound is used as a reducing agent for producing free metal.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8628600 Method for extracting hexavalent chromium in a polymer material Jan. 14, 2014
8609898 Separation reagent of platinum group metal, method for separating and recovering platinum group metal, and amide-containing tertiary amine compound Dec. 17, 2013
8500846 Rare metal extractant Aug. 6, 2013
8475560 Method for producing silver nanofilaments Jul. 2, 2013
8419822 Methods for producing carboxylic acid stabilized silver nanoparticles Apr. 16, 2013
8328900 Processes for recovering metals from aqueous solutions Dec. 11, 2012
8287771 Method for producing silver particle powder Oct. 16, 2012
8277538 Method of leaching copper sulfide ore Oct. 2, 2012
8167974 Terephthalic acid purge filtration rate by controlling % water in filter feed slurry May. 1, 2012
8070850 Process for liberating metals using direct production of leach grade acid solutions Dec. 6, 2011
8029598 Method for recovering metal values from refractory sulfide ore Oct. 4, 2011
7857888 Method for separation and recovery of noble metals Dec. 28, 2010
7842274 Process for manufacture of silver-based particles and electrical contact materials Nov. 30, 2010
7794677 Reduction of copper content in the molybdenite concentrate Sep. 14, 2010
7776442 Particulate powder of silver and method of manufacturing same Aug. 17, 2010
7763096 Recovery of rhenium Jul. 27, 2010
7641714 Method for recovering metal values from refractory sulfide ore Jan. 5, 2010
7628840 Metal nano-particles and method for preparing the same, dispersion of metal nano-particles and method for preparing the same, and thin metallic wire and metal film and method for preparing the Dec. 8, 2009
7582136 Recovery of gold from potassium iodide-iodine etching solution Sep. 1, 2009
7563304 Heap bioleaching process Jul. 21, 2009
7455716 High temperature heap bioleaching process Nov. 25, 2008
7429286 Method for recovering metal values from concentrates of sulfide minerals Sep. 30, 2008
7214256 Solvent extraction process May. 8, 2007
7214644 Cross-coupling reactions May. 8, 2007
7160354 High temperature heap bioleaching process Jan. 9, 2007
6977050 Synthesis of lignosulfonic acid-doped polyaniline using transition metal ion catalysts Dec. 20, 2005
6706795 Methods for the preparation of nanosized material particles Mar. 16, 2004
6599414 Solvent extraction processes for metal recovery Jul. 29, 2003
6596053 Processes for the recovery of copper from aqueous solutions containing nitrate ions Jul. 22, 2003
6582494 Recovery of nickel and copper from sulphide concentrates by bioleaching Jun. 24, 2003
6468327 Process for processing residual substances containing at least one nonferrous metal and/or compounds thereof Oct. 22, 2002
6462095 Polymer-stabilized metal colloid solutions, method for producing said solutions and use of the same as catalysts for fuel cell Oct. 8, 2002
6432167 Processes for the recovery of copper from aqueous solutions containing nitrate ions Aug. 13, 2002
6416590 Solder powder and method for preparing the same and solder paste Jul. 9, 2002
6383254 Treatment solution and treatment method for reducing copper oxides May. 7, 2002
6290749 Preparation of ultra-pure silver metal Sep. 18, 2001
6241807 System for recovery of metals from solutions thereof Jun. 5, 2001
6162278 Photobiomolecular deposition of metallic particles and films Dec. 19, 2000
6106589 Method for treating noble metal complex ions Aug. 22, 2000
5925166 Process for obtaining iron or iron-based powders by organic liquid phase precipitation Jul. 20, 1999
5769925 Process for the elution of precious metals absorbed on active carbon Jun. 23, 1998
5759410 Process for recovering mercapto-s-triazines from silver precipitate Jun. 2, 1998
5484470 Enhancement of gold lixiviation using nitrogen and sulfur heterocyclic aromatic compounds Jan. 16, 1996
5474593 Agent for treating metal ions in an aqueous solution, process for producing the metal ion-treating agent and method for treating metal ions in an aqueous solution Dec. 12, 1995
5458787 Extraction of certain metal cations from aqueous solutions Oct. 17, 1995
5411573 Recovery of precious metals from acid solutions by N-containing electroactive polymers May. 2, 1995
5389122 Process for making finely divided, dense packing, spherical shaped silver particles Feb. 14, 1995
5368632 Redox polymer films for metal recovery applications Nov. 29, 1994
5358546 Highly reactive forms of zinc and reagents thereof Oct. 25, 1994
5283192 Biological process for enhanced manganese and silver recovery from refractory manganiferous silver ore Feb. 1, 1994

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