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Class Information
Number: 75/726
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.) > Displacing by another metal (i.e., electromotive series) > Copper(cu) recovered as free metal
Description: Process wherein the free metal recovered by displacement is Copper (Cu).

Sub-classes under this class:

Class Number Class Name Patents
75/727 And flotation 3
75/728 And injecting or pressurizing with air or oxygen 18
75/729 From cyanide solution 4
75/731 Utilizing leaching agent containing sulfur(s) 21
75/730 With agitating or abrading 14

Patents under this class:
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Patent Number Title Of Patent Date Issued
8585991 Method for recovering indium, silver, gold and rare, precious and base metals from complex oxide and sulfide ores Nov. 19, 2013
8545690 Purification method of zinc sulfate leachate Oct. 1, 2013
8435442 System for decreasing amount of organic solution in the liquid-liquid extraction process May. 7, 2013
8323510 Ultrasound assisted heavy metal recovery Dec. 4, 2012
8262769 Method of detinning Sn plating layer on Cu-based material Sep. 11, 2012
7594951 Process for engineered ion exchange recovery of copper and nickel Sep. 29, 2009
6517789 Method for reclaiming constituents from an industrial waste stream Feb. 11, 2003
6423281 Method for reducing the formation of Zn(NH4)4Cl2 from ZnO/NH4Cl solutions Jul. 23, 2002
6395242 Production of zinc oxide from complex sulfide concentrates using chloride processing May. 28, 2002
6264903 Method for recycling industrial waste streams containing zinc compounds Jul. 24, 2001
6146909 Detecting trace levels of copper Nov. 14, 2000
5954854 Method for recovering etchant from etching waste liquid containing iron chloride Sep. 21, 1999
5906749 Method for recovering metals from solutions May. 25, 1999
5788740 Method for the hydrometallurgical separation and recovery of biological nutrients, lead, gypsum and cadmium from raw materials Aug. 4, 1998
5709730 Hydrometallurgical processing of flue dust Jan. 20, 1998
5679259 Method for recovering metals from solutions Oct. 21, 1997
5662861 Liquid extraction Sep. 2, 1997
5616168 Hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper Apr. 1, 1997
5571306 Method for producing an enriched iron feedstock from industrial furnace waste streams Nov. 5, 1996
5472618 Method for recovering metals from solutions Dec. 5, 1995
5403382 Method and apparatus for copper processing Apr. 4, 1995
5348722 Removal of detrimental metal ions from hydrofluoric acid solution for cleaning silicon surfaces Sep. 20, 1994
5316567 Hydrometallurgical copper extraction process May. 31, 1994
5240687 Brine treatment Aug. 31, 1993
5236491 Boron recovery from geothermal brines Aug. 17, 1993
5223024 Hydrometallurgical copper extraction process Jun. 29, 1993
5145515 Treatment of brine Sep. 8, 1992
5145656 Brine treatment Sep. 8, 1992
5133873 Process for removal of copper ions from aqueous effluent Jul. 28, 1992
5122279 Ferrous dithionite process and compositions for removing dissolved heavy metals from water Jun. 16, 1992
5110354 Closed loop copper cell extraction process May. 5, 1992
5104445 Process for recovering metals from refractory ores Apr. 14, 1992
5092563 Apparatus for recovery of heavy metals from highly concentrated wastewater solutions Mar. 3, 1992
5082492 Recovery of precious metals from aqueous media Jan. 21, 1992
5078786 Process for recovering metal values from jarosite solids Jan. 7, 1992
5032175 Process for removing impurities from flue dusts Jul. 16, 1991
5019273 Method for recovery of heavy metals from highly concentrated wastewater solutions May. 28, 1991
5017346 Process for treating zinc oxide bearing materials May. 21, 1991
4956097 Waste treatment of metal containing solutions Sep. 11, 1990
4950326 Process for removal of dissolved copper from solution Aug. 21, 1990
4889694 Recovery of zinc values from zinc and iron-bearing sulfide materials Dec. 26, 1989
4655829 Metal recovery process Apr. 7, 1987
4637832 Process for purifying solutions of zinc sulphate Jan. 20, 1987
4585477 Method for separating and recovering nickel and copper from complex materials Apr. 29, 1986
4545963 Process for separately recovering zinc and lead values from zinc and lead containing sulphidic ore Oct. 8, 1985
4500496 Process for purifying molybdenite concentrates Feb. 19, 1985
4488950 Heavy metal separation from copper-bearing wastes Dec. 18, 1984
4450002 Heavy metal removal process May. 22, 1984
4384890 Cupric chloride leaching of copper sulfides May. 24, 1983
4378275 Metal sulphide extraction Mar. 29, 1983

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