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Class Information
Number: 423/18
Name: Chemistry of inorganic compounds > Treating mixture to obtain metal containing compound > Radioactive metal (at. no. 84+ or radioactive isotope of another metal) > Actinide series metal (at. no. 89+) > Forming insoluble substance in liquid > Acid leaching
Description: Processes which include making a separation by using an acid as an active ingredient to leach, wash, or dissolve; see Glossary.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8574523 Advanced dry head-end reprocessing of light water reactor spent nuclear fuel Nov. 5, 2013
8494107 Method of suppressing deposition of radioactive isotope Jul. 23, 2013
7988937 Decontamination of radioactive metals Aug. 2, 2011
7794677 Reduction of copper content in the molybdenite concentrate Sep. 14, 2010
7780921 Ultrasonic counter-current screw extractor for uranium recovery Aug. 24, 2010
7655199 Process for uranium recovery using anion exchange resin Feb. 2, 2010
7195745 Method of preparing a product based on phosphate of thorium and/or actinide(s) Mar. 27, 2007
7011798 Process for reprocessing spent nuclear fuels by utilizing phenomenon of cocrystallization Mar. 14, 2006
6843970 Process for recovering metal values by dissolving them in a sulfuric acid solution containing a carbon source and a reducing agent Jan. 18, 2005
6169221 Decontamination of metal Jan. 2, 2001
6159435 Leaching of mineral ores Dec. 12, 2000
6033636 Method of recovering uranium and transuranic elements from spent nuclear fuel Mar. 7, 2000
5826162 leaching of titaniferous materials Oct. 20, 1998
5640701 Method for remediating soil containing radioactive contaminants Jun. 17, 1997
5437848 Recovery of metal values from process residues Aug. 1, 1995
5384105 Metal and fluorine values recovery from mineral ore treatment Jan. 24, 1995
5384104 Uranium carbonate extraction process Jan. 24, 1995
5344623 Process for the extraction of strontium from acidic solutions Sep. 6, 1994
5322644 Process for decontamination of radioactive materials Jun. 21, 1994
RE34613 Process for decontaminating radioactively contaminated metal or cement-containing materials May. 24, 1994
5229086 Removal of molybdenum from uranium-bearing solutions Jul. 20, 1993
5084253 Method of removing niobium from uranium-niobium alloy Jan. 28, 1992
5077020 Metal recovery process using waterglass Dec. 31, 1991
5023059 Recovery of metal values and hydrofluoric acid from tantalum and columbium waste sludge Jun. 11, 1991
5017345 Method of producing uranium (IV) fluoride May. 21, 1991
5008044 Process for decontaminating radioactively contaminated metal or cement-containing materials Apr. 16, 1991
4968504 Recovery of scandium and uranium Nov. 6, 1990
4933113 Process for the processing of contaminated boric acid Jun. 12, 1990
4839101 Process for improving the effectiveness of the removal of zirconium from a nuclear fuel and/or fertile material solution Jun. 13, 1989
4834793 Oxidation process for releasing metal values in which nitric acid is regenerated in situ May. 30, 1989
4828759 Process for decontaminating radioactivity contaminated metallic materials May. 9, 1989
4769180 Process for separately recovering uranium and hydrofluoric acid from waste liquor containing uranium and fluorine Sep. 6, 1988
4764353 Leaching of uranium ore Aug. 16, 1988
4756853 Process for the conversion into usable condition of actinide ions contained in the solid residue of a sulfate reprocessing process for organic, actinide-containing radioactive solid waste Jul. 12, 1988
4744960 Process for the separation of rare earths and uranium of a UF.sub.4 concentrate and for putting them into useful form May. 17, 1988
4689178 Method for magnesium sulfate recovery Aug. 25, 1987
4656011 Process of treating nuclear fuel Apr. 7, 1987
4649031 Process for recovering rare metals from the combustion residue of coal by digestion Mar. 10, 1987
4643882 Process for recovery by a solvent of the uranium present in phosphoric acid Feb. 17, 1987
4636369 Essentially complete recovery of uranium, yttrium, thorium and rare earth values from phosphate rock during wet-process production of phosphoric acid therefrom Jan. 13, 1987
4636367 Removal of radium from aqueous liquids Jan. 13, 1987
4626416 Insoluble chelating compositions Dec. 2, 1986
4609533 Process for selective separation of plutonium from uranium and other metals Sep. 2, 1986
4587108 Flocculation of acid leach slurries May. 6, 1986
4576802 Method of dissolving impure uranium tetrafluoride Mar. 18, 1986
4572581 In-situ recovery of mineral values Feb. 25, 1986
4514378 Process for recovering uranium from spent shale Apr. 30, 1985
4486392 Process for the selective separation of uranium from accompanying metals Dec. 4, 1984
4464345 Method of precipitating contaminants in a uranium leachate using ferri ions, complexing agent, and pH control Aug. 7, 1984
4452490 Treatment of subterranean uranium-bearing formations Jun. 5, 1984

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