Ion Exchanging Or Liquid-liquid Extracting Patents (Class 423/54)
  • Patent number: 9157165
    Abstract: A method of production of a chemically treated steel sheet using cathode electrolysis to form a chemically treated coating which stably resupplies Zr ions in a treatment solution and uses an insoluble anode to continuously and stably treat a steel strip by cathode electrolysis in a treatment solution containing Zr ions and fluorine ions, characterized by using two or more types of zirconium compounds selected from predetermined Zr compounds to resupply zirconium ions in a plating solution consumed by the cathode electrolysis during the cathode electrolysis and maintaining a content of ions in the plating solution at zirconium ions: 0.05 to 30 g/liter, fluorine ions: 0.5 to 10 times the content of the zirconium ions, and ions derived from said two or more types of zirconium compounds other than zirconium ions and fluorine ions: not more than 10 times the content of the zirconium ions in performing the cathode electrolysis.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: October 13, 2015
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Shigeru Hirano, Akira Tachiki
  • Patent number: 9139889
    Abstract: The present invention relates to an apparatus for atomizing molten slag and recovering valuable metals, and more particularly to an apparatus for atomizing molten slag and recovering valuable metals, which enables molten slag of a blast furnace or a converter or an electric furnace to be atomized and valuable metals to be recovered.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: September 22, 2015
    Assignees: Hyundai Steel Company, Korea University Research and Business Foundation
    Inventors: Joon-Seong Ki, Joon-Ho Lee, Jin-Ill Hwang
  • Publication number: 20150104362
    Abstract: A method of recovering molybdenum includes introducing resin comprising molybdenum anions into an elution vessel and eluting (separating) the molybdenum anions from the resin to form a molybdenum rich eluent. Small amounts of uranium within the eluent is precipitated into sodium diuranate and removed. A further precipitation process is performed to form ferrimolybdate from the molybdenum rich eluent, thus recovering molybdenum. The resin comprising the molybdenum anions may be generated by (1) moving a pregnant lixiviant (containing uranium and molybdenum) through a first extraction apparatus to capture uranium anions in resin and producing a barren lixiviant (containing mostly molybdenum, with small amount of uranium), and (2) moving the barren lixiviant through a second extraction apparatus to capture mostly molybdenum anions in resin.
    Type: Application
    Filed: October 2, 2014
    Publication date: April 16, 2015
    Inventor: Pablo Avila
  • Patent number: 8974674
    Abstract: A method for producing an ammonium tungstate aqueous solution includes the steps of: adding sulfuric acid to a solution containing tungstate ions; bringing the solution having the sulfuric acid added therein, into contact with an anion exchange resin; and bringing the anion exchange resin into contact with an aqueous solution containing ammonium ions.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: March 10, 2015
    Assignees: National University Corporation Nagoya University, A.L.M.T. Corp., Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Hideaki Ito, Takeshi Itakura, Yoshiharu Yamamoto, Kazuo Sasaya, Takuya Okuno, Fumiatsu Sato, Syunsuke Yamanaka, Akihiko Ikegaya
  • Patent number: 8968698
    Abstract: Provided herein are processes for recovering molybdenum and/or other value metals (e.g., uranium) present in aqueous solutions from a large range of concentrations: from ppm to grams per liter via a solvent extraction process by extracting the molybdenum and/or other value metal from the aqueous solution by contacting it with an organic phase solution containing a phosphinic acid, stripping the molybdenum and/or other value metal from the organic phase solution by contacting it with an aqueous phase strip solution containing an inorganic compound and having a ?1.0 M concentration of free ammonia, and recovering the molybdenum and/or other value metal by separating it from the aqueous phase strip solution. When the molybdenum and/or other value metal are present only in low concentration, the processes can include an organic phase recycle step and/or an aqueous phase strip recycle step in order to concentrate the metal prior to recover.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: March 3, 2015
    Assignee: Cytec Technology Corp.
    Inventors: Troy Allan Bednarski, Violina Antoneta Cocalia, Matthew Dean Soderstrom, Eduardo Alberto Kamenetzky, Andrew Michael Cameron, Douglas Harris
  • Patent number: 8945490
    Abstract: Provided are methods method of recovering metal from an aqueous solution, the method comprising contacting an aqueous solution containing at least two metals selected from molybdenum, cobalt, nickel, zinc and iron with an organic solvent and an oxime-containing reagent composition at a predetermined pH, the predetermined pH selected to provide a high first metal extraction and a low second metal extraction; and separating the first metal from the solution.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: February 3, 2015
    Assignee: BASF SE
    Inventors: Michael Virnig, Jack Bender, Nathan C. Emmerich
  • Patent number: 8920773
    Abstract: Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, leaching the roasted metal hearing material in a basic medium to yield a pregnant leach solution, conditioning the pregnant leach solution to thrill a preprocessed metal bearing material; and leaching the preprocessed metal bearing material in acid medium.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: December 30, 2014
    Assignee: Freeport Minerals Corporation
    Inventors: Joanna M. Robertson, Thomas R. Bolles, Wayne W. Hazen, Lawrence D. May, Jay C. Smith, David R. Baughman
  • Publication number: 20140301918
    Abstract: A method for recovering technical-grade molybdenum from diluted acid leaching solutions (PLS) that have a high arsenic concentration is disclosed.
    Type: Application
    Filed: August 24, 2012
    Publication date: October 9, 2014
    Applicant: ECOMETALES LIMITED
    Inventors: Felipe Andres Lagno Sanchez, Ricardo Fernando Sepúl Veda Letelier, Marcelo Gustavo Acuña Goycolea
  • Publication number: 20140286839
    Abstract: The present invention relates to a process for selectively removing molybdenum from a solution which contains molybdenum, said process comprising the following steps: bringing the solution to an acid pH lower than or equal to 3, preferably lower than or equal to 2, even more preferably lower than or equal to 0.
    Type: Application
    Filed: November 25, 2011
    Publication date: September 25, 2014
    Applicant: Eni S.P.A.
    Inventors: Andrea Bartolini, Emilio Sentimenti
  • Patent number: 8828353
    Abstract: The present invention relates generally to a process for controlled leaching and sequential recovery of two or more metals from metal-bearing materials. In one exemplary embodiment, recovery of metals from a leached metal-bearing material is controlled and improved by providing a high grade pregnant leach solution (“HGPLS”) and a low grade pregnant leach solution (“LGPLS”) to a single solution extraction plant comprising at least two solution extractor units, at least two stripping units, and, optionally, at least one wash stage.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: September 9, 2014
    Assignee: Freeport Minerals Corporation
    Inventors: Barbara J. Savage, David G. Meadows, Wayne W. Hazen
  • Patent number: 8753591
    Abstract: Molybdic oxide is recovered from molybdenite by a multistep process in which (A) the molybdenite is converted to soluble and insoluble molybdic oxide by pressure oxidation, (B) the insoluble molybdic oxide is converted to soluble molybdic oxide by alkaline digestion and then combined with the soluble molybdic oxide, and (C) the molybdenum values of the combined streams are extracted into an organic phase using a nonprimary amine. The extracted molybdenum values are recovered from the organic phase using aqueous ammonia to form ammonium dimolybdate (ADM) which is recovered as refined crystals from a two-step calcination process.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: June 17, 2014
    Assignee: Kennecott Utah Copper LLC
    Inventors: Mike Rockandel, Claus Stoiber, Robert E. Crossman
  • Patent number: 8753590
    Abstract: A solid composition comprises: MnO2; and a compound represented by the general formula (I) wherein: R is a polymer; each Y is independently a hydrogen or a negative charge; Z is either hydrogen or is not present; each n is independently 1, 2, 3, 4, 5 or 6; wherein the MnO2 is bound to the compound of formula (I) so as to coat the surface thereof. Such a composition may be used for the separation of polyvalent metal species, such as Mo, from one or more accompanying impurities.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: June 17, 2014
    Assignee: Mallinckrodt LLC
    Inventor: Luis Antonio Miguel Marques Barbosa
  • Patent number: 8636966
    Abstract: Compositions are provided that include nuclear fuel. Methods for treating nuclear fuel are provided which can include exposing the fuel to a carbonate-peroxide solution. Methods can also include exposing the fuel to an ammonium solution. Methods for acquiring molybdenum from a uranium comprising material are provided.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: January 28, 2014
    Assignee: Battelle Memorial Institute
    Inventors: Chuck Z. Soderquist, Amanda M. Johnsen, Bruce K. McNamara, Brady D. Hanson, Steven C. Smith, Shane M. Peper
  • Patent number: 8545673
    Abstract: Process for recovering molybdate or tungstate from an aqueous solution, in which molybdate or tungstate is bound to a water-insoluble, cationized inorganic carrier material from the aqueous solution at a pH in the range from 2 to 6, the laden carrier material is separated off and the bound molybdate or tungstate is liberated once again into aqueous solution at a pH in the range from 6 to 14. The process is suitable for recovering molybdate or tungstate in the delignification of pulp with hydrogen peroxide in the presence of molybdate or tungstate as catalyst. The recovered molybdate or tungstate can be recycled to the delignification.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: October 1, 2013
    Assignee: Evonik Degussa GmbH
    Inventors: Thomas Dietz, Hans Ulrich Süss
  • Publication number: 20130251609
    Abstract: Molybdic oxide is recovered from molybdenite by a multistep process in which (A) the molybdenite is converted to soluble and insoluble molybdic oxide by pressure oxidation, (B) the insoluble molybdic oxide is converted to soluble molybdic oxide by alkaline digestion and then combined with the soluble molybdic oxide, and (C) the molybdenum values of the combined streams are extracted into an organic phase using a nonprimary amine. The extracted molybdenum values are recovered from the organic phase using aqueous ammonia to form ammonium dimolybdate (ADM) which is recovered as refined crystals from a two-step calcination process.
    Type: Application
    Filed: February 28, 2013
    Publication date: September 26, 2013
    Applicant: KENNECOTT UTAH COPPER LLC
    Inventors: Mike Rockandel, Claus Stoiber, Robert E. Crossman
  • Patent number: 8529850
    Abstract: Provided are methods using a ketoxime in metal extraction. One aspect of the invention relates to a method for the recovery of metal from a metal-containing aqueous solution at an elevated temperature using a ketoxime. Another aspect relates to a method of separating iron/copper using a specific ketoxime. Aldoximes may also be added to the reagent compositions used in these methods.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: September 10, 2013
    Assignee: Cognis IP Management GmbH
    Inventors: Michael Virnig, Jack Bender, Nathan C. Emmerich
  • Patent number: 8506911
    Abstract: Compositions are provided that include nuclear fuel. Methods for treating nuclear fuel are provided which can include exposing the fuel to a carbonate-peroxide solution. Methods can also include exposing the fuel to an ammonium solution. Methods for acquiring molybdenum from a uranium comprising material are provided.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: August 13, 2013
    Assignee: Battelle Memorial Institute
    Inventors: Chuck Z. Soderquist, Amanda M. Johnsen, Bruce K. McNamara, Brady D. Hanson, Steven C. Smith, Shane M. Peper
  • Publication number: 20130195737
    Abstract: A method for extracting tungsten from scheelite by: 1) adding a mixed acid including H2SO4 and H3PO4 to a decomposition reactor; 2) heating the mixed acid to a temperature of 70-100° C.; adding scheelite while controlling the liquid-solid ratio at about 3:1-8:1 L/kg; allowing the components in the decomposition reactor to react for 1-6 h, and filtering to obtain a filtrate; 3) supplementing the filtrate with sulfuric acid consumed in the reaction; 4) crystallizing the filtrate to obtain phosphotungstic acid crystals and mother liquor; 5) dissolving the phosphotungstic acid crystals in water to obtain phosphotungstic acid solution; 6) transforming the phosphotungstic acid solution into an ammonium tungstate solution for the purpose of preparing ammonium paratungstate; and 7) supplementing the mother liquor with phosphoric acid and water to an initial level and reusing the mother liquor for ore leaching.
    Type: Application
    Filed: March 12, 2013
    Publication date: August 1, 2013
    Applicant: CENTRAL SOUTH UNIVERSITY
    Inventor: CENTRAL SOUTH UNIVERSITY
  • Patent number: 8475748
    Abstract: Reagent compositions, methods for their manufacture and methods of their use are described. In particular, provided are reagent compositions comprising an aldoxime and ketoxime with an alkyl substituent. Also provided are methods of metal recovery using these reagent compositions.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: July 2, 2013
    Assignee: Cognis IP Management GmbH
    Inventors: Michael Virnig, Jack Bender, Nathan C. Emmerich
  • Patent number: 8460623
    Abstract: Provided are methods using ketoximes and/or aldoximes, including 3-methyl-5-alkylsalicylaldoxime and/or 3-methyl-5-alkyl-2-hydroxyacetophenone oxime, in reagent compositions for metal extraction/isolation. One such method is of extracting a metal from a nitrate-containing aqueous solution. Another such method is of extracting a metal from an aqueous ammoniacal solution. A third method is of multi-metal extraction based on a predetermined pH.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: June 11, 2013
    Assignee: Cognis IP Management GmbH
    Inventors: Michael Virnig, Jack Bender, Nathan C. Emmerich
  • Patent number: 8449850
    Abstract: A method for the extraction and purification of molybdenum, the method comprising the steps of: transferring an irradiated fuel solution to an extraction system, the irradiated fuel solution comprising iodine and molybdenum and other fission products, the extraction system comprising at least one sorbent column; passing the irradiated fuel solution upwards through the at least one sorbent-containing extraction column; directing the irradiated fuel solution towards a fuel management system by means of at least one discharge alignment valve; directing the extraction column eluate towards an iodine removal system; removing the iodine from the extraction column eluate; purifying the extraction column eluate; and collecting the purified eluate. Also disclosed is an apparatus for accomplishing the aforementioned method.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: May 28, 2013
    Assignee: Babcock & Wilcox Technical Services Group, Inc.
    Inventors: Daniel E. Glenn, Scott B. Aase, William R. Stagg
  • Patent number: 8431107
    Abstract: A method for preparing ammonium heptamolybdate with the steps of: i) adding a molybdenum-containing organic phase to a liquid-liquid reextraction apparatus or to a desorption apparatus, and ii) directly cold-crystallization ammonium heptamolybdate by cooling the resulting reextraction or desorption solution.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: April 30, 2013
    Assignee: H.C. Starck GmbH
    Inventors: Viktor Stoller, Michael Erb, Juliane Meese-Marktscheffel, Benno Decker
  • Publication number: 20130078167
    Abstract: A method of recovering vanadium, nickel and molybdenum from heavy crude oil refinery residues comprises pyrolysis and combustion of the residues at temperatures up to 900° C. to produce an ash, converting the ash to an aqueous slurry comprising sodium hydroxide as leading agent and hydrogen peroxide as oxidizer, and extracting vanadium, nickel and molybdenum salts and oxides from the slurry. Extraction processes for the metals are disclosed.
    Type: Application
    Filed: March 3, 2011
    Publication date: March 28, 2013
    Applicant: INTEVEP, S.A.
    Inventor: Matthew Stephen Grimley
  • Patent number: 8372360
    Abstract: The present invention relates generally to a process for controlled leaching and sequential recovery of two or more metals from metal-bearing materials. In one exemplary embodiment, recovery of metals from a leached metal-bearing material is controlled and improved by providing a high grade pregnant leach solution (“HGPLS”) and a low grade pregnant leach solution (“LGPLS”) to a single solution extraction plant comprising at least two solution extractor units, at least two stripping units, and, optionally, at least one wash stage.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: February 12, 2013
    Assignee: Freeport-McMoran Corporation
    Inventors: Barbara J. Savage, David G. Meadows, Wayne W. Hazen
  • Patent number: 8372361
    Abstract: The present invention relates generally to a process for controlled leaching and sequential recovery of two or more metals from metal-bearing materials. In one exemplary embodiment, recovery of metals from a leached metal-bearing material is controlled and improved by providing a high grade pregnant leach solution (“HGPLS”) and a low grade pregnant leach solution (“LGPLS”) to a single solution extraction plant comprising at least two solution extractor units, at least two stripping units, and, optionally, at least one wash stage.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: February 12, 2013
    Assignee: Freeport-McMoran Corporation
    Inventors: Barbara J. Savage, David G. Meadows, Wayne W. Hazen
  • Patent number: 8343446
    Abstract: The oxine ligands 5-chloro-8-hydroxyquiniline and 5-sulfoxyl-8-hydroxyquinoline are covalently bound, using, for example, the Mannich reaction, to a silica gel polyamine composite made from a silanized amorphous silica xerogel and polyallylamine. The resulting modified composites, termed CB-1 (X?Cl) and SB-1 (X?SO3H), respectively, show a clear selectivity for trivalent over divalent ions and selectivity for gallium over aluminum. The compounds of the invention can be applied for the sequestration of metals, such as heavy metals, from contaminated mine tailing leachates.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: January 1, 2013
    Assignee: The University of Montana
    Inventors: Edward Rosenberg, Paul Miranda, Yuen Onn Wong
  • Patent number: 8328900
    Abstract: Provided herein are processes for recovering molybdenum and/or other value metals (e.g., uranium) present in aqueous solutions from a large range of concentrations: from ppm to grams per liter via a solvent extraction process by extracting the molybdenum and/or other value metal from the aqueous solution by contacting it with an organic phase solution containing a phosphinic acid, stripping the molybdenum and/or other value metal from the organic phase solution by contacting it with an aqueous phase strip solution containing an inorganic compound and having a ?1.0 M concentration of free ammonia, and recovering the molybdenum and/or other value metal by separating it from the aqueous phase strip solution. When the molybdenum and/or other value metal are present only in low concentration, the processes can include an organic phase recycle step and/or an aqueous phase strip recycle step in order to concentrate the metal prior to recover.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: December 11, 2012
    Assignee: Cytec Technology Corp.
    Inventors: Troy Allan Bednarski, Violina Antoneta Cocalia, Matthew Dean Soderstrom, Eduardo Alberto Kamenetzky, Andrew Michael Cameron, Douglas Harris
  • Patent number: 8318113
    Abstract: A solid composition comprises: —MnO2; and—a compound represented by the general formula (I) wherein: R is a polymer; each Y is independently a hydrogen or a negative charge; Z is either hydrogen or is not present; each n is independently 1, 2, 3, 4, 5 or 6; wherein the MnO2 is bound to the compound of formula (I) so as to coat the surface thereof. Such a composition may be used for the separation of polyvalent metal species, such as Mo, from one or more accompanying impurities.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: November 27, 2012
    Assignee: Mallinckrodt LLC
    Inventor: Luis Antonio Miguel Marques Barbosa
  • Patent number: 8298510
    Abstract: The addition of a compatible metal salt crystal to the organic solution entering the mixer(s) in the solvent extraction stage(s) and/or the stripping stage(s), or to the emulsion mixture of the organic solution and the aqueous solution in the mixer(s), or to the mixture of the organic solution and the aqueous solution in a settler tank(s) following the mixer(s) in the solvent extraction and/or stripping stage(s) following the leaching of metal values from the ore containing that/those value(s) into an aqueous solution, and prior to the further refining of those values in processes, such as electrowinning, during mining operations for those metal values in order to improve the phase separation of the organic phase and the aqueous phase, and to promote the removal of contaminants from the organic phase.
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: October 30, 2012
    Assignee: BASF Corporation
    Inventors: Eladio Rojas, Hans C. Hein
  • Patent number: 8277765
    Abstract: Process for recovering molybdate or tungstate from an aqueous solution, in which molybdate or tungstate is bound to a water-insoluble, cationized inorganic carrier material from the aqueous solution at a pH in the range from 2 to 6, the laden carrier material is separated off and the bound molybdate or tungstate is liberated once again into aqueous solution at a pH in the range from 6 to 14. The process is suitable for recovering molybdate or tungstate in the delignification of pulp with hydrogen peroxide in the presence of molybdate or tungstate as catalyst. The recovered molybdate or tungstate can be recycled to the delignification.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: October 2, 2012
    Assignee: Evonik Degussa GmbH
    Inventors: Thomas Dietz, Hans Ulrich Süss
  • Publication number: 20120219474
    Abstract: Reagent compositions, methods for their manufacture and methods of their use are described. In particular, provided are reagent compositions comprising an aldoxime and ketoxime with an alkyl substituent. Also provided are methods of metal recovery using these reagent compositions.
    Type: Application
    Filed: February 22, 2012
    Publication date: August 30, 2012
    Applicant: Cognis IP Management GmbH
    Inventors: Michael Virnig, Jack Bender, Nathan C. Emmerich
  • Publication number: 20120219476
    Abstract: Provided are methods using ketoximes and/or aldoximes, including 3-methyl-5-alkylsalicylaldoxime and/or 3-methyl-5-alkyl-2-hydroxyacetophenone oxime, in reagent compositions for metal extraction/isolation. One such method is of extracting a metal from a nitrate-containing aqueous solution. Another such method is of extracting a metal from an aqueous ammoniacal solution. A third method is of multi-metal extraction based on a predetermined pH.
    Type: Application
    Filed: February 22, 2012
    Publication date: August 30, 2012
    Inventors: Michael Virnig, Jack Bender, Nathan C. Emmerich
  • Publication number: 20120219475
    Abstract: Provided are methods using a ketoxime in metal extraction. One aspect of the invention relates to a method for the recovery of metal from a metal-containing aqueous solution at an elevated temperature using a ketoxime. Another aspect relates to a method of separating iron/copper using a specific ketoxime. Aldoximes may also be added to the reagent compositions used in these methods.
    Type: Application
    Filed: February 22, 2012
    Publication date: August 30, 2012
    Inventors: Michael Virnig, Jack Bender, Nathan C. Emmerich
  • Patent number: 8242040
    Abstract: A process for the removal of corrosion metal contaminants from a carbonylation catalyst solution comprising an iridium and/or rhodium carbonylation catalyst, an alkali and/or alkaline earth metal and corrosion metal contaminants in which the catalyst solution is contacted with a cation exchange resin having its active sites partially loaded with a sufficient amount of alkali and/or alkaline earth metal to maintain the concentration of said alkali and/or alkaline earth metal in the catalyst solution and recovering a catalyst solution of reduced corrosion metal contaminant content.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: August 14, 2012
    Assignee: BP Chemicals Limited
    Inventors: Andrew David Poole, Stephen James Smith
  • Patent number: 8216533
    Abstract: The invention is directed to a process for the continuous preparation of ammonium paratungstate hydrate by back reextraction of a tungsten-laden organic phase with an ammonia-containing aqueous solution in a mixer-settler apparatus. The reextraction is carried out at an NH3:W molar ratio of from 0.83 to 1.30, and a volume feed ratio of the tungsten-laden organic phase to the ammonia-containing aqueous solution of from 5 to 25. The above crystalline is in high purity and in high yield. The production method can be carried out in a simple and energy-efficient manner.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: July 10, 2012
    Assignee: H.C. Starck GmbH
    Inventors: Viktor Stoller, Michael Erb, Juliane Meese-Marktscheffel, Michael Lohse, Klaus-Jürgen Marschall, Frank Schrumpf
  • Patent number: 7968064
    Abstract: The present invention provides a method for extraction of metals selected from Cr, Mo, Pd, Tc, W, Re, and Pu using a new extractant of methyliminobisalkylacetamide represented by a formula (I): CH3—N—(CH2CONR2)2??(I) wherein R represents an alkyl group having 8-12 carbon atoms.
    Type: Grant
    Filed: August 20, 2009
    Date of Patent: June 28, 2011
    Assignee: Japan Atomic Energy Agency
    Inventors: Yuji Sasaki, Yoshihiro Kitatsuji, Takaumi Kimura, Makoto Arisaka
  • Publication number: 20110014097
    Abstract: A system and method for producing molybdenum oxide(s) from molybdenum sulfide are disclosed. The system includes a pressure leach vessel, a solid-liquid separation stage coupled to the pressure leach vessel, a solvent-extraction stage coupled to the solid-liquid separation stage, and a base stripping stage coupled to the solvent-extraction stage. The method includes providing a molybdenum sulfide feed, subjecting the feed to a pressure leach process, subjecting pressure leach process discharge to a solid-liquid separation process to produce a discharge liquid stream and a discharge solids stream, and subjecting the discharge liquid stream to a solvent extraction and a base strip process.
    Type: Application
    Filed: September 27, 2010
    Publication date: January 20, 2011
    Applicant: FREEPORT-MCMORAN CORPORATION
    Inventors: Peter Amelunxen, John C. Wilmot, Chris Easton, Wayne W. Hazen
  • Patent number: 7824633
    Abstract: A system and method for producing molybdenum oxide(s) from molybdenum sulfide are disclosed. The system includes a pressure leach vessel, a solid-liquid separation stage coupled to the pressure leach vessel, a solvent-extraction stage coupled to the solid-liquid separation stage, and a base stripping stage coupled to the solvent-extraction stage. The method includes providing a molybdenum sulfide feed, subjecting the feed to a pressure leach process, subjecting pressure leach process discharge to a solid-liquid separation process to produce a discharge liquid stream and a discharge solids stream, and subjecting the discharge liquid stream to a solvent extraction and a base strip process.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: November 2, 2010
    Assignee: Freeport-McMoran Corporation
    Inventors: Peter Amelunxen, John C. Wilmot, Chris Easton, Wayne W. Hazen
  • Patent number: 7807058
    Abstract: Toxic substances such as heavy metals are extracted from a medium using a sorbent composition. The sorbent composition is derived by sulfidation of red mud, which contains hydrated ferric oxides derived from the Bayer processing of bauxite ores. Exemplary sulfidizing compounds are H2S, Na2S, K2S, (NH4)2S, and CaSx. The sulfur content typically is from about 0.2 to about 10% above the residual sulfur in the red mud. Sulfidized red mud is an improved sorbent compared to red mud for most of the heavy metals tested (Hg, Cr, Pb, Cu, Zn, Cd, Se, Th, and U). Unlike red mud, sulfidized red mud does not leach naturally contained metals. Sulfidized red mud also prevents leaching of metals when mixed with red mud. Mixtures of sulfidized red mud and red mud are more effective for sorbing other ions, such as As, Co, Mn, and Sr, than sulfidized red mud alone.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: October 5, 2010
    Assignee: J.I. Enterprises, Inc.
    Inventor: Joseph Iannicelli
  • Publication number: 20100226838
    Abstract: The present invention relates to a process for the removal of metal catalyst degradation products from a bleed stream of a catalytic chemical reaction process, wherein the catalyst is based on a metal selected from those in group VIII of the periodic table, chromium, copper, molybdenum, tungsten, rhenium, vanadium, titanium and zirconium, said process comprising treatment of the bleed stream with an alkali metal carbonate or ammonium carbonate source to form a solid complex or an aqueous solution of said solid complex, and removal of the solid complex or the aqueous solution of said solid complex from the bleed stream.
    Type: Application
    Filed: May 28, 2008
    Publication date: September 9, 2010
    Inventors: Anand Kumar Bachasingh, Arie Van Zon
  • Patent number: 7763566
    Abstract: Toxic substances such as heavy metals are extracted from a medium using a sorbent composition. The composition is derived by sulfidation of red mud, which contains hydrated ferric oxides derived from the Bayer processing of bauxite ores. Exemplary sulfidizing compounds are H2S, Na2S, K2S, (NH4)2S, and CaSx. The sulfur content typically is from about 0.2 to about 10% above the residual sulfur in the red mud. Sulfidized red mud is an improved sorbent compared to red mud for most of the heavy metals tested (Hg, Cr, Pb, Cu, Zn, Cd, Se, Th, and U). Unlike red mud, sulfidized red mud does not leach naturally contained metals. Sulfidized red mud also prevents leaching of metals when mixed with red mud. Mixtures of sulfidized red mud and red mud are more effective for sorbing other ions, such as As, Co, Mn, and Sr, than sulfidized red mud alone.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: July 27, 2010
    Assignee: J.I. Enterprises, Inc.
    Inventor: Joseph Iannicelli
  • Patent number: 7736607
    Abstract: The process of this invention is directed to the removal of metals from an unsupported spent catalyst. The catalyst is subjected to leaching reactions. Vanadium is removed as a precipitate, while a solution comprising molybdenum and nickel is subjected to further extraction steps for the removal of these metals. Molybdenum may alternately be removed through precipitation.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: June 15, 2010
    Assignee: Chevron U.S.A. Inc
    Inventor: Paul J. Marcantonio
  • Patent number: 7737068
    Abstract: A process for recovering catalytic metals from fine catalyst slurried in heavy oil comprises pyrolizing fine catalyst slurried in heavy oil to provide one or more lighter oil products and a coke-like material and recovering catalytic metals from the coke-like material.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: June 15, 2010
    Assignee: Chevron U.S.A. Inc.
    Inventors: Christopher A. Powers, Donald H. Mohr, Bruce E. Reynolds, Jose Guitian Lopez
  • Publication number: 20090274598
    Abstract: Process for recovering molybdate or tungstate from an aqueous solution, in which molybdate or tungstate is bound to a water-insoluble, cationized inorganic carrier material from the aqueous solution at a pH in the range from 2 to 6, the laden carrier material is separated off and the bound molybdate or tungstate is liberated once again into aqueous solution at a pH in the range from 6 to 14. The process is suitable for recovering molybdate or tungstate in the delignification of pulp with hydrogen peroxide in the presence of molybdate or tungstate as catalyst. The recovered molybdate or tungstate can be recycled to the delignification.
    Type: Application
    Filed: April 28, 2009
    Publication date: November 5, 2009
    Applicant: EVONIK DEGUSSA GMBH
    Inventors: Thomas Dietz, Hans Ulrich Suss
  • Patent number: 7531690
    Abstract: A catalyst for the production of an oxygen-containing compound, comprising palladium, tungsten and zirconium, a production process thereof, and a production process of an oxygen-containing compound using the catalyst. The catalyst can provide an oxygen-containing compound from a lower olefin and oxygen with high productivity and high selectivity.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: May 12, 2009
    Assignee: Showa Denko K.K.
    Inventor: Toshio Okuhara
  • Publication number: 20090110620
    Abstract: The process of this invention is directed to the removal of metals from an unsupported spent catalyst. The catalyst is subjected to leaching reactions. Vanadium is removed as a precipitate, while a solution comprising molybdenum and nickel is subjected to further extraction steps for the removal of these metals. Molybdenum may alternately be removed through precipitation.
    Type: Application
    Filed: December 30, 2008
    Publication date: April 30, 2009
    Inventor: Paul J. Marcantonio
  • Patent number: 7494630
    Abstract: A new method to strip metals from organic solvents in a manner that allows for the recycle of the stripping agent. The method utilizes carbonate solutions of organic amines with complexants, in low concentrations, to strip metals from organic solvents. The method allows for the distillation and reuse of organic amines. The concentrated metal/complexant fraction from distillation is more amenable to immobilization than solutions resulting from current practice.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: February 24, 2009
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Terry A. Todd, Jack D. Law, R. Scott Herbst, Valeriy N. Romanovskiy, Igor V. Smirnov, Vasily A. Babain, Vyatcheslav M. Esimantovski
  • Patent number: 7485267
    Abstract: The process of this invention is directed to the removal of metals from an unsupported spent catalyst. The catalyst is subjected to leaching reactions. Vanadium is removed as a precipitate, while a solution comprising molybdenum and nickel is subjected to further extraction steps for the removal of these metals. Molybdenum may alternately be removed through precipitation.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: February 3, 2009
    Assignee: Chevron U.S.A. Inc.
    Inventor: Paul J. Marcantonio
  • Patent number: 7452488
    Abstract: The present invention is directed to a composition consisting essentially of: a) from about 60 to about 99 mole % of SnO2, and b) from about 1 to about 40 mole % of one or more materials selected from the group consisting of i) Nb2O5, ii) NbO, iii) NbO2, iv) WO2, v) a material selected consisting of a) a mixture of MoO2 and Mo and b) Mo, vi) W, vii) Ta2O5, and viii) mixtures thereof, wherein the mole % s are based on the total product and wherein the sum of components a) and b) is 100. The invention is also directed to the sintered product of such composition, a sputtering target made from the sintered product and a transparent electroconductive film made from the composition.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: November 18, 2008
    Assignee: H.C. Starck Inc.
    Inventors: Prabhat Kumar, Rong-Chein Richard Wu, Shuwei Sun
  • Publication number: 20080166280
    Abstract: A process for converting molybdenum technical oxide into a purified molybdenum trioxide product is provided, generally comprising the steps of: combining molybdenum technical oxide with an oxidizing agent and a leaching agent in a reactor under suitable conditions to effectuate the oxidation of residual MoS2, MoO2 and other oxidizable molybdenum oxide species to MoO3, as well as the leaching of any metal oxide impurities; precipitating the MoO3 species in a suitable crystal form; filtering and drying the crystallized MoO3 product; and recovering and recycling any solubilized molybdenum.
    Type: Application
    Filed: November 16, 2007
    Publication date: July 10, 2008
    Applicant: ALBEMARLE NETHERLANDS B.V.
    Inventors: Pieter Johannes Daudey, Harmannus Willem Homan Free, Bas Tappel, Parmanand Badloe, Johan Van Oene, Christopher Samuel Knight, Thanikavelu Manimaran