Ion Exchanging Or Liquid-liquid Extracting Patents (Class 423/63)
  • Patent number: 10844459
    Abstract: A method for extracting the tantalum from an acid aqueous phase A1 comprising at least one step comprising the bringing of the aqueous phase A1 into contact with a phase A2 not miscible with water, and then the separation of the aqueous phase A1 from the phase A2, the phase A2 consisting of one ionic liquid or a mixture of ionic liquids as an extractant. A method for recovering the tantalum that implements this extraction method and to a use of an ionic liquid or of a mixture of ionic liquids as an extractant, in order to extract the tantalum from such an aqueous phase A1.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: November 24, 2020
    Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE DE MONTPELLIER, UNIVERSITE DE CHAMBERY, ECOLE NATIONALE SUPERIEURE DE CHIMIE DE MONTPELLIER, TND, UNIVERSITE DE LORRAINE
    Inventors: Raphael Turgis, Guilhem Arrachart, Stéphane Pellet-Rostaing, Micheline Draye, Sophie Legeai, David Virieux, Christian Thomas
  • Patent number: 10822253
    Abstract: Methods for removing anions from an aqueous solution include contacting the aqueous solution with an initial organic phase composition in a primary stage to form a first mixture, the initial organic phase composition including a quaternary amine and a weak organic acid; separating a nitrate-depleted raffinate from the first mixture; mixing the remaining organic phase (now containing nitrate) with a first basic solution to obtain a second mixture; separating an aqueous phase sulfate-containing scrub solution from the second mixture; mixing the remaining organic phase with a second basic solution to form a third mixture; and separating the third mixture into an aqueous phase nitrate-rich solution and a secondary organic phase composition. The secondary organic phase composition can be recycled. The raffinate, the sulfate-containing scrub solution, and the nitrate-rich solution can then be further processed.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: November 3, 2020
    Assignee: Winner Water Services
    Inventors: Gary Alan Kordosky, David Bruce Dreisinger, Michael Schrock
  • Patent number: 9702025
    Abstract: A method (10) for the extraction and recovery of vanadium from its ores, the method (10) characterised by the steps of: (i) Acid leaching (12) of an ore containing vanadium and iron to extract vanadium and iron into solution; (ii) Passing the product (78) of the leach step (i) to a solid/liquid separation step (80); (iii) Passing the liquid product (82) of separation step (ii) to a solvent extraction step (14) in which vanadium and iron are extracted into an organic extractant from that liquid product; (iv) Passing the loaded organic extractant produced in step (iii) to a stripping step (16, 18) in which acid is used to selectively and sequentially strip the vanadium and iron from the organic extractant; and (v) Passing the vanadium containing strip solution of step (iv) to a recovery step (104).
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: July 11, 2017
    Assignee: TNG Limited
    Inventors: Damian Edward Gerard Connelly, Denis Stephen Yan, Sai Wei Lam
  • Patent number: 8986425
    Abstract: A method for recovering rare earth compounds, vanadium and nickel from waste vanadium-nickel catalysts, comprising steps of: acid leaching, by soaking waste vanadium-nickel catalysts into a sulfuric acid solution and obtaining a mixture containing alumina silica slag; sedimentation, by filtering out the alumina silica slag from the mixture to obtain a filtrate, and then adding a salt into the filtrate to precipitate rare earth double salts followed by isolating a sediment of rare earth double salts and a liquid solution via filtration; and extraction, by providing and adding an alkali into the sediment of rare earth double salts followed by further soaking the rare earth double salts in an acid solution to precipitate rare earth oxalate or rare earth carbonate, and adding an oxidizer into the liquid solution to adjust the pH value thereof and then extracting vanadium and nickel from the liquid solution via an ion-exchange resin.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: March 24, 2015
    Assignee: Hong Jing Environment Company
    Inventors: Yu-Lung Sun, Ming-Zhe Tsai, Yung-Hao Liu
  • 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: 8945491
    Abstract: A method for extracting vanadium from shale, the method including: a) grinding the shale into fine powders, mixing the fine powders with an additive in a mass ratio of 1:0.04-0.12 to yield a mixture, heating the mixture to a temperature of between 850 and 950° C. at a heating rate of 5-9° C./min, and baking the mixture for between 30 and 90 min; b) immersing the product in water and acid respectively to yield a first solution and a second solution, combining the two solutions, and performing ion exchange adsorption on the combined solution using a styrene-divinylbenzene based macroporous anion-exchange resin; and c) performing desorption, purification, and precipitation to yield poly ammonium vanadate, and calcining the poly ammonium vanadate at a temperature of between 450 and 530° C. for between 20 and 50 min to yield V2O5.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: February 3, 2015
    Assignee: Wuhan University of Technology
    Inventors: Yimin Zhang, Xiaobo Zhu, Tao Liu, Jing Huang, Tiejun Chen, Shenxv Bao
  • Patent number: 8871163
    Abstract: Process for purifying vanadium oxide that includes cationic exchange resin and solvent extraction.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: October 28, 2014
    Assignee: American Vanadium Corp.
    Inventor: Michael Adam Drozd
  • Patent number: 8846225
    Abstract: Methods for making a recycled or refurbished electrode material for an energy-storage device are provided. One example method comprises harvesting a lithium-deficient electrode material from a recycling or waste stream, and replenishing at least some lithium in the lithium-deficient electrode material. A second example method comprises breeching an enclosure of a cell of an energy storage device, replenishing at least some lithium in a lithium-deficient electrode material of the cell, and sealing the enclosure of the cell.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: September 30, 2014
    Inventor: Steven E. Sloop
  • Publication number: 20140134083
    Abstract: A method for extracting vanadium from shale, the method including: a) grinding the shale into fine powders, mixing the fine powders with an additive in a mass ratio of 1:0.04-0.12 to yield a mixture, heating the mixture to a temperature of between 850 and 950° C. at a heating rate of 5-9° C./min, and baking the mixture for between 30 and 90 min; b) immersing the product in water and acid respectively to yield a first solution and a second solution, combining the two solutions, and performing ion exchange adsorption on the combined solution using a styrene-divinylbenzene based macroporous anion-exchange resin; and c) performing desorption, purification, and precipitation to yield poly ammonium vanadate, and calcining the poly ammonium vanadate at a temperature of between 450 and 530° C. for between 20 and 50 min to yield V2O5.
    Type: Application
    Filed: August 26, 2013
    Publication date: May 15, 2014
    Applicant: Wuhan University of Technology
    Inventors: Yimin ZHANG, Xiaobo ZHU, Tao LIU, Jing HUANG, Tiejun CHEN, Shenxv BAO
  • Patent number: 8721998
    Abstract: The application of aqueous solution of magnesium bicarbonate and/or calcium bicarbonate in the process of extraction separation and purification of metals is disclosed, wherein the aqueous solution of magnesium bicarbonate and/or calcium bicarbonate is used as an acidity balancing agent, in order to adjust the balancing pH value of the extraction separation process which uses an acidic organic extractant, improve the extraction capacity of organic phase, and increase the concentration of metal ions in the loaded organic phase.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: May 13, 2014
    Assignee: Grirem Advanced Materials Co., Ltd.
    Inventors: Xiaowei Huang, Zhiqi Long, Xinlin Peng, Hongwei Li, Guilin Yang, Dali Cui, Chunmei Wang, Na Zhao, Liangshi Wang, Ying Yu
  • Publication number: 20140079609
    Abstract: Process for purifying vanadium oxide that includes cationic exchange resin and solvent extraction.
    Type: Application
    Filed: March 15, 2013
    Publication date: March 20, 2014
    Inventor: Michael Adam Drozd
  • Patent number: 8669013
    Abstract: The present invention relates to processes and apparatuses for generating electrical power from certain non-gaseous carbonaceous feedstocks through the integration of catalytic hydromethanation technology with fuel cell technology.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: March 11, 2014
    Assignee: Greatpoint Energy, Inc.
    Inventors: Charles Allen Powell, Pattabhi K. Raman, Earl T. Robinson, Avinash Sirdeshpande
  • Patent number: 8603428
    Abstract: The present invention concerns a method for producing calcium carbonate containing the steps of extraction of alkaline industrial waste or by-products using as a first extraction solvent an aqueous solution of a salt formed from a weak acid and a weak base, whereby a vanadium-enriched first residue is allowed to settle and a calcium-rich first filtrate is formed, filtration, whereby the first filtrate is separated from the first residue, carbonation of the calcium-rich first filtrate using a carbonation gas, whereby calcium carbonate precipitates and a second filtrate is formed, and a second filtration, whereby the calcium carbonate is separated from the second filtrate. Further, the present invention concerns a method for extracting calcium carbonate and vanadium from alkaline industrial waste or by-products.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: December 10, 2013
    Assignees: Aalto University Foundation, Abo Akademi, Rautaruukki Oyj
    Inventors: Sebastian Teir, Sanni Eloneva, Hannu Revitzer, Ron Zevenhoven, Justin Salminen, Carl-Johan Fogelholm, Esko Poylio
  • Publication number: 20130195738
    Abstract: A process and system for recovering titanium dioxide and other value metals from a titanium bearing solid is disclosed. The process includes leaching the solid in hydrochloric acid to produce a leachate comprising undissolved solids and a leach solution comprising the titanium dioxide and the value metals, wherein the hydrochloric acid concentration is maintained above a value required to maintain the titanium dioxide and the value metals dissolved in the leach solution at atmospheric pressure. The leachate is separated into the leach solution and the undissolved solids. The concentration of hydrochloric acid concentration in the leach solution is reduced to recover titanium dioxide by hydrolysis and precipitation to produce a titanium dioxide rich slurry. In a preferred embodiment, HCl is recovered with a matrix solution.
    Type: Application
    Filed: August 4, 2012
    Publication date: August 1, 2013
    Applicant: NEOMET TECHNOLOGIES INC.
    Inventors: Bryn Harris, Carl White
  • 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: 8250775
    Abstract: The present invention discloses an automatic plant and a method of stockage in a covered yard of petcoke fuel with high humidity-contents, natural dehumidification up to set humidity values and subsequent reuptake for conveyance to the silos feeding a thermal unit.
    Type: Grant
    Filed: February 18, 2008
    Date of Patent: August 28, 2012
    Assignee: Magaldi Ricerche E Brevetti S.R.L.
    Inventor: Mario Magaldi
  • Publication number: 20110274597
    Abstract: The application of aqueous solution of magnesium bicarbonate and/or calcium bicarbonate in the process of extraction separation and purification of metals is disclosed, wherein the aqueous solution of magnesium bicarbonate and/or calcium bicarbonate is used as an acidity balancing agent, in order to adjust the balancing pH value of the extraction separation process which uses an acidic organic extractant, improve the extraction capacity of organic phase, and increase the concentration of metal ions in the loaded organic phase.
    Type: Application
    Filed: January 14, 2010
    Publication date: November 10, 2011
    Inventors: Xiaowei Huang, Zhiqi Long, Xinlin Peng, Hongwei Li, Guilin Yang, Dali Cui, Chunmei Wang, Na Zhao, Liangshi Wang, Ying Yu
  • Publication number: 20110262323
    Abstract: The present invention relates to processes and apparatuses for hydromethanating a vanadium-containing carbonaceous feedstock while recovering at least a portion of the vanadium content originally present in the carbonaceous feedstock.
    Type: Application
    Filed: April 26, 2011
    Publication date: October 27, 2011
    Applicant: GREATPOINT ENERGY, INC.
    Inventors: Alkis S. Rappas, Robert A. Spitz
  • Patent number: 8034314
    Abstract: The present invention provides a photoreactive reagent that binds specifically to Ca2+-binding proteins, links to them covalently after photo-activation, and labels them. The novel reagent enables the characterization, purification, inhibition and screening of Ca2+-binding proteins, as well as the preparation of a new affinity chromatography matrix and a new protein biosensor. The invention also relates to the use of the reagent in inhibiting apoptosis and necrosis and in diagnosing a disorder associated with a defect in the function of a Ca2+-binding protein, and in the preparation of a medicament for treating such disorders.
    Type: Grant
    Filed: February 17, 2005
    Date of Patent: October 11, 2011
    Assignee: The National Institute for Biotechnology in the Negev Ltd.
    Inventors: Varda Shoshan-Bar-Matz, Adrian Israelson
  • Publication number: 20110139628
    Abstract: The present invention concerns a method for producing calcium carbonate containing the steps of extraction of alkaline industrial waste or by-products using as a first extraction solvent an aqueous solution of a salt formed from a weak acid and a weak base, whereby a vanadium-enriched first residue is allowed to settle and a calcium-rich first filtrate is formed, filtration, whereby the first filtrate is separated from the first residue, carbonation of the calcium-rich first filtrate using a carbonation gas, whereby calcium carbonate precipitates and a second filtrate is formed, and a second filtration, whereby the calcium carbonate is separated from the second filtrate. Further, the present invention concerns a method for extracting calcium carbonate and vanadium from alkaline industrial waste or by-products.
    Type: Application
    Filed: May 29, 2009
    Publication date: June 16, 2011
    Applicant: Aalto University Foundation
    Inventors: Sebastian Teir, Sanni Eloneva, Hannu Revitzer, Ron Zevenhoven, Justin Salminen, Carl-Johan Fogelholm, Esko Poylio
  • Publication number: 20110091365
    Abstract: The present application relates to novel gel-type or macroporous picolylamine resins which are based on at least one monovinylaromatic compound and at least one polyvinylaromatic compound and/or a (meth)acrylic compound and contain tertiary nitrogen atoms in structures of the general formula (I) as functional group, where R1 is an optionally substituted radical from the group consisting of picolyl, methylquinoline and methylpiperidine, R2 is —CH2—S—CH2COOR3 or —CH2—S—C1-C4-alkyl or —CH2—S—CH2CH(NH2)COOR3 or —CH2—S—CH2—CH(OH)—CH2(OH) or or derivatives thereof or —C?S(NH2), R3 is a radical from the group consisting of H, Na and K, m is an integer from 1 to 4, n and p are each, independently of one another, a number in the range from 0.1 to 1.9 and the sum of n and p is 2 and M is the polymer matrix, a process for preparing them and their uses, in particular the use in hydrometallurgy and electroplating.
    Type: Application
    Filed: February 27, 2009
    Publication date: April 21, 2011
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Reinhold Klipper, Michael Schelhaas, Duilio Rossoni
  • 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: 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
  • 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: 7282187
    Abstract: A process for selectively extracting metal values, including, uranium, thorium, scandium and zirconium, from starting materials which include the metal values. The process is particularly well suited to extracting metal and recovering metal values from tantalum/niobium production process ore residues.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: October 16, 2007
    Assignee: Caboi Corporation
    Inventors: Patrick M. Brown, Robert A Hard, Donna D. Harbuck, G. Kyle Green
  • Patent number: 7182925
    Abstract: A method for the dissolution and purification of tantalum ore and synthetic concentrates is described. The method preferably uses ammonium bifluoride as the fluoride source in place of the hydrofluoric acid used in the conventional methods. Other fluoride compounds such as NaF, KF, and CaF2 may be used alone or in combination with ammonium bifluoride. The tantalum concentrate and fluoride source are combined with sulfuric acid to form a solution containing tantalum values and impurities. The tantalum values are then separated from the impurities by solvent extraction.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: February 27, 2007
    Assignee: Osram Sylvania Inc.
    Inventors: Raj P. Singh Gaur, Robert G. Mendenhall
  • Patent number: 7025899
    Abstract: The preparation of concentrated solutions of oxime metal extractants, such as aldoximes and ketoximes, or mixtures of aldoxime and ketoxime, and the use thereof in formulating or preparing extraction reagent compositions for use in an extractant organic phase in a process of extracting metals from aqueous solutions containing metal values; and in particular, to concentrates which are solutions of individual ketoxime or aldoxime or mixtures of water-insoluble hydroxy aldoximes and ketoximes, in varying ratios by weight of 1:100 aldoxime to ketoxime, or conversely, 100:1 ketoxime to aldoxime, in water-immiscible hydrocarbon solvents or equilibrium modifiers. The invention also provides for maintaining stability of concentrates determined by accelerating rate calorimetry to define the ranges of oxime concentration and volume whereby the concentrate will be a stable, flowable, pourable and pumpable concentrate which can be safely stored long term.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: April 11, 2006
    Assignee: Cognis Corporation
    Inventors: R. Brantley Sudderth, George A. Wolfe, Ralph L. Jensen, Gary A. Kordosky, Michael J. Virnig, Mary Collins, Stephen M. Olafson, Terry L. Crandell, Hans C. Hein
  • Publication number: 20040208808
    Abstract: An organic solvent extraction mixture which includes a first extractant which is a substituted imidazole or benzimidazole, a non-selective strongly acidic cation second extractant, such as a sulphonic acid (R—SO3H), to facilitate phase transfer of base metal ions from an aqueous weakly acidic sulphate solution into the organic phase, a modifier to improve the characteristics of the organic phase with respect to metal complex solubility to avoid third phase formation, completeness and ease of stripping, viscosity and phase disengagement, and a diluent.
    Type: Application
    Filed: December 11, 2003
    Publication date: October 21, 2004
    Inventors: Jozef Marie Schaekers, Jan Gysbert Hermanus Dupreez
  • Patent number: 6709641
    Abstract: The invention relates to a method of extracting anions based on metals of groups IV B to VIII of the periodic table from aqueous solutions thereof, wherein compounds of general formula are used as extractants, in which a maximum of two of the R1, R2, R3 and R4 substituents represent hydrogen atoms and the remaining substituents represent identical or different alkyl or aminoakyl groups, which are optionally branched and which contain on average at least 5 C atoms.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: March 23, 2004
    Assignee: H.C. Starck GmbH & Co. KG
    Inventors: Wilfried Gutknecht, Wolfgang Mathy
  • Patent number: 6652819
    Abstract: A process for the production of a vanadium compound from carbonaceous residues containing vanadium, which includes the steps of: (a) combusting the carbonaceous residues at a temperature of 500-690° C. in an oxygen-containing gas to form vanadium-containing combustion residues; (b) heating the vanadium-containing combustion residues at a temperature T in ° C. under an oxygen partial pressure of at most T in kPa wherein T and P meet with the following conditions: log10(P)=−3.45×10−3×T+2.21 500≦T≦1300 to obtain a solid product containing less than 5% by weight of carbon and vanadium at least 80% of which is tetravalent vanadium oxide; (c) selectively leach tetravalent vanadium ion with sulfuring acid at pH in the range of 1.5-4; (d) separating a liquid phase from the leached mixture; (e) adding an alkaline substance to the liquid phase to adjust the pH thereof in the range of 4.5-7.
    Type: Grant
    Filed: June 5, 2001
    Date of Patent: November 25, 2003
    Assignee: Chiyoda Corporation
    Inventors: Yoshimi Shiroto, Ataru Wakabayashi
  • Patent number: 6576099
    Abstract: Methods to at least partially reduce a niobium oxide are described wherein the process includes heat treating the niobium oxide in the presence of a getter material and in an atmosphere which permits the transfer of oxygen atoms from the niobium oxide to the getter material, and for a sufficient time and at a sufficient temperature to form an oxygen reduced niobium oxide. Niobium oxides and/or suboxides are also described as well as capacitors containing anodes made from the niobium oxides and suboxides. Anodes formed from niobium oxide powders using binders and/or lubricants are described as well as methods to form the anodes.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: June 10, 2003
    Assignee: Cabot Corporation
    Inventors: Jonathon L. Kimmel, Ricky W. Kitchell
  • Patent number: 6267936
    Abstract: Solvent extraction of one or more metal ions from an aqueous solution in the presence of hydrocarbon-soluble aminomethylenephosphonic acid derivatives.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: July 31, 2001
    Assignees: BASF Aktiengesellschaft, Instituto National de Engenharia e Tecnologia
    Inventors: Francisco Delmas, Carlos Nogueira, Michael Ehle, Knut Oppenländer
  • Patent number: 6180072
    Abstract: There is provided a process to reclaim metals from catalysts, said process comprising collecting one or more catalyst containing at least one metal sulfide; leaching the catalyst in an atmospheric leach step; separating the leached slurry into a first liquid stream and a first solid; leaching the first solid in a pressure leach process; separating the second leached slurry into a second liquid stream and a second solid; collecting the first and second liquid streams; oxidizing the combined liquid stream; cooling the oxidized liquid stream; adjusting the pH of the oxidized liquid stream; contacting the cooled oxidized liquid stream with an organic solvent containing an extractant; stripping the soluble metal species from the organic phase; adjusting the pH of the aqueous phase to selectively precipitate at least one metal as a metal salt; and separating the metal salt from the aqueous phase.
    Type: Grant
    Filed: May 6, 1999
    Date of Patent: January 30, 2001
    Assignee: Shell Oil Company
    Inventors: Jack Thomas Veal, Kevin Arnold Andersen, Ruth Mary Kowaleski
  • Patent number: 6010676
    Abstract: Highly pure tantalum compounds are made by slurrying hydrated ammonium tantalum oxide or tantalum hydroxide with concentrated sulfuric acid followed by dissolution with concentrated hydrofluoric acid. After diluting the concentrated acidic solution with water, a soluble potassium compound is added to precipitate a highly pure potassium fluorotantalate. Further steps are used to convert the highly pure potassium fluorotantalate into a highly pure tantalum oxide.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: January 4, 2000
    Assignee: Osram Sylvania Inc.
    Inventors: Raj P. Singh, Michael J. Miller
  • Patent number: 5945342
    Abstract: The present invention relates to methods for digesting diphosphonic acid substituted cation exchange resins that have become loaded with actinides, rare earth metals, or heavy metals, in a way that allows for downstream chromatographic analysis of the adsorbed species without damage to or inadequate elution from the downstream chromatographic resins. The methods of the present invention involve contacting the loaded diphosphonic acid resin with concentrated oxidizing acid in a closed vessel, and irradiating this mixture with microwave radiation. This efficiently increases the temperature of the mixture to a level suitable for digestion of the resin without the use of dehydrating acids that can damage downstream analytical resins. In order to ensure more complete digestion, the irradiated mixture can be mixed with hydrogen peroxide or other oxidant, and reirradiated with microwave radiation.
    Type: Grant
    Filed: May 18, 1998
    Date of Patent: August 31, 1999
    Assignee: Westinghouse Savannah River Company
    Inventors: Sherrod L. Maxwell, III, Sheldon T. Nichols
  • Patent number: 5891407
    Abstract: The present invention relates to a process for the production of pure ammonium metallates of the metals W, Mo, V, Cr and Re, wherein alkaline metal salt solutions are adjusted to a pH value in the range from 5 to 9 by reaction with CO.sub.2, these metal salt solutions are passed through an anion exchanger in carbonate form, wherein, in addition to the alkali metal carbonate solution, the metallate form of the ion exchanger is formed, the ion exchanger is then washed until free of alkali and is then eluted by means of aqueous ammonia to form ammonium metallate solutions and the anion exchanger in the OH form, wherein the anion exchanger is converted into the carbonate form by means of CO.sub.2 treatment and is recycled.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: April 6, 1999
    Assignee: H.C. Starck GmbH & Co. KG
    Inventors: Wilfried Gutknecht, Wolfgang Mathy
  • Patent number: 5881358
    Abstract: A composition for extracting a transition metal which comprises as an active ingredient a cyclic phenol sulfide represented by the following formula (1): ##STR1## wherein X represents a hydrogen atom, a hydrocarbon group, an acyl group, a carboxyalkyl group, or a carbamoylalkyl group; Y represents a hydrocarbon group; Z represents a sulfide group, a sulfinyl group, or a sulfonyl group; and n is an integer of 4 to 8; and a method for extracting a transition metal using the composition
    Type: Grant
    Filed: December 24, 1997
    Date of Patent: March 9, 1999
    Assignees: Cosmo Research Institute, Cosmo Oil Co., Ltd.
    Inventors: Sotaro Miyano, Nobuhiko Iki, Fumitaka Narumi, Naoya Morohashi, Hitoshi Kumagai
  • Patent number: 5866750
    Abstract: A method for recovering titanium and vanadium compounds, such as alkoxides, from a liquid hydrocarbon mixture by hydrolyzing the mixture with a base or acid wash having a sufficiently different density so that two liquid phases form, and separating the two liquid phases.
    Type: Grant
    Filed: November 1, 1995
    Date of Patent: February 2, 1999
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Robert Stephen Tomaskovic, Michael Wayne Potter, William Charles Malven
  • Patent number: 5723098
    Abstract: The invention relates to a process for the selective recovery of catalysts used in the production of adipic acid by(a) separating adipic acid from the reaction solution,(b) exposing the resultant reaction solution to a sulfonated ion exchanger, thereby binding iron, copper, and vanadium ions to said sulfonated ion exchanger,(c) separating the ion-exchanger from the reaction solution,(d) washing the separated ion exchanger with nitric acid to obtain an acid eluate, and(e) exposing the acid eluate to an ion exchanger modified with aminophosphonic acid groups, thereby removing the iron ions from the acid eluate.
    Type: Grant
    Filed: September 4, 1996
    Date of Patent: March 3, 1998
    Inventors: Herbert Salzburg, Georg Steinhoff, Heiko Hoffmann, Helmut Kaponig
  • Patent number: 5682593
    Abstract: Use of diethyl dodecylphosphonate (DEDP) for the extraction of acids and metal salts from aqueous solutions.
    Type: Grant
    Filed: October 19, 1995
    Date of Patent: October 28, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christoph Holzner, Hans-Dieter Block, Hans-Heinrich Moretto
  • Patent number: 5478539
    Abstract: Metal values (especially uranium values) are extracted from aqueous solutions of metal oxyions in the absence of halogen ion using an imidazole of defined formula. Especially preferred extractants are 1-alkyl imidazoles and benzimidazoles having from 7 to 25 carbon atoms in the alkyl group.
    Type: Grant
    Filed: March 9, 1995
    Date of Patent: December 26, 1995
    Assignee: Zeneca Limited
    Inventor: Raymond F. Dalton
  • Patent number: 5437848
    Abstract: A process for recovering metal and acid values from a source material containing metallic fluorides comprises digesting the source material in sulfuric acid to form a slurry, separating a fluoride containing solid phase and a metal containing first liquid phase. The solid phase is subjected to pyrohydrolysis, sulfuric and hydrofluoric acids are recovered, and the first liquid phase is processed to recover the metal values by solvent extraction or ion exchanges. The tantalum values are extracted from the first liquid aqueous phase by a water immiscible organic extractant such as methylisobutyl ketone to form a first liquid organic phase containing tantalum and a second liquid aqueous phase. The tantalum is stripped from the first organic phase using water. The process includes the additional steps of heating the separated solid phase from about ambient temperature to an elevated temperature in the presence of water vapor to evolve sulfuric acid and render the gangue chemically inert.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: August 1, 1995
    Assignee: Cabot Corporation
    Inventor: Robert A. Hard
  • Patent number: 5431892
    Abstract: A process for recovering valuable metals from a waste catalyst based on an alumina carrier includes (a) roasting the waste catalyst at a temperature range of 400.degree. to 1,000.degree. C. to obtain a roasted product; (b) preparing a reduction dissolution by dissolving the roasted product with sulfuric acid in the presence of a metal as a dissolution catalyst; (c) separating a large part of the aluminum from the reduction dissolution solution and recovering aluminum as ammonium aluminum sulfate from the solution, optionally after subjecting the reduction dissolution solution to a treatment of removing iron; (d) extracting molybdenum as a molybdate by solvent extraction from the solution after separating and recovering aluminum from the solution; (e) extracting vanadium as a vanadate by solvent extraction from the solution obtained as a residue after extracting molybdenum; and (f) recovering nickel and cobalt each as a hydroxide from the extraction residue after recovering vanadium.
    Type: Grant
    Filed: June 29, 1994
    Date of Patent: July 11, 1995
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Keiji Toyabe, Kenji Kirishima, Haruo Shibayama, Hideo Hanawa
  • Patent number: 5411724
    Abstract: Aluminum can be removed from tetrahedral framework sites of zeolite frameworks and substituted with elements such as silicon, gallium, titanium or zirconium. The process involves three steps:(a) forming a mixture of the ammonium or alkaline metal form of the zeolite in the hydrated state and a crystalline ammonium fluoro-halo-metallate salt;(b) heating the mixture at elevated temperatures to remove the aluminum from the zeolite and to introduce the metal from the salt into the structure of the zeolitic component by solid-state reaction while forming a fluoro-halo-aluminate complex salt; and(c) removing the formed fluoro-halo-aluminate complex salt.
    Type: Grant
    Filed: June 2, 1993
    Date of Patent: May 2, 1995
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Herman K. Beyer, Gabriella Pal-Borbely
  • Patent number: 5330731
    Abstract: A process for selective separation of strontium-82 and strontium-85 from proton irradiated molybdenum targets is provided and includes dissolving the molybdenum target in a hydrogen peroxide solution to form a first ion-containing solution, passing the first ion-containing solution through a first cationic resin whereby ions selected from the group consisting of molybdenum, niobium, technetium, selenium, vanadium, arsenic, germanium, zirconium and rubidium remain in the first ion-containing solution while ions selected from the group consisting of rubidium, zinc, beryllium, cobalt, iron, manganese, chromium, strontium, yttrium and zirconium are selectively adsorbed by the first resin, contacting the first resin with an acid solution capable of stripping adsorbed ions from the first cationic exchange resin whereby the adsorbed ions are removed from the first resin to form a second ion-containing solution, evaporating the second ion-containing solution for time sufficient to remove substantially all of the acid
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: July 19, 1994
    Assignee: The United States of America as represented by the Untied States Department of Energy
    Inventors: Richard C. Heaton, David J. Jamriska, Sr., Wayne A. Taylor
  • Patent number: 5296203
    Abstract: A process for selective separation of niobium from proton irradiated molybdenum targets is provided and includes dissolving the molybdenum target in a hydrogen peroxide solution to form a first ion-containing solution, contacting the first ion-containing solution with a cationic resin whereby ions selected form the group consisting of molybdenum, biobium, technetium, selenium, vanadium, arsenic, germanium, zirconium and rubidium remain in a second ion-containing solution while ions selected from the group consisting of rubidium, zinc, beryllium, cobalt, iron, manganese, chromium, strontium, yttrium and zirconium are selectively adsorbed by the cationic resin; adjusting the pH of the second ion-containing solution to within a range of from about 5.0 to about 6.0; contacting the pH adjusting second ion-containing solution with a dextran-based material for a time to selectively separate niobium from the solution and recovering the niobium from the dextran-based material.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: March 22, 1994
    Assignee: The United States of America as represented by United States Department of Energy
    Inventors: Dennis R. Phillips, David J. Jamriska, Sr., Virginia T. Hamilton
  • Patent number: 5271910
    Abstract: A process of treating metal chloride wastes produced by chlorination of titanium ore comprises the steps of:(a) leaching said metal chloride wastes in a hydrochloric acid (HCl)-containing solution to obtain a solution containing solids and dissolved metals,(b) separating said dissolved metals from said solids present in the solution obtained in step (a) to obtain a liquid and a residue,(c) selectively precipitating the metals as their hydroxides by adding a neutralizing agent to the liquid obtained in step (b),(d) separating the precipitate of metal hydroxides obtained in step (c) from the liquid to obtain a residue, and(e) dewatering the residue obtained in step (d).
    Type: Grant
    Filed: March 13, 1990
    Date of Patent: December 21, 1993
    Assignee: Shell Internationale Research Maatschappij B.V.
    Inventors: Andries P. van der Meer, Gerrit van der Lee
  • Patent number: 5260039
    Abstract: A process is disclosed for the two-phase extraction of metal ions from phases containing solid metal oxides, which is characterized in that the solid metal oxides are brought into contact with a hydroxamic acid, known per se, dissolved in a hydrophobic organic solvent, the phases containing the solid metal oxides and the organic phase are intensively intermixed over a sufficient contact time, after phase-splitting, the organic phase is separated and the metal ions are re-extracted from the organic phase in a manner known per se and processed.The extracting agent used therein and the use of this extracting agent are also disclosed.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: November 9, 1993
    Assignee: Hendel Kommanditgesellschaft auf Aktien
    Inventors: Werner Schwab, Ralf Kehl
  • Patent number: RE36118
    Abstract: A method for the recovery of a metal from an organic complex thereof, said method comprising treating the complex with a weakly acid aqueous solution of an alkali metal or alkaline earth metal chloride having a chloride content of at least 4 molar whereby said complex is decomposed and metal ions are transferred to the aqueous solution.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: March 2, 1999
    Assignee: Zeneca Limited
    Inventors: Domenico C. Cupertino, Peter A. Tasker
  • Patent number: RE36990
    Abstract: A method for the recovery of a metal from an organic complex thereof, said method comprising treating the complex with a weakly acid aqueous solution of an alkali metal, an alkaline earth metal or ammonium chloride having a chloride content of at least 4 molar whereby said complex is decomposed and metal ions are transferred to the aqueous solution.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: December 19, 2000
    Assignee: Zeneca Limited
    Inventors: Domenico C. Cupertino, Peter A. Tasker