Ion Exchange; Chelation Or Liquid/liquid Ion Extraction Patents (Class 423/DIG14)
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Patent number: 4237062Abstract: Certain sulfonylthiosemicarbazides, metal complexes thereof and solutions of said compounds in essentially water-immiscible, liquid hydrocarbon solvents are disclosed. The sulfonylthiosemicarbazides have the general structural formula: ##STR1## wherein R and R.sup.1 are as defined in the specification and claims hereof. Particular metal values are recovered from their aqueous solutions by using sulfonylthiosemicarbazides dissolved in essentially water-immiscible, liquid hydrocarbon solvents. The extraction process involves contacting the metal value containing aqueous solution with the solution of the sulfonylthiosemicarbazide in essentially water-immiscible, liquid hydrocarbon solvent and stripping the metal from the loaded organic phase.Type: GrantFiled: May 21, 1979Date of Patent: December 2, 1980Assignee: Henkel CorporationInventor: Ernest B. Spitzner
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Patent number: 4234546Abstract: A process is described for the selective recovery of nickel values from an aqueous solution containing nickel values by means of liquid/liquid extraction, wherein the aqueous solution is contacted with an organic extractant comprising a substantially water-immisicible organic solvent and one or more of certain alpha,beta-dioxime compounds. Novel alpha, beta-dioxime compounds for use in the extraction process are also described.Type: GrantFiled: March 1, 1979Date of Patent: November 18, 1980Assignee: Shell Oil CompanyInventors: Abraham J. van der Zeeuw, Peter Koenders, Riekert Kok
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Patent number: 4222892Abstract: A process is, herein, disclosed for preparing oxine impregnated-activated charcoal comprising contacting solid oxine with activated charcoal.Type: GrantFiled: July 18, 1978Date of Patent: September 16, 1980Assignee: Japan Atomic Energy Research InstituteInventors: Kenji Motojima, Enzo Tachikawa, Hideo Kamiyama
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Patent number: 4210502Abstract: This invention relates to a process for recovery of waste H.sub.2 SO.sub.4 and HCl which are used for pickling metallic materials and articles and contain a large quantities of Fe ions. Furthermore, it offers a process for the recovery of H.sub.2 SO.sub.4 and HCl from waste H.sub.2 SO.sub.4 which contains large amounts of Fe ions after removal of Ti ions by a hydrolysis process in the production of TiO.sub.2 and also for the recovery of high-purity electrolytic iron or iron hydroxide.Type: GrantFiled: March 14, 1979Date of Patent: July 1, 1980Assignee: Solex Research Corporation of JapanInventors: Morio Watanabe, Sanji Nishimura
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Patent number: 4203964Abstract: The invention relates to the re-extraction of a metal from an organic extraction solution in which the metal is present as a metal chloride complex bonded to an extractant. The organic extraction solution is contacted with an aqueous solution, to transfer metal ions and chloride ions to the aqueous solution. Sulphuric acid is added to the aqueous solution, which is subsequently heated to drive off hydrogen chloride and water. Metal sulphate is removed from the acidified aqueous solution.Type: GrantFiled: July 3, 1978Date of Patent: May 20, 1980Assignee: MX-Processer Reinhardt & Co. ABInventors: Hans Reinhardt, Ulf V. Kuylenstierna
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Patent number: 4201747Abstract: Yttrium ions are selectively separated by extracting the yttrium ions by contacting an aqueous solution containing hydroxyethyl ethylenediaminetriacetic acid, yttrium ions and lanthanide ions with an extracting solvent containing tributyl phosphate and an acid phosphoric ester having the formula ##STR1## wherein R.sup.1 represents hydrogen atom or an alkyl group having the formula ##STR2## wherein n is an integer of 6 to 15 and m is n-1 or n-2; and R.sup.2 represents an alkyl group having the formula ##STR3## wherein n is an integer of 6 to 15 and m is n-1 or n-2.Type: GrantFiled: October 6, 1978Date of Patent: May 6, 1980Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Yukinori Minagawa, Tsugio Kaneko, Kunihiko Yamaguchi
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Patent number: 4200504Abstract: Process for extraction and separation of metals utilizing the advantages of liquid-liquid extraction with cation exchangers without requiring the equivalent addition of alkali. The process is based on a combination of leaching the metal-containing raw materials with an organic acid (cation exchanger) and a subsequent use of the formed metal cationic complex in a liquid-liquid extraction process. In the said extraction process, the organic solution of metal complexes is used to recover and separate metal ions from an aqueous solution of metal salts.Type: GrantFiled: February 14, 1977Date of Patent: April 29, 1980Inventor: Gunnar Thorsen
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Patent number: 4193968Abstract: The invention provides a process for recovering gallium from calcined clay leached with hydrochloric acid. The leach solution containing aluminum, ferric and gallium chlorides is treated by ion exchange to first remove aluminum ions, following which the solution containing ferric and gallium chlorides is treated to reduce the ferric ions to ferrous ions. The reduced solution is acidified with hydrochloric acid sufficiently to insure that the gallium is present in the form GaCl.sub.4 - ions, and is then again treated by ion exchange to separate the ferrous ions from the gallium for ultimate recovery of the latter.Type: GrantFiled: October 3, 1978Date of Patent: March 18, 1980Assignee: The Anaconda CompanyInventors: Robert E. Sullivan, William R. Stern, Bess L. Vance
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Patent number: 4186174Abstract: A process and apparatus for obtaining a more concentrated solution of components such as chromium containing anions by the use of ion exchange beds. A solution containing the component to be concentrated is passed through a first bed in which the component is taken up. A second solution containing a component of opposite charge from the first component is passed through the first bed to take up the component from the first bed and then through a second bed capable of taking up the second component from the solution. The second solution is passed from the first bed directly to and through the second bed, and both beds are rinsed following passage of the second solution therethrough by passing a rinse solution through the second bed and then directly to and through the first bed in a direction opposite to the direction in which said second solution passed through the beds.Type: GrantFiled: September 13, 1977Date of Patent: January 29, 1980Assignee: Eco Tec LimitedInventors: Robert F. Hunter, Irving H. Spinner
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Patent number: 4177119Abstract: This invention relates to a process for recovery of waste H.sub.2 SO.sub.4 and HCl which are used for pickling metallic materials and articles and contain a large quantities of Fe ions. Furthermore, it offers a process for the recovery of H.sub.2 SO.sub.4 and HCl from waste H.sub.2 SO.sub.4 which contains large amounts of Fe ions after removal of Ti ions by a hydrolysis process in the production of TiO.sub.2 and also for the recovery of high-purity electrolytic iron or iron hydroxide.Type: GrantFiled: August 24, 1978Date of Patent: December 4, 1979Assignee: Solex Research CorporationInventors: Morio Watanabe, Sanji Nishimura
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Patent number: 4175109Abstract: A tungsten extraction process wherein tungsten values are extracted from an aqueous alkali metal tungstate solution by an organic extractant, then stripped from the extractant is improved by using an organic solution consisting essentially of from about 6 to about 10 percent by volume an extractant that is a mixture of trialkyl amines wherein the major constituent is tri-isooctyl amine and from about 90 to about 94 percent by volume of a solvent that is a mixture of alkyl benzenes having molecular weights of either 120, 134 or 148.Type: GrantFiled: August 3, 1978Date of Patent: November 20, 1979Assignee: GTE Sylvania IncorporatedInventor: Tai K. Kim
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Patent number: 4173616Abstract: A process is described for the recovery of copper values from an acidic aqueous solution containing copper values by means of liquid-liquid extraction, wherein the extractant is a mixture comprising a substantially water-immiscible organic solvent, one or more hydroxyoximes capable of extracting copper values, and one or more alpha, betadioximes of the anti-configuration. Novel alpha, beta-dioxime compounds are also disclosed.Type: GrantFiled: March 7, 1978Date of Patent: November 6, 1979Assignee: Shell Oil CompanyInventors: Peter Koenders, Abraham J. Van der Zeeuw, Riekert Kok
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Patent number: 4169130Abstract: Gallium values are recovered from highly basic aqueous solutions thereof, especially from sodium/aluminum liquors of Bayer process origin, by liquid/liquid extraction with a water immiscible organic phase comprising an organic solvent and a dissolved, water-insoluble substituted hydroxyquinoline, said recovery being characterized in that at least the step of extracting the gallium values is conducted under an inert atmosphere.Type: GrantFiled: July 11, 1978Date of Patent: September 25, 1979Assignee: Rhone-Poulenc IndustriesInventors: Jacques Helgorsky, Alain Leveque
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Patent number: 4164545Abstract: A system for treating waste gas in which the waste gas is contacted with an absorbent which contains manganese dioxide; thereafter contacting the absorbent with water to solubilize salts of manganese with an acidic ion exchange resin that retains manganese and passes acids formed from manganese salts; contacting the ion exchange resin and contained manganese with dilute nitric acid to obtain Mn(NO.sub.3).sub.2 solution; and precipitating MnO.sub.2 from the Mn(NO.sub.3).sub.2 solution.Type: GrantFiled: October 3, 1978Date of Patent: August 14, 1979Assignee: Phillips Petroleum CompanyInventor: Richard L. Scott
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Patent number: 4161439Abstract: Flow paths for liquids are disclosed in vessels, the paths oriented with electrodes which are electrically energized to establish electrostatic fields through the paths. One of the liquids is more polar than the other liquids in the paths. One of the fields is intense enough to generate the force to move drops of the polar liquid fast enough to shear the drops to smaller sizes and disperse the smaller drops. A second one of the fields is intense enough to generate the force to move the dispersed drops into coalescense. Various spacing and means of energizing the electrodes are disclosed to place the forces on the liquids in sequence and at different intensities.Type: GrantFiled: April 3, 1978Date of Patent: July 17, 1979Assignee: Combustion Engineering, Inc.Inventors: Kenneth W. Warren, Floyd L. Prestridge
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Patent number: 4150092Abstract: The present invention provides a method for recovering vanadium from ferruginous chloride solutions by liquid-liquid extraction (or liquid ion exchange). Such chloride solutions are obtained in the extraction of vanadium from vanadiferous residues arising from the chlorination of titaniferous ores and in the extraction of vanadium from vanadiferous minerals. These solutions contain chlorides of vanadium, aluminum, iron, manganese and chromium. The method comprises adding sulfate ions to the chloride solution and recovering the vanadium by liquid-liquid extraction. By adjusting the sulfate-additive in relation to the concentrations of vanadium, iron and chloride in the solution vanadium can be exhausted substantially free from iron.Type: GrantFiled: October 21, 1977Date of Patent: April 17, 1979Assignee: Engelhard Minerals & Chemicals CorporationInventor: Frank Pitts
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Patent number: 4142952Abstract: A process for extracting metal values from aqueous solutions of metal salts which comprises the steps of contacting the aqueous solution with a solution in a water-immiscible organic solvent of one or more o-hydroxyaryloximes containing at least 3 aliphatic or alicyclic carbon atoms and which are strong metal extractants and one or more alkylphenols optionally containing one chlorine atom or one cyano group, separating from the aqueous phase the solvent phase containing metal in the form of a complex with the o-hydroxyaryloxime contacting the solvent phase with an aqueous mineral acid, and separating the solvent phase from the aqueous phase containing metal in the form of a salt with the mineral acid.Type: GrantFiled: January 3, 1977Date of Patent: March 6, 1979Assignee: Imperial Chemical Industries LimitedInventor: Raymond F. Dalton
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Patent number: 4139594Abstract: Trivalent thallium values are extractively recovered from aqueous media containing dissolved trivalent and monovalent thallium values by contacting the aqueous medium in the presence of an alkanoic acid, having from 2 to 4 carbon atoms per molecule and having a molecular weight of at least 74 grams per gram-mol of acid, with an inert, organic, non-acidic solvent for the alkanoic acid, said solvent having limited solubility in water, to preferentially extract at least a portion of the dissolved trivalent thallium values into the organic solvent extractant and recovering an extract comprising the organic solvent containing the extracted trivalent thallium values.Type: GrantFiled: April 14, 1978Date of Patent: February 13, 1979Assignee: Halcon Research & Development Corp.Inventor: Nabil M. Rizkalla
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Patent number: 4137290Abstract: Heavy metal ions are recovered from a dilute aqueous solution by flowing the solution through either a single bed of ion-absorbing material in successive forward and reverse directions, or through a first bed of ion-absorbing material and thereafter through a second bed of ion-absorbing material in the reverse direction of flow. The reversal of flow is to periodically mechanically agitate a bed of ion-absorbing material to dislodge contaminants, such as gelatin.The method is accomplished by using one enclosed vessel, or a pair of enclosed vessels, that have valves to control the direction of flow. A timing device preferably automatically reverses the direction of flow about each hour.After a relatively large number of reversals of flow the heavy metal ions are recovered from the ion-absorbing material and the same is regenerated in the process to again absorb ions from the dilute aqueous solution.Type: GrantFiled: February 1, 1977Date of Patent: January 30, 1979Assignee: De luxe General, IncorporatedInventors: David J. Degenkolb, Fred J. Scobey
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Patent number: 4126663Abstract: A process for the recovery of vanadium from acid sulfate solutions such as those derived by sulfuric acid leaching of industrial residues such as spent hydrodesulfurization catalysts, fly ash and furnace bottom ash in which magnesium oxide, hydroxide or carbonate is used as the neutralizing agent.Type: GrantFiled: October 17, 1977Date of Patent: November 21, 1978Assignee: Engelhard Minerals & Chemicals CorporationInventor: Frank Pitts
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Patent number: 4123435Abstract: Nitro-substituted 2-(2-hydroxyphenyl)benzoxazoles of the formula ##STR1## wherein one of R.sup.3 and R.sup.4 is --NO.sub.2 and the other is --H, --NO.sub.2 or alkyl of 1 to 20 carbons and R.sup.1 and R.sup.2 independently are --H or alkyl of 1 to 20 carbons, with the proviso that R.sup.1, R.sup.2, R.sup.3 and R.sup.4 contain a total of at least 7 carbons, are acidic, oil soluble compounds having utility for extraction of copper from strongly acidic ore leaches. Excellent selectivity for copper over iron is exhibited by the subject compounds.Type: GrantFiled: August 25, 1977Date of Patent: October 31, 1978Assignee: The Dow Chemical CompanyInventors: Robert R. Grinstead, Kenneth C. Jones, Wilmonte A. Nasutavicus
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Patent number: 4120862Abstract: The combination of a copper halide catalyst certain peroxidic compounds has been found advantageous for the oxidation of Schiff bases of the formula ##STR1## to the corresponding benzoxazoles ##STR2## wherein one of R.sup.3 and R.sup.4 is --NO.sub.2 and the other is --H, alkyl of 1 to 20 carbons, or --NO.sub.2 ; and R.sup.1 and R.sup.2 are independently --H or alkyl of 1 to 20 carbons, with the proviso that R.sup.1, R.sup.2, R.sup.3 and R.sup.4 contain a total of 6 carbons. Benzoxazoles of the latter type have utility as organo-soluble, metallurgical extractants.Type: GrantFiled: August 25, 1977Date of Patent: October 17, 1978Assignee: The Dow Chemical CompanyInventor: Donald N. Brattesani
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Patent number: 4113588Abstract: This invention relates to a process for recovery of waste H.sub.2 SO.sub.4 and HCl which are used for pickling metallic materials and articles and contain a large quantities of Fe ions. Furthermore, it offers a process for the recovery of H.sub.2 SO.sub.4 and HCl from waste H.sub.2 SO.sub.4 which contains large amounts of Fe ions after removal of Ti ions by a hydrolysis process in the production of TiO.sub.2 and also for the recovery of high-purity electrolytic iron or iron hydroxide.Type: GrantFiled: March 2, 1977Date of Patent: September 12, 1978Assignee: Solex Research Corporation of JapanInventors: Morio Watanabe, Sanji Nishimura
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Patent number: 4104359Abstract: An organic liquid extractant of at least one oxime, selected from the group consisting of ketoximes and .alpha.-hydroxyoximes dissolved in an organic solvent, useful in separating nickel from cobalt in process solutions or in recovering both nickel and cobalt from process solutions, is treated with a salt of hydroxylamine at intervals to maintain the activity of the oxime in the extractant. The organic extractant can also contain sulfonic acids to facilitate treatment of more acid process solutions and is treated with a hydroxylamine salt to regenerate oxime degraded by the highly acid process solutions, the extractant itself and the concentrated acidic stripping solutions.Type: GrantFiled: February 28, 1977Date of Patent: August 1, 1978Assignee: Amax Inc.Inventors: Phillip K. Davis, Helen S. Leaver, Henry Freiser
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Patent number: 4089867Abstract: Diacylfurazan oxides are prepared by catalytic dimerization of alpha-nitroketones.Type: GrantFiled: November 11, 1976Date of Patent: May 16, 1978Assignee: Texaco Inc.Inventors: Roger G. Duranleau, John M. Larkin, Stanley R. Newman
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Patent number: 4080418Abstract: Cobalt, copper and nickel values are separated from ammoniacal aqueous solutions by contacting the solutions with a chelate exchange resin of polymerized ar-vinylbenzylamino dicarboxylic acids whereby the cobalt, copper and nickel values are loaded on the chelate exchange resin, stripping the cobalt, copper and nickel values from the loaded chelate exchange resin by contacting the loaded resin with a mineral acid and restoring the capacity of the chelate exchange resin when it falls below a predetermined value by reacting the degraded chelate exchange resin with an aqueous solution of a halo salt of a carboxylic acid, the aqueous solution being maintained at a pH value greater than about 8.Type: GrantFiled: February 22, 1977Date of Patent: March 21, 1978Assignee: Amax Inc.Inventor: John R. Carlberg
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Patent number: 4065455Abstract: Compounds of the structure ##STR1## where X is Cl or Br, R is a branched chain alkyl or alkenylradical containing about 8 to 20 carbon atoms and R.sub.1, R.sub.2 and R.sub.3 are hydrogen or alkyl groups of 1 to 4 carbon atoms. The new compounds find use in extraction of metals.Type: GrantFiled: March 4, 1974Date of Patent: December 27, 1977Assignee: General Mills Chemicals, Inc.Inventor: Phillip L. Mattison
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Patent number: 4041126Abstract: A process for the separation and selective recovery of platinum and palladium values from an acidic aqueous medium which comprises contacting the medium with a mixed organic extraction reagent comprising a water immiscible organic solvent having dissolved therein an organically substituted secondary amine compound capable of forming complexes of platinum and palladium that are preferentially soluble in the organic solvent and whereby the contacting results in creation of an organic extract phase and an aqueous raffinate phase. After phase separation, palladium is selectively recovered by contacting the organic phase with an aqueous solution of an acidified reducing agent. Platinum is separately recovered by contacting the organic phase with an aqueous alkaline solution. The process may be employed as a method for concentrating solutions of platinum or palladium.Type: GrantFiled: December 18, 1975Date of Patent: August 9, 1977Assignee: PGP Industries, Inc.Inventors: John Baltz, Enzo Coltrinari