Group Iva Metal (ge, Sn, Or Pb) Patents (Class 423/89)
-
Patent number: 5202470Abstract: The invention provides a compound of the formula[NH.sub.2 NH.sub.2 ].sub.a [C.sub.6 H.sub.3 (COOH) (SO.sub.3 H) (OH)].sub.bwhereina is 1 andb is from 1 to 2.The compound is useful for stabilizing tin (II) compounds against oxidation, in particular in the electrolytic coloring of aluminium or aluminium alloys.Type: GrantFiled: November 19, 1990Date of Patent: April 13, 1993Inventor: Erich Ruf
-
Patent number: 5190735Abstract: A process for selective separation of germanium-68 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 from the group consisting of molybdenum, niobium, 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 first resin, adjusting the pH of the second ion-containing solution to within a range of from about 0.7 to about 3.Type: GrantFiled: March 30, 1992Date of Patent: March 2, 1993Assignee: The United States of America as represented by the United States Department of EnergyInventors: Dennis R. Phillips, David J. Jamriska, Sr., Virginia T. Hamilton
-
Patent number: 5127963Abstract: A novel chemical extraction/washing process is described for detoxifying lead contaminated materials, and in particular, for detoxifying broken lead/acid storage battery casings made from ebonite. In particular, the preferred process of the invention enables the lead content of broken ebonite battery casing material to be reduced to the point that the processed ebonite is no longer a potential harzardous waste by any EPA definition. In the preferred embodiment, the novel process of the invention makes use of the chemical leaching capabilities of nitric acid, and the water solubility of lead nitrates, to dissolve and then wash away the combined lead compounds that contaminate and render hazardous broken ebonite battyer casing material, leaving a clean and usable ebonite product for recycling.Type: GrantFiled: March 21, 1991Date of Patent: July 7, 1992Assignee: Rubber Recycling, Inc.Inventors: George R. Hartup, Jack E. Leonard
-
Patent number: 5038046Abstract: A method and generator for preparing the radioisotope of lead, .sup.212 Pb, whereby .sup.228 Th, in a closed chamber, is allowed to decay to gaseous .sup.220 Rn which is then readily separated from the thorium and other decay products by diffusing the .sup.220 Rn gas into a second chamber, where it decays to .sup.212 Pb which can then be collected from the second chamber. The .sup.228 Th preferably is amorphous, such as thorium stearate. Collection of .sup.212 Pb occurs in a medium of high and open porosity into which the .sup.220 Rn diffuses so that the decay products recoil into the medium. The .sup.212 Pb can be recovered from this medium by dissolving the medium or by reacting it with an antibody-chelating complex solution to entrap it in the antibody-chelating complex.Type: GrantFiled: July 10, 1990Date of Patent: August 6, 1991Assignee: BiotechneticsInventors: John H. Norman, Wolfgang A. Wrasidlo, Karol J. Mysels
-
Patent number: 4942023Abstract: A process using an extractant, that consists on the one hand of an active component being substituted 8-hydroxyquinoline and on the other hand of by-products of the manufacture of said extractant, said process being characterized in that the extractant contains at least 90 wt % of the active component.Type: GrantFiled: December 21, 1988Date of Patent: July 17, 1990Assignee: Metallurgie Hoboken-OverpeltInventors: Achille J. De Schepper, Guy G. Haesebroek, Antoine L. Van Peteghem
-
Patent number: 4937148Abstract: Transparent conductive coatings excellent in transparency are provided on substrates such as glass, plastics, etc. by the use of conductive coating materials obtained by maintaining aqueous solutions of hydrolyzable tin containing or indium containing compounds at pH of 8-12, and gradually hydrolyzing said compounds in the solutions to form sols containing colloidal particles, followed by drying and calcining.Type: GrantFiled: May 1, 1989Date of Patent: June 26, 1990Assignee: Catalysts & Chemicals Industries Co., Ltd.Inventors: Goro Sato, Michio Komatsu, Tsuguo Koyanagi, Masayuki Matsuda, Hiroo Yoshidome, Akira Nakashima, Kazuaki Inoue
-
Patent number: 4915919Abstract: An improved method for selectively rcovering Ge from acidic solution containing Ge and typically Zn, As, Cd, Sb, In, Cu and Fe (II) by multistage, countercurrent liquid-liquid extraction is described. The extractant used in the organic phase is an oxime, for example, 5,8-diethyl-7-hydroxy-6-dodecanone oxime, mixed with at least one alkylphosphoric acid, for example either di-2-ethylhexyl phosphate alone or admixed with mono-2-ethylhexyl phosphate, dissolved in a hydrocarbon diluent. This mixed system shows better efficiency and selectivity for germanium than known systems using either oximes or alkylphosphoric acids separately.Type: GrantFiled: August 29, 1988Date of Patent: April 10, 1990Assignee: Cominco Ltd.Inventors: Daniel A. D. Boateng, David A. Neudorf, Victor N. Saleh
-
Patent number: 4895905Abstract: Improved processes for the removal from solution of multi-valent alkaline earth metal and/or heavy metal cations are taught, having excellent combinations of cation capacity and resistance to bead breakage. The processes use specified polymer resin beads functionalized with chelating functionalities such as alkylaminophosphonic moieties or iminodiacetic acid moieties. The beads are prepared by the specified process to have a decreased amount of cross-linking in the shell area as compared to the core. An additional aspect of the invention is an improved gel-type chelating resin having core/shell morphology and alkylaminophosphonic functional groups which is found to exhibit surprising combinations of dynamic capacity, osmotic shock resistance, and physical strength. This chelating resin has been found to be very suitable for the removal of calcium from brine solutions prior to the use of such solutions in membrane electrolysis cells of chlorine production.Type: GrantFiled: February 8, 1988Date of Patent: January 23, 1990Assignee: The Dow Chemical CompanyInventors: Hans P. Schneider, Ulrich Wallbaum
-
Patent number: 4886648Abstract: Process for the recovery of germanium from solutions that contain it, in particular from solutions diluted by the addition of tartaric acid and extraction with an organic solution of a tertiary amine. In the reextraction with sodium hydroxide there is obtained a concentrate of germanium.Type: GrantFiled: June 29, 1988Date of Patent: December 12, 1989Assignee: Asturiana De Zinc, S.A.Inventors: Francisco J. S. Menendez, Fernando M. S. Menendez, Antonio De La Cuadra Herrera, Francisco A. Tamargo, Luis P. Lorenzo, Matias R. Valcarcel, Vicente A. Fernandez
-
Patent number: 4873352Abstract: By reacting a tin carboxylate with hydrogen peroxide at a particular ratio in an aqueous medium, this invention provides a transparent aqueous tin compound solution which can finally form, in an industrially advantageous manner, tin oxide having excellent transparency, uniformity, compactness, conductivity, etc.Type: GrantFiled: February 4, 1987Date of Patent: October 10, 1989Assignee: Japan Exlan Company LimitedInventors: Toshiyuki Kobashi, Hideo Naka
-
Patent number: 4822759Abstract: A method is provided of producing a self-supporting ceramic composite structure having one or more encasement members, such as an encasing steel sleeve, joined to it by growth of the ceramic material to engagement surface(s) of the encasement member(s). A parent metal is contacted with a body of filler which is encased by the encasement member(s). The resulting assembly is heated to melt and oxidize the parent metal, e.g., aluminum, to form a polycrystalline material comprising an oxidation reaction product which grows through the doby of filler and stops at the engagement surface(s) of the encasement member(s) which thereby determines the surface geometry of the grown ceramic matrix. Upon cooling, the encasement member(s) is shrink-fitted about the ceramic composite body. The invention also provides the resultant articles, for example, a ceramic composite body having a stainless steel member affixed thereto.Type: GrantFiled: June 24, 1988Date of Patent: April 18, 1989Assignee: Lanxide Technology Company, LPInventors: Marc S. Newkirk, H. Daniel Lesher
-
Patent number: 4797264Abstract: Chelating agents on which metals such as uranium have been adsorbed are brought into contact with an eluent of aqueous solution containing reducing agents and basic compounds, until the metals are eluted. The elution is effected with large speed without degradation of the chelating agents. Preferred chelating agents are rather stable under basic conditions but not under acidic conditions, for example, those having .dbd.NOH group in their molecules. The reducing agents and basic compounds in the eluent are, for example, sulfurous acid or salts thereof and sodium hydroxide, respectively.Type: GrantFiled: May 27, 1986Date of Patent: January 10, 1989Assignee: Sumitomo Chemical Company, LimitedInventors: Yasuhiko Inoue, Masaaki Matsuda, Yoshirou Akiyoshi
-
Patent number: 4793852Abstract: This invention relates to a method of recovering non-ferrous metal sulfides from a metal ore which comprises subjecting the metal ore, in the form of an aqueous pulp, to a froth flotation process in the presence of a flotating amount of a flotation collector wherein the collector comprises a compound which corresponds to one of the formulas ##STR1## wherein R.sup.1 is alkyl, aryl or aralkyl group wherein the aryl and aralkyl can be substituted with a halo or alkyl moiety;R.sup.2 is alkyl, aryl or aralkyl group wherein the aryl or aralkyl can be substituted with a halo or alkyl moiety;R.sup.3 is aryl or aralkyl unsubstituted or substituted with a halo or alkyl moiety;R.sup.4 is alkyl, aryl or aralkyl group wherein the aryl or aralkyl can be substituted with a halo or alkyl moiety; with the proviso that at least one of R.sup.1 and R.sup.2 must be aryl or aralkyl unsubstituted or substituted;under conditions such that the metal sulfide values are recovered in the froth.Type: GrantFiled: October 28, 1985Date of Patent: December 27, 1988Assignee: The Dow Chemical CompanyInventors: Guy H. Harris, Patrice K. Ackerman, Frank F. Aplan
-
Patent number: 4777023Abstract: A method for preparing a hydride containing at least two different Group 4A atoms wherein at least one of the Group 4A atoms is silicon or germanium. The method includes the steps of reacting an alkali metal and a macrocyclic compound with a silicon or germanium hydride to form a salt. The salt is then reacted with a Group 4A halide. The resulting hydrides are useful as deposition feedstock material for use in the formation of hydrogenated amorphous silicon alloy in the fabrication of photovoltaic devices and other semiconductor devices.Type: GrantFiled: February 18, 1986Date of Patent: October 11, 1988Assignee: Solarex CorporationInventor: Benjamin F. Fieselmann
-
Patent number: 4741893Abstract: Process for producing fluorides of Mo, W, Nb, Ta, V, Re, Ti, Zr, Hf, Co, Ni, Cr, Sb, Sn, Zn, Pb, Al and rare earth metals comprising heating fluorine-containing ammonium salts of corresponding metals in a stream of an inert or reducing gas to convert them into fluorides of the metals.Type: GrantFiled: June 9, 1986Date of Patent: May 3, 1988Assignee: Solex Research Corporation of JapanInventors: Morio Watanabe, Sanji Nishimura
-
Patent number: 4670160Abstract: A metal scavenger is composed of an addition product of a polyamine and an epihalohydrin. The addition product contains as substituent or substituents at least one carbodithio group and/or at least one carbodithioate salt group introduced therein by substituting the corresponding number of active hydrogen atom or atoms in the addition product. Metals can be scavenged from waste water by adding the metal scavenger together with at least one of sodium monosulfide, sodium polysulfides and sodium hydrogensulfide.Type: GrantFiled: September 11, 1986Date of Patent: June 2, 1987Assignee: Miyoshi Yushi Kabushiki KaishaInventors: Masafumi Moriya, Kazuo Hosoda, Akira Nishimura, Takao Imachi
-
Patent number: 4666686Abstract: A process for the fluid-fluid extraction of gallium, germanium or indium from acid or base hydrous solutions, in which a mixture of at least two hydroxyquinolines in various quantities is employed, is described.Type: GrantFiled: March 7, 1986Date of Patent: May 19, 1987Assignee: Preussag Aktiengesellschaft MetallInventors: Wolfang Krajewski, Kunibert Hanusch
-
Patent number: 4656013Abstract: There is disclosed a process for producing germanes by reducing germanium halide with a mixture of alkylaluminum hydride and trialkylaluminum, in which a treatment for reducing the content of trialkylaluminum in the mixture to 10 mol. % or less relative to the alkylaluminum hydride is carried out prior to the reduction reaction. As to the treatment for reducing the content of trialkylaluminum in the mixture, there are provided, for example, distillation, recrystallization, complex formation followed by separation, pyrolysis and decomposition by hydrogenation and addition of alkylaluminum halide to said mixture.Type: GrantFiled: October 11, 1985Date of Patent: April 7, 1987Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Athuhiko Hiai, Kazuo Wakimura, Masao Tanaka
-
Patent number: 4601889Abstract: A process for the recovery of a heavy metal which comprises:bringing a polymer having pendant groups of the formula:--CO--NH--NH--CO--COOMin which M is hydrogen, sodium or potassium, into contact with an aqueous solution containing a heavy metal to have the heavy metal adsorbed by said polymer;andhaving said heavy metal desorbed from the said polymer.Type: GrantFiled: October 31, 1983Date of Patent: July 22, 1986Assignee: UBE Industries, Ltd.Inventors: Nagayoshi Sakamoto, Junichi Kugimoto
-
Patent number: 4587106Abstract: Liquid-liquid extraction of a substance from an aqueous solution thereof, which consists in preparing a microemulsion of this solution with a hydrophobic liquid in such a way that the layer of microemulsion is accompanied by a layer of consumed aqueous solution and a layer of hydrophobic liquid containing the substance to be extracted.Type: GrantFiled: December 23, 1982Date of Patent: May 6, 1986Assignee: Societe Nationale Elf AquitaineInventors: Denise Bauer, Jacques Komornicki, Jacques Tellier
-
Patent number: 4576812Abstract: This invention relates to a process for making the chloride of a metal from the sulfide of said metal in the absence of air and for a metal selected from copper, iron, lead, zinc, silver and gold. The process consists of three broad steps. First, forming an intimate mixture of finely divided sulfides of the metals with finely divided chlorides, the latter being in an anhydrous state. Second, heating the mixture to a temperature at which there is a rapid reaction converting the metal sulfides to chlorides and elemental sulfur in the state of a solid aggregate mixture. Third, recovering the formed metal chlorides from the aggregate mixture by conventional means.Type: GrantFiled: June 12, 1984Date of Patent: March 18, 1986Inventor: Hardwin E. A. von Hahn
-
Patent number: 4571328Abstract: A coating comprising elemental silicon is electrodeposited on a substrate from an aqueous medium. The plating bath is a solution of what is described as one or more metal hydrides. The metal hydrides of the present invention are provided by combining stoichiometric amounts of metal, alkaline metal hydroxide and water in a preselected proportion by mole percent. The particular proportion is a function of the particular metal. A hydride concentrate is provided which is used in aqueous solution to provide a plating bath.Type: GrantFiled: April 15, 1985Date of Patent: February 18, 1986Assignee: Teknico Industries, Inc.Inventor: G. Kenneth Rice
-
Patent number: 4568526Abstract: A process for selective liquid-liquid extraction of germanium from an aqueous acidic liquor containing, besides germanium, at least one other metal selected from the group which comprises cadmium, zinc, cobalt, iron, arsenic and nickel. This process includes extracting germanium from said aqueous liquor by contacting said liquor with an organic medium containing a diluent and an extractant, said diluent being immiscible with said aqueous liquor. The major part of germanium passes from said aqueous liquor to an organic phase which is subsequently submitted to a stripping step by contacting with an alkaline medium, with formation of an aqueous phase containing the major part of germanium from said aqueous liquor.Type: GrantFiled: January 4, 1982Date of Patent: February 4, 1986Assignee: Societe Miniere et Metallurgique de PenarroyaInventors: Denise Rouillard nee Bauer, Gerard Cote, Paolo Fossi, Bruno Marchon
-
Patent number: 4565673Abstract: A process for eluting indium from a chelate resin having a phosphorus atom-containing, chelate-forming group which contains adsorbed indium, which comprises contacting said resin firstly with a primary eluent containing an acid containing no halogen atom in the molecule at a concentration of 0.1N or higher and then with an eluent for indium which is selected from the group consisting of (1) a solution of an acid containing a halogen atom in the molecule, (2) a mixed solution of (a) a metal halide, an ammonium halide or a mixture thereof and (b) an acid and (3) a mixed solution of a sulfide and a base compound.Type: GrantFiled: December 27, 1984Date of Patent: January 21, 1986Assignee: Sumitomo Chemical Company, LimitedInventors: Yushin Kataoka, Masaaki Matsuda, Masahiro Aoi, Kunitake Chino
-
Patent number: 4525332Abstract: Germanium is recovered from aqueous solutions containing germanium, zinc, and antimony by sorption with an ion exchange resin which has as its matrix a backbone polymer to which are attached amine active groups chosen from secondary and tertiary amines and quaternary ammonium groups. The resin exhibits a high selectivity ratio of germanium relative to antimony. The method is particularly useful for the recovery of germanium from materials or electrolytes encountered in the recovery of zinc from ores and complex concentrates.Type: GrantFiled: March 20, 1984Date of Patent: June 25, 1985Assignee: Cominco Ltd.Inventors: Daniel A. D. Boateng, Donald L. Ball, Godefridus M. Swinkels
-
Patent number: 4511551Abstract: The invention is a method for detecting the presence of or a predisposition to cancer in mammalian individuals. A trace element, specifically tin, is administered to the individual in the form of a radioactive isotope or a compound containing a radioactive tracer. The tin-bearing compound thereafter accumulates in the various bodily organs and is excreted. Indicative of the presence of cancer or a predisposition is the lack of accumulation of the radioactive tin compound in the thymus and lymphatic system of the mammal. By comparison of the radioisotope concentration in the urine and blood, the early detection of a precancerous or leukemic condition can be made. The method is applicable to a wide variety of mammals, including human beings.Type: GrantFiled: November 18, 1982Date of Patent: April 16, 1985Assignee: Unique Technologies, IncorporatedInventors: Nathan Cardarelli, Bernadette Cardarelli
-
Patent number: 4500497Abstract: Insolubilized poly(maleic anhydride) is disclosed for use in a method of removing heavy metals, particularly lead, from aqueous media.Type: GrantFiled: June 2, 1982Date of Patent: February 19, 1985Assignee: National Research Development CorporationInventors: Alan G. Rowley, Fiona M. Husband
-
Patent number: 4499057Abstract: The invention relates to new industrial products of the general formula ##STR1## a process for the manufacture of these products and their application as extraction agents in hydrometallurgy.Type: GrantFiled: September 22, 1982Date of Patent: February 12, 1985Assignee: Societe Nationale des Poudres et ExplosifsInventors: Michel Burgard, Marc D. Piteau, Alain J. Rollat, Jean-Pierre G. Senet
-
Patent number: 4478794Abstract: In the roasting (oxidation) of mixed zinc sulphide/lead sulphide concentrates, to give an oxidic product for reduction, improved sulphur elimination and reduced lead volatilization are achieved by mixing 2-20% by weight of zinc oxide with the mixed sulphide materials, forming pellets of 2-15 mm diameter and roasting these under controlled oxidation conditions, firstly at a lower temperature and then at a higher temperature; preferably at 850.degree.-950.degree. C. for the first stage and at 950.degree.-1050.degree. C. for the last stage.Type: GrantFiled: March 3, 1983Date of Patent: October 23, 1984Assignees: Metallurgical Processes Limited, I. S. C. Smelting LimitedInventors: Albert Kruger, Richard Healey
-
Patent number: 4466948Abstract: The disclosure relates to a process for removing heavy metal ions and arsenic from wet-processed phosphoric acid, wherein the crude wet-processed phosphoric acid is treated at temperatures between 10.degree. and 100.degree. C. initially with a diorganyldithiosphosphoric acid ester and then with an adsorbent, and the phoshoric acid so purified is separated from the ester and adsorbent. More particularly, the wet-processed phosphoric acid is treated with the diorganyldithiophosphoric acid ester at temperatures higher than 50.degree. C. and with the adsorbent at temperatures lower than 50.degree. C.Type: GrantFiled: June 24, 1983Date of Patent: August 21, 1984Assignee: Hoechst AktiengesellchaftInventors: Gunther Schimmel, Reinhard Gradl, Gero Heymer
-
Patent number: 4452768Abstract: The disclosure relates to process for removing heavy metal ions, especially cadmium, copper, lead and mercury ions from wet-processed phosphoric acid. To this end, the crude acid is contacted with a mixture consisting of an adsorbent and a diorganyldithiophosphoric acid ester or, after treatment with the ester, the acid is contacted with the adsorbent alone, and the purified phosphoric acid is ultimately separated from the ester and adsorbent.Type: GrantFiled: January 3, 1983Date of Patent: June 5, 1984Assignee: Hoechst AktiengesellschaftInventors: Reinhard Gradl, Gunther Schimmel, Werner Krause, Gero Heymer
-
Patent number: 4432952Abstract: A substituted 8-hydroxyquinoline is added to the alphahydroxyoxime extractant, which allows extracting germanium at lower acidity and with a better yield.Type: GrantFiled: September 22, 1982Date of Patent: February 21, 1984Assignee: Metallurgie Hoboken-OverpeltInventors: Achille De Schepper, Marc Coussement, Antoine Van Peteghem
-
Patent number: 4432951Abstract: Germanium is separated from an aqueous solution by means of a substituted 8-hydroxyquinoline extractant.Re-extraction of germanium from the extractant is carried out above 40.degree. C. and with an organic phase: aqueous phase volume ratio less than 1, whereby obtaining a high re-extraction yield.Type: GrantFiled: September 22, 1982Date of Patent: February 21, 1984Assignee: Metallurgie Hoboken-OverpeltInventors: Achille De Schepper, Marc Coussement, Antoine Van Peteghem
-
Patent number: 4415540Abstract: The specification discloses a method for recovering non-ferrous metals such as zinc or copper iron from their concentrates, ores or any other metal containing materials into a solution containing these non-ferrous metals as sulphates and a minimal amount of dissolved iron. The resultant solution is suited without or with minimum pre-purification treatment for conventional electrowinning processes to recover such non-ferrous metals with less difficulties than the previous methods involving complex iron-removal processing. There is disclosed a method for recovering at least one non-ferrous metal soluble in sulphuric acid from a strong sulphuric acid solution containing said metal and iron as sulphates, said method comprising the following consecutive steps:subjecting said solution in a sub-divided form to thermal decomposition in a fluidized bed reactor at a temperature of from 600.degree. to 750.degree. C.Type: GrantFiled: February 8, 1982Date of Patent: November 15, 1983Assignee: Provincial Holdings Ltd.Inventors: Igor A. E. Wilkomirsky, Roy S. Boorman, Robert S. Salter
-
Patent number: 4389379Abstract: A process for selective liquid-liquid extraction of germanium from an aqueous acidic liquor containing, besides germanium, at least another metal selected from the group which comprises cadmium, zinc, cobalt and nickel. This process includes extracting germanium from said aqueous liquor by contacting said liquor with an organic medium containing a diluent and an extractant, said diluent being immiscible with said aqueous liquor. The major part of germanium passes from said aqueous liquor to an organic phase which is subsequently submitted to a stripping step by contacting with an alkaline medium, with formation of an aqueous phase containing the major part of germanium from said aqueous liquor.Type: GrantFiled: August 15, 1980Date of Patent: June 21, 1983Assignee: Societe Miniere et Metallurgique de PenarroyaInventors: Denise Rouillard epouse Bauer, Gerard Cote, Paolo Fossi, Bruno Marchon
-
Patent number: 4385038Abstract: A process is disclosed for the recovery of lead, silver and gold from the iron-bearing residue of an electrolytic zinc process by froth-flotating a slurry of the iron-bearing residue in the presence of a sulfidic collector agent in order to froth-flotate the sulfides and to separate them from the iron-bearing residue. The iron-bearing residue is sulfidized selectively in order to convert the lead, silver and possibly gold substantially quantitatively to sulfides before the iron-bearing residue is froth-flotated.Type: GrantFiled: September 29, 1981Date of Patent: May 24, 1983Assignee: Outokumpu OyInventors: Jussi K. Rastas, Kaarlo M. J. Saari, Vaino V. H. Hintikka, Jaakko O. Leppinen, Aimo E. Jarvinen
-
Patent number: 4377555Abstract: A functionalized silica is prepared by reacting silica with a silane and an aromatic hydroxy aldehyde. The product is useful for removing metals from solution, e.g., Cu from ATK, or in the extraction of U from solutions arising from the processing of its ores.Type: GrantFiled: July 27, 1977Date of Patent: March 22, 1983Assignee: The British Petroleum Company LimitedInventors: Ronald D. Hancock, Ian V. Howell
-
Patent number: 4373070Abstract: Novel sequestering agents useful for the extraction of metal values and in various organic syntheses comprise a cross-linked organic polymeric substrate, said substrate having covalently coupled thereto a plurality of functional groups, the free valence of which having the structural formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.6 and R.sub.7, which are identical or different, each represents a hydrogen atom or an alkyl radical having 1 to 4 carbon atoms, R.sub.5 and R.sub.8, which are also identical or different, each represents a hydrogen atom, an alkyl or cycloalkyl radical having 1 to 12 carbon atoms, a phenyl radical, a --C.sub.g H.sub.2q --.phi. or C.sub.q H.sub.2+1 --.phi.-- radical, and further wherein q ranges from 1 to about 12, and n, m and p, which are also identical or different, range from 1 to 10, and .phi. is phenyl.Type: GrantFiled: August 25, 1981Date of Patent: February 8, 1983Assignee: Rhone-Poulenc IndustriesInventor: Gerard Soula
-
Patent number: 4339269Abstract: An improved process for increasing (1) the removal of sulfur from lead concentrates and (2) the ratio of fresh, lead concentrate in the feed to a conventional lead concentrate sintering machine. Oxygen is added to the air of the updraft ignition section in predetermined amounts coupled with predetermined reductions and finally, termination of oxygen enrichment at a predetermined distance from the point of downdraft ignition. Additional cooling is supplied by use of finely dispersed, liquid water introduced into preselected wind boxes at predetermined positions downstream of the termination of oxygen enrichment.Type: GrantFiled: September 2, 1980Date of Patent: July 13, 1982Assignee: University of UtahInventor: George W. Healy
-
Patent number: 4317803Abstract: The specification discloses a method for recovering non-ferrous metals such as zinc or copper from their concentrates, ores or any other metal containing materials into a solution containing these non-ferrous metals as sulphates and a minimal amount of dissolved iron. The resultant solution is suited without or with minimum pre-purification treatment for conventional electrowinning processes to recover such non-ferrous metals with less difficulties than the previous methods involving complex iron-removal processing. There is disclosed a method for recovering at least one non-ferrous metal soluble in sulphuric acid from a strong sulphuric acid solution containing said metal and iron as sulphates, said method comprising the following consecutive steps:subjecting said solution in a sub-divided form to thermal decomposition in a fluidized bed reactor at a temperature of from 600.degree. to 750.degree. C.Type: GrantFiled: September 22, 1980Date of Patent: March 2, 1982Assignee: Provincial Holdings Ltd.Inventors: Igor A. E. Wilkomirsky, Roy S. Boorman, Robert S. Salter
-
Patent number: 4292284Abstract: Indium is recovered effectively from an aqueous leached solution containing indium ions, together with other ions such as ferric ions, zinc ions, etc. if any, by adjusting the pH of the aqueous solution to 0.25-4.5, extracting the indium ions from the aqueous solution with an organic solvent solution formed by diluting an extraction reagent containing a monoalkylphosphoric acid and/or a dialkylphosphoric acid and a trialkylphosphoric acid in 1:2-5 by volume ratio with a phase-stabilizing water-immiscible organic solvent and then back-extracting the indium ions in the organic solvent solution with an aqueous sulfuric acid solution.Type: GrantFiled: June 27, 1980Date of Patent: September 29, 1981Assignee: Toho Aen Kabushiki KaishaInventors: Keishi Tomii, Hideyuki Tsuchida
-
Patent number: 4291009Abstract: Tin salts, such as, for example, alkali metal stannates, are produced by contacting at elevated temperatures an aqueous alkaline solution, such as for example, alkali metal hydroxide solutions, with a tin-containing material in the presence of a reaction promotor comprising the combination of activated carbon and an oxygen supplying agent.Type: GrantFiled: June 19, 1980Date of Patent: September 22, 1981Assignee: Vulcan Materials CompanyInventor: John A. Franks, Jr.
-
Patent number: 4224122Abstract: The specification discloses a method for recovering non-ferrous metals such as zinc or copper from their concentrates, ores or any other metal containing materials into a solution containing these non-ferrous metals as sulphates and a minimal amount of dissolved iron. The resultant solution is suited without or with minimum pre-purification treatment for conventional electrowinning processes to recover such non-ferrous metals with less difficulties than the previous methods involving complex iron-removal processing. There is disclosed a method for recovering at least one non-ferrous metal soluble in sulphuric acid from a strong sulphuric acid solution containing said metal and iron as sulphates, said method comprising the following consecutive steps:subjecting said solution in a sub-divided form to thermal decomposition in a fluidized bed reactor at a temperature of from 600.degree. to 750.degree. C.Type: GrantFiled: September 11, 1978Date of Patent: September 23, 1980Assignee: New Brunswick Research and Productivity CouncilInventors: Igor A. E. Wilkomirsky, Roy S. Boorman, Robert S. Salter
-
Patent number: 4209501Abstract: A process for forming a metal chloride of a metal or its compound comprising forming a liquid fused salt bath mixture of at least two metal chlorides with one of the chlorides being selected from the group consisting of ferric chloride, ferrous chloride, cupric chloride and cuprous chloride, and introducing the metal or compound into the liquid fused salt bath in the presence of a chlorine source to form the metal chloride and elemental sulfur, and recovering the formed chloride from the liquid fused salt bath mixture. Chlorine gas or sulfur chloride may be introduced into the bath as an additional source of chlorine for reaction with the metal and for the generation of a portion of the ferrous chloride or cuprous chloride into ferric chloride or cupric chloride.Type: GrantFiled: January 4, 1979Date of Patent: June 24, 1980Assignee: Cato Research CorporationInventor: Paul R. Kruesi
-
Patent number: 4204869Abstract: Silver-precipitating nuclei are prepared by partially oxidizing a stannous salt reducing agent and then reducing a noble metal salt or complex with said reducing agent.Type: GrantFiled: April 4, 1978Date of Patent: May 27, 1980Assignee: Polaroid CorporationInventors: Charles H. Byers, Robert W. Hausslein, Mara O. Nestle
-
Patent number: 4203952Abstract: A process for the removal of heavy metals uranium and transition metals other than noble transition metals from solution by contacting the solution with the product obtained by reacting an inorganic solid eg. silica gel containing surface hydroxyl groups with a silicon compound of defined formula containing a free thiol group or a free amino group and either an --OR group or a halogen atom under conditions which effect reaction between the hydroxyl group and the --OR group or halogen atom thereby bonding the silicon compound to the inorganic solid.Type: GrantFiled: September 8, 1977Date of Patent: May 20, 1980Assignee: The British Petroleum Company LimitedInventors: Ronald D. Hancock, Ian V. Howell
-
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
-
Patent number: 4111660Abstract: A liquid-liquid extraction method and apparatus using an elongated extraction column arranged at an angle to the horizontal. The column is divided by means of partitions into a plurality of compartments which are in communication by apertures in such partitions. Each end of the extraction column has an inlet and an outlet, which can preferably be arranged concentrically, for the introduction and discharge of two immiscible liquids of differing densities, the less dense liquid being introduced into the lower inlet and discharged through the upper outlet and vice versa for the more dense liquid. The column during extraction is rotated either about its own axis or a spaced parallel axis. The extracting liquid can be circulated for back-extraction through a similarly arranged column containing a third liquid immiscible with the extraction liquid and of differing density.Type: GrantFiled: July 16, 1976Date of Patent: September 5, 1978Inventors: Yozo Kabasawa, Takenori Tanimura
-
Patent number: 4065544Abstract: Finely-divided metal oxides are prepared by the steps of (a) contacting a compound of a metal with a carbohydrate material to obtain an intimate mixture thereof, (b) igniting this mixture to oxidize the same and to insure conversion of substantially all of said metal compound to a fragile agglomerate of its metal oxide, and (c) pulverizing the product of step (b) to form a finely-divided metal oxide powder having a mean particle size below about 1.0 micron. Certain of the finely-divided metal oxide powders produced by this process have the useful property of sinterability at temperatures significantly lower than metal oxide powders heretofore readily available. The powders are useful in the preparation of high strength compacted shapes for use in high temperature and/or corrosive environment, in the preparation of refractory cements, catalysts, catalysts supports and the like.Type: GrantFiled: June 20, 1974Date of Patent: December 27, 1977Assignee: Union Carbide CorporationInventors: Bernard H. Hamling, Alfred W. Naumann
-
Patent number: RE33410Abstract: Process for extraction of germanium from aqueous acid solution by contacting with an organic liquid containing a hydroxy-oxime and recovering the extracted germanium from the organic phase.Type: GrantFiled: February 26, 1990Date of Patent: October 30, 1990Assignee: Acec-Union Miniere S.A., MHO DivisionInventors: Achille De Schepper, Antoine Van Peteghem