Binary Compound Patents (Class 423/561.1)
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Patent number: 7426959Abstract: A system including a mechanism for recovering oil and/or gas from an underground formation, the oil and/or gas comprising one or more sulfur compounds; a mechanism for converting at least a portion of the sulfur compounds from the recovered oil and/or gas into a carbon disulfide formulation; and a mechanism for releasing at least a portion of the carbon disulfide formulation into a formation.Type: GrantFiled: April 19, 2006Date of Patent: September 23, 2008Assignee: Shell Oil CompanyInventors: Dean Chien Wang, Alexander Michiel Mollinger, Douglas Charlton McCammon, Raul Valdez, Johan Jacobus Van Dorp, Eric Johannes Puik, Michael Zvi Golombok, Willem Van Vark, Michiel Jan Groeneveld, Brendan Dermot Murray, Thomas Mikus
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Patent number: 7410625Abstract: A method and structure for making magnetite nanoparticle materials by mixing iron salt with alcohol, carboxylic acid and amine in an organic solvent and heating the mixture to 200-360° C. is described. The size of the particles can be controlled either by changing the iron salt to acid/amine ratio or by coating small nanoparticles with more iron oxide. Magnetite nanoparticles in the size ranging from 2 nm to 20 nm with a narrow size distribution are obtained with the invention.Type: GrantFiled: August 29, 2006Date of Patent: August 12, 2008Assignee: International Business Machines CorporationInventor: Shouheng Sun
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Patent number: 7402547Abstract: Contact of a crude feed with one or more catalysts produces a total product that includes a crude product. The crude feed has a residue content of at least 0.2 grams of residue per gram of crude feed. Methods of preparing the one or more catalysts are described. The crude product is a liquid mixture at 25° C. and 0.101 MPa. One or more properties of the crude product may be changed by at least 10% relative to the respective properties of the crude feed. The crude product may include hydrocarbons with different boiling point distributions.Type: GrantFiled: December 16, 2004Date of Patent: July 22, 2008Assignee: Shell Oil CompanyInventors: Scott Lee Wellington, Stanley Nemec Milam
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Publication number: 20080157031Abstract: A method for the non-catalytic growth of nanowires is provided. The method includes a reaction chamber with the chamber having an inlet end, an exit end and capable of being heated to an elevated temperature. A carrier gas with a flow rate is allowed to enter the reaction chamber through the inlet end and exit the chamber through the exit end. Upon passing through the chamber the carrier gas comes into contact with a precursor which is heated within the reaction chamber. A collection substrate placed downstream from the precursor allows for the formation and growth of nanowires thereon without the use of a catalyst. A second embodiment of the present invention is comprised of a reaction chamber, a carrier gas, a precursor target, a laser beam and a collection substrate. The carrier gas with a flow rate and a gas pressure is allowed to enter the reaction chamber through an inlet end and exit the reaction chamber through the exit end.Type: ApplicationFiled: January 3, 2007Publication date: July 3, 2008Applicants: Toyota Engineering & Manufacturing North America, Inc.Inventors: Joshua Goldberger, Melissa Fardy, Oded Rabin, Allon Hochbaum, Minjuan Zhang, Peidong Yang
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Patent number: 7393516Abstract: A method of preparing metal chalcogenides from elemental metal or metal compounds has the following steps: providing at least one elemental metal or metal compound; providing at least one element from periodic table groups 13-15; providing at least one chalcogen; and combining and heating the chalcogen, the group 13-15 element and the metal at sufficient time and temperature to form a metal chalcogenide. A method of functionalizing the surface of semiconducting nanoparticles has the following steps: providing at least one metad compound; providing one chalcogenide having a cation selected from the group 13-15 (B, Al, Ga, In, Si, Ge, Sn, Pb, P, As, Sb and Bi); dissolving the chalcogenide in a first solution; dissolving the metal compound in a second solution; providing and dissolving a functional capping agent in at least one of the solutions of the metal compounds and chalcogenide; combining all solutions; and maintaining the combined solution at a proper temperature for an appropriate time.Type: GrantFiled: February 2, 2004Date of Patent: July 1, 2008Inventors: Dong-Kyun Seo, Nora Iancu, Liming Wu
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Publication number: 20080112878Abstract: A chalcogenide compound synthesis method includes homogeneously mixing solid particles and, during the mixing, imparting kinetic energy to the particle mixture, heating the particle mixture, alloying the elements, and forming alloyed particles containing the compound. Another chalcogenide compound synthesis method includes, under an inert atmosphere, melting the particle mixture in a heating vessel, removing the melt from the heating vessel, placing the melt in a quenching vessel, and solidifying the melt. The solidified melt is reduced to alloyed particles containing the compound. An alloy casting apparatus includes an enclosure, a heating vessel, a flow controller, a collection pan and an actively cooled quench plate. The heating vessel has a bottom-pouring orifice and a pour actuator. The flow controller operates the pour actuator from outside the enclosure. The quench plate is positioned above a bottom of the collection pan and below the bottom-pouring orifice.Type: ApplicationFiled: November 9, 2006Publication date: May 15, 2008Inventors: Janine K. Kardokus, Michael R. Pinter, Ravi Rastogi, Diana L. Morales, Michael D. Bayton, Norman L. Sand, Bryan E. Powers
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Publication number: 20080113102Abstract: Agents for surface treatment which can impart excellent corrosion resistance to zinc or zinc alloy products at low cost. The agents for the surface treatment of zinc or zinc alloy products of this invention include at least one water-soluble compound which contains antimony, bismuth, tellurium or tin. Ideally, a nickel salt and/or a manganese salt is also included, and most desirably tannins and/or thioureas are also included. Ideally, the zinc or zinc alloy products which have been immersed and treated in an aqueous solution which contains these agents for surface treatment are immersed in an aqueous solution which includes a sealing treatment agent selected according to the colour of the zinc or zinc alloy product to seal pinholes.Type: ApplicationFiled: November 13, 2006Publication date: May 15, 2008Inventors: Takashi Arai, Ro Bo Shin, Takahisa Yamamoto
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Patent number: 7364716Abstract: The present disclosure relates to a nanoparticle containing at least one metal sulfide nanocrystal having a surface modified with a carboxylic acid, wherein the carboxylic acid has at least one aryl group. The present disclosure also describes a method of preparing the nanoparticle, the method consisting of: (a) providing a first solution having a first organic solvent, and a non-alkali metal salt and a carboxylic acid dissolved therein, wherein the carboxylic acid has at least one aryl group; (b) providing a sulfide material; and (c) combining the first solution and the sulfide material to form a reaction solution, thereby forming a nanoparticle containing at least one metal sulfide nanocrystal having a surface modified with the carboxylic acid, wherein the carboxylic acid has at least one aryl group.Type: GrantFiled: September 22, 2006Date of Patent: April 29, 2008Assignee: 3M Innovative Properties CompanyInventors: Igor Y. Denisyuk, Todd R. Williams
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Publication number: 20080090394Abstract: A method to fabricate semiconductor nanocrystals which comprises dissolving a metal source in a first solvent that contains at least one functional —OH group to form a mixture and heating the mixture to form a solution 1 and dissolving a X source in a second solvent which contains at least one functional —OH group, to form a solution 2 and mixing solution 2 and then combining solution 2 into solution 1, and heating and separating the solution out, to produce semiconductor nanocrystals.Type: ApplicationFiled: August 24, 2005Publication date: April 17, 2008Applicant: UNIVERSITY OF DELAWAREInventors: John Q. Xiao, Yuwen Zhao
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Patent number: 7335345Abstract: An economic, direct synthetic method for producing water soluble QDs that are ready for bioconjugation is provided. The method can produce aqueous QDs with emission wavelengths varying from 400 nm to 700 nm. Highly luminescent metal sulfide (MS) QDs are produced via an aqueous synthesis route. MS QDs are capped with thiol-containing charged molecules in a single step. The resultant MS QDs exhibit the distinctive excitonic photoluminescence desired of QDs and can be fabricated to avoid undesirable broadband emissions at higher wavelengths. This provides a significant improvement over the present complex and expensive commercial processes for the production of QDs. The aqueous QDs are stable in biological fluids over a long period of time. In addition, nontoxic ZnS QDs have been produced with good photoluminescence properties by refluxing the ZnS QD suspensions over a period of time.Type: GrantFiled: May 24, 2005Date of Patent: February 26, 2008Assignee: Drexel UniversityInventors: Wei-Heng Shih, Wan Y. Shih, Hui Li, Melissa Colleen Schillo
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Patent number: 7329399Abstract: A hydrogen-trapping compound is provided, along with a process for manufacturing the compound, and its uses, wherein the hydrogen-trapping compound is characterized in that it contains at least one metal salt of formula MX(OH), in which M represents a divalent transition element, for example Co or Ni; O represents an oxygen atom; X represents an atom of group 16 of the Periodic Table of the Elements, excluding O, for example a sulphur atom; and H represents a hydrogen atom, and wherein the hydrogen-trapping compound is effective for trapping hydrogen, hydrogen within a material and free hydrogen and is applicable in situations in which hydrogen is evolved and in which it has to be trapped, especially for safety reasons.Type: GrantFiled: August 25, 2004Date of Patent: February 12, 2008Assignees: Commissariat a l'Energie Atomique, Compagnie Generale des Matieres NucleairesInventors: Sylvie Camaro, Quentin Ragetly, Chantal Riglet-Martial
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Patent number: 7267810Abstract: A method of making nanocrystals involves adding a chalocogen source to a hot solution of a metal-containing non-organometallic compound, such as CdO, in a first ligand solvent, such as TOP, and preferably subsequently cooling the resulting mixture to a lower temperature to grow the nanocrystals at said lower temperature. The method can involve either one ligand or two-ligand systems.Type: GrantFiled: December 30, 2004Date of Patent: September 11, 2007Assignee: National Research Council of CanadaInventors: Kui Yu, John Ripmeester
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Patent number: 7255846Abstract: The present invention provides methods for synthesis of IV–VI nanostructures, and thermoelectric compositions formed of such structures. In one aspect, the method includes forming a solution of a Group IV reagent, a Group VI reagent and a surfactant. A reducing agent can be added to the solution, and the resultant solution can be maintained at an elevated temperature, e.g., in a range of about 20° C. to about 360° C., for a duration sufficient for generating nanoparticles as binary alloys of the IV–VI elements.Type: GrantFiled: May 3, 2005Date of Patent: August 14, 2007Assignees: Massachusetts Institute of Technology, The Trustees of Boston CollegeInventors: Zhifeng Ren, Gang Chen, Bed Poudel, Shankar Kumar, Wenzhong Wang, Mildred Dresselhaus
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Patent number: 7247291Abstract: The present invention relates to nano sized sulfide compounds of cerium and a process for the preparation thereof. More particularly, the present invention provides novel nano sized particles of cerium sulfide as well as a novel process for the preparation of nano sized sulfide compounds of cerium by the bioreduction of cerium sulfate or cerium acetate, without resorting to chemical methods. A bioprocess is disclosed to treat trivalent Cerium salt with sulfate-reducing bacteria (SRB) under controlled conditions to obtain a biomass, which is subjected to staggered heating upto a temperature of 600-1500° C. The sulfide of Cerium is finally separated for application in pigment industry.Type: GrantFiled: March 1, 2006Date of Patent: July 24, 2007Inventors: Kalarical Janardhanan Sreeram, Harinarain Yamini Shrivastava, Balachandran Unni Nair, Thirumalachari Ramasami, Upadhyayula Venkata Varadaraju
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Patent number: 7238331Abstract: The present invention discloses a process for producing nano-powders and powders of nano-particle loose aggregate, which includes: (a) providing at least two reactant solutions A and B capable of rapidly reacting to form deposits; (b) supplying the at least two reactant solutions A and B at least at the reaction temperature into a mixing and reaction precipitator respectively, in which mixing reaction and precipitation are continuously carried out in sequence, the mixing and reaction precipitator being selected from at least one of a tubular ejection mixing reactor, a tubular static mixing reactor and an atomization mixing reactor; and (c) treating the deposit-containing slurry continuously discharged from the mixing reaction precipitator.Type: GrantFiled: July 26, 2002Date of Patent: July 3, 2007Assignee: Anshan University of Science and TechnologyInventors: Yingyan Zhou, Shoushan Gao, Kaiming Wang, Chuangeng Wen, Xiaoqi Li
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Patent number: 7229602Abstract: A method of preparing metal chalcogenide particles. The method comprising the step of reacting an amine and metal complex precursors. The metal complex precursors comprising a chalcogenide and an electrophilic group. The reaction forming metal chalcogenide particles substantially free of the electrophilic group.Type: GrantFiled: June 4, 2004Date of Patent: June 12, 2007Assignee: National University of SingaporeInventors: Wee Shong Chin, Zhihua Zhang, Wen Pei Lim
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Patent number: 7211230Abstract: The present invention discloses a process for producing nanometer powders, comprising the following steps: (a) providing reactant solution A and reactant solution B that can rapidly react to form precipitate; (b) continuously adding said solution A and solution B into a mixing and reacting precipitator with a stator and a rotor in operation, respectively; and (c) post-treating the precipitate-containing slurry discharged continuously from the mixing and reacting precipitator. The present process could produce nanometer powders with adjustable particle size, good homogeneity in size and good dispersity. The method also has the characteristics of high production yield, simplicity in process and low consumption of energy. It could be applied to produce various nanometer powders of metals, oxides, hydroxides, salts, phosphides and sulfides as well as organic compounds.Type: GrantFiled: March 5, 2002Date of Patent: May 1, 2007Assignee: Anshan University of Science and TechnologyInventors: Yingyan Zhou, Shoushan Gao, Hongxia Li, Kaiming Wang, Xiaoqi Li, Lixiang Li, Chuangeng Wen
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Patent number: 7208133Abstract: A high temperature non-aqueous synthetic procedure for the preparation of substantially monodisperse IV-VI semiconductor nanoparticles is provided. The procedure includes introducing a first precursor selected from the group consisting of a molecular precursor of a Group IV element and a molecular precursor of a Group VI element into a reaction vessel that comprises at least an organic solvent to form a mixture. Next, the mixture is heated and thereafter a second precursor of a molecular precursor of a Group IV element or a molecular precursor of a Group VI element that is different from the first is added. The reaction mixture is then mixed to initiate nucleation of IV-VI nanocrystals and the temperature of the reaction mixture is controlled to provide nanoparticles having a diameter of about 20 nm or less.Type: GrantFiled: November 22, 2004Date of Patent: April 24, 2007Assignee: International Business Machines CorporationInventors: Kyung-Sang Cho, Wolfgang Gaschler, Christopher B. Murray, Dmitri Talapin
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Patent number: 7186391Abstract: The present invention provides a lanthanum sulfide or cerium sulfide sintered compact usable as a thermoelectric conversion material having a high Seebeck coefficient. The sintered compact has a chemical composition of La2S3 or Ce2S3, and a crystal structure consisting of a mixture of beta and gamma phases having a Seebeck coefficient higher than that of the crystal structure otherwise being in gamma single-phase. The sintered compact is produced by preparing a beta-phase La2S3 or alpha-phase Ce2S3 powder of raw material having a high purity with a suppressed carbon impurity concentration and a given range of oxygen concentration, charging the raw material into a carbon die having an inner surface covered with an h-BN applied thereon, and hot-pressing the charged material under vacuum to form a mixture of beta and gamma phases having a high Seebeck coefficient.Type: GrantFiled: November 17, 2000Date of Patent: March 6, 2007Assignees: Japan Science and Technology Agency, National Institute for Materials ScienceInventors: Yoichiro Uemura, Mamoru Mitomo, Toshiyuki Nishimura, Shinji Hirai, Kazuyoshi Shimakage
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Patent number: 7153541Abstract: The present invention provides means for inhibiting the oxidation of a metal sulfide-containing material, such as ore mine waste rock or metal sulfide taiulings, by coating the metal sulfide-containing material with an oxidation-inhibiting two-tail lipid coating (12) thereon, thereby inhibiting oxidation of the metal sulfide-containing material in acid mine drainage conditions. The lipids may be selected from phospholipids, sphingolipids, glycolipids and combinations thereof.Type: GrantFiled: December 4, 2002Date of Patent: December 26, 2006Inventors: Alicia Elsetinow, Michael J. Borda, Martin A. Schoonen, Daniel R. Strongin
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Patent number: 7138098Abstract: A method of manufacturing a nanocrystallite from a M-containing salt forms a nanocrystallite. The nanocrystallite can be a member of a population of nanocrystallites having a narrow size distribution and can include one or more semiconductor materials. Semiconducting nanocrystallites can photoluminesce and can have high emission quantum efficiencies.Type: GrantFiled: October 8, 2004Date of Patent: November 21, 2006Assignee: Massachusetts Institute of TechnologyInventors: Moungi Bawendi, Nathan E. Stott
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Patent number: 7132386Abstract: The present invention involves methods and compositions for synthesizing catalysts/porous materials. In some embodiments, the resulting materials are amorphous sulfide sieves that can be mass-produced for a variety of uses. In some embodiments, methods of the invention concern any suitable precursor (such as thiomolybdate salt) that is exposed to a high pressure pre-compaction, if need be. For instance, in some cases the final bulk shape (but highly porous) may be same as the original bulk shape. The compacted/uncompacted precursor is then subjected to an open-flow hot isostatic pressing, which causes the precursor to decompose and convert to a highly porous material/catalyst.Type: GrantFiled: April 7, 2004Date of Patent: November 7, 2006Assignee: Board of Regents, The University of Texas SystemInventors: Mohammad H. Siadati, Gabriel Alonso, Russell R. Chianelli
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Patent number: 7128891Abstract: A method and structure for making magnetite nanoparticle materials by mixing iron salt with alcohol, carboxylic acid and amine in an organic solvent and heating the mixture to 200–360 C is described. The size of the particles can be controlled either by changing the iron salt to acid/amine ratio or by coating small nanoparticles with more iron oxide. Magnetite nanoparticles in the size ranging from 2 nm to 20 nm with a narrow size distribution are obtained with the invention. The invention can be readily extended to other iron oxide based nanoparticle materials, including MFe2O4 (M=Co, Ni, Cu, Zn, Cr, Ti, Ba, Mg) nanomaterials, and iron oxide coated nanoparticle materials. The invention also leads to the synthesis of iron sulfide based nanoparticle materials by replacing alcohol with thiol in the reaction mixture.Type: GrantFiled: August 24, 2005Date of Patent: October 31, 2006Assignee: International Business Machines CorporationInventor: Shouheng Sun
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Patent number: 7125820Abstract: Non-noble metal transition metal catalysts can replace platinum in the oxidation reduction reaction (ORR) used in electrochemical fuel cells. A RuxSe catalyst is prepared with comparable catalytic activity to platinum. An environmentally friendly aqueous synthetic pathway to this catalyst is also presented. Using the same aqueous methodology, ORR catalysts can be prepared where Ru is replaced by Mo, Fe, Co, Cr, Ni and/or W. Similarly Se can be replaced by S.Type: GrantFiled: July 29, 2003Date of Patent: October 24, 2006Assignee: Ballard Power Systems Inc.Inventor: Stephen A Campbell
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Patent number: 7101520Abstract: Methods for producing metal/metalloid oxide particles comprise rare earth metals herein include reacting a reactant stream in a gas flow. The reactant stream includes a rare earth metal precursor and an oxygen source. A collection of particles comprising metal/metalloid oxide have an average particle size from about 15 nm to about 1 micron. The metal/metalloid oxide comprises a non-rare earth metal oxide wherein less than about 25 percent of a non-rare earth metal is substituted with a rare earth metal. The metal/metalloid oxide particles can be reacted with H2S or C2S to form corresponding metal/metalloid sulfide particles. The metal/metalloid sulfide particles can be doped with rare earth metals. The particles are useful as phosphors, for example for use in displays.Type: GrantFiled: February 4, 2004Date of Patent: September 5, 2006Assignee: NanoGram CorporationInventor: Sujeet Kumar
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Patent number: 7045112Abstract: Disclosed herein are compositions of a manganese sulfide (MnS) compound useful as additives for making a sintered product. Also disclosed herein is a method of making the composistions in which molybdenum (Mo) or Fe—Mo is added to the MnS compound to improve machinability and to obtain a more stable MnS compound, thereby reducing any change in weight and size in a sintering process. The compositions can suppress erosion of parts in a sintering furnace during a sintering process, prevent sooting on a surface of the sintered product from occurring, and enhance resistance to moisture in the air to keep the sintered product in the air for a long time.Type: GrantFiled: May 4, 2005Date of Patent: May 16, 2006Assignee: Kaya Ama Inc.Inventors: Dong Kyu Park, Hyung Bum Kim
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Patent number: 7045066Abstract: A method of removing arsenic from water by using a reactor that is provided with a fluidized bed of carriers is disclosed. An arsenic-containing influent is mixed in the reactor with a sulfide aqueous solution or metallic salt aqueous solution at a predetermined pH, thereby resulting in formation of crystals of arsenic sulfides or arsenic acid metal salts. The arsenic contained in the influent is thus removed by crystallization. An effluent with a reduced arsenic content is discharged from the reactor. The carriers, on which the crystals are formed, are periodically removed from the reactor which is replenished with fresh carriers immediately after.Type: GrantFiled: December 19, 2003Date of Patent: May 16, 2006Assignee: Industrial Technology Research InstituteInventors: Mao-Sung Lee, Wang-Kuan Chang, Chihpin Huang, Shih-Ming Yen
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Patent number: 7022469Abstract: A silver halide emulsion is disclosed, comprising at least one monovalent Au(I) complex coordinated with a compound represented by the following formula (1): R1—Ch—R2??(1) wherein R1 and R2 each independently represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group, R1 and R2 may combine with each other to form a 3-, 4-, 5-, 6- or 7-membered ring, and Ch represents a sulfur atom, a selenium atom or a tellurium atom.Type: GrantFiled: April 16, 2004Date of Patent: April 4, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Suzuki, Hirotomo Sasaki
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Patent number: 7018605Abstract: A method of sulfidation removal of zinc using hydrogen sulfide is provided, desirably at a temperature at 60° C. or lower, wherein in a container that is pressurized at 0.1 MPa or less with respect to atmospheric pressure, by making the pH of the solution 1.5 to 4.0, and the concentration of hydrogen sulfide in gas 2 volume % or greater in equilibrium with the hydrogen sulfide dissolved in the solution, the zinc in solution is removed by sulfidation to 1 mg/liter or less.Type: GrantFiled: February 24, 2003Date of Patent: March 28, 2006Assignee: Sumitomo Metal Mining Co., Ltd.Inventors: Hiroshi Kobayashi, Yoshitomo Ozaki, Masaki Imamura
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Patent number: 7018606Abstract: A process and apparatus are presented for obtaining inorganic fullerene-like nanostructures. A metal oxide is evaporated at predetermined temperature conditions, and is swept towards a reacting zone, to which first and second gas phase reacting agents are concurrently swept. The evaporated metal oxide thus interacts with the first reacting agent and is converted into metal suboxide nanoparticles in the gas phase. The condensing metal suboxide nanoparticles interact with the second reacting agent in the gas phase resulting in substantially pure phase of the inorganic fullerene-like nanoparticles.Type: GrantFiled: October 25, 2001Date of Patent: March 28, 2006Assignee: Yeda Research and Development Co. Ltd.Inventors: Reshef Tenne, Yishay Feldman, Alla Zak, Rita Rosentsveig
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Patent number: 7001583Abstract: A product and method for the removal of pollutant heavy metals from aqueous solutions which precludes the end user from storing, handling, feeding and controlling hazardous soluble sulfide materials. The product is a slurry which includes a mixture of a liquid medium and an essentially insoluble salt wherein the salt is the reaction product of heavy metal ions, preferably selected from Mn++ ions, Fe++ ions, and Fe+++ ions, and sulfide ions derived from soluble sulfide sources such as sodium sulfide, hydrogen sulfide, and sodium hydrosulfide. Addition of the subject slurry to a wastewater stream will effect the precipitation of heavy metals with lesser equilibrium sulfide ion concentrations than that of the essentially insoluble salt. Solids collected by this method may be returned to subsequent wastewater streams for additional removal of heavy metals by any excess heavy metal sulfide salt.Type: GrantFiled: April 14, 2005Date of Patent: February 21, 2006Assignee: Southern Water TreatmentInventor: Gregory S. Bowers
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Patent number: 6979431Abstract: A method for labelling a sulfide compound with technetium or rhenium, comprising the reaction of a disulfide compound with pertechnetate or perrhenate in the presence of borohydride exchange resin to obtain a complex of technetium or rhenium with the sulfide compound. The method can directly label disulfide compounds with technetium or rhenium, can skip the synthetic step of thiol-protected S-precursor, and is useful for high value-added radiopharmaceuticals.Type: GrantFiled: September 24, 2002Date of Patent: December 27, 2005Assignee: Korea Atomic Energy Research InstituteInventors: Kyung Bae Park, Sang Hyun Park, Hui Jeong Gwon, Sun Ju Choi, Byung Chul Shin, Young Don Hong, Sang Mu Choi, Woong Woo Park, Kwang Hee Han, Beom Su Jang
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Patent number: 6967185Abstract: A noble metal sulfide catalyst obtained by reaction of a precursor of at least one noble metal with a thionic species in an aqueous environment essentially free of sulfide ions useful as an electrocatalyst in the depolarized electrolysis of hydrochloric acid.Type: GrantFiled: June 24, 2004Date of Patent: November 22, 2005Assignee: De Nora Elettrodi S.p.A.Inventors: Robert J. Allen, Andrea F. Gulla
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Patent number: 6960556Abstract: A tungsten disulfide powder comprised of macro-spherical particles of tungsten disulfide having an average particle diameter of from about 5 to about 50 micrometers is prepared by successively treating spray-dried powders of ammonium metatungstate with heat in air and sulfidizing the resultant tungsten trioxide in a carbon disulfide-containing atmosphere at about 750° C. The tungsten disulfide powder may also be formed to have a bimodal particle size distribution of the macro-spherical particles and smaller, dispersed micro- to submicron-sized fine particles.Type: GrantFiled: August 12, 2003Date of Patent: November 1, 2005Assignee: Osram Sylvania Inc.Inventor: Richard G. W. Gingerich
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Patent number: 6896817Abstract: A product and method for the removal of pollutant heavy metals from aqueous solutions which precludes the end user from storing, handling, feeding and controlling hazardous soluble sulfide materials. The product is a slurry which includes a mixture of a liquid medium and an essentially insoluble salt wherein the salt is the reaction product of heavy metal ions, preferably selected from Mn++ ions, Fe++ ions, and Fe+++ ions, and sulfide ions derived from soluble sulfide sources such as sodium sulfide, hydrogen sulfide, and sodium hydrosulfide. Addition of the subject slurry to a wastewater stream will effect the precipitation of heavy metals with lesser equilibrium sulfide ion concentrations than that of the essentially insoluble salt. Solids collected by this method may be returned to subsequent wastewater streams for additional removal of heavy metals by any excess heavy metal sulfide salt.Type: GrantFiled: April 15, 2002Date of Patent: May 24, 2005Inventor: Gregory S. Bowers
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Patent number: 6887453Abstract: A rhenium (IV) sulphide (ReS2) nanotube material and a method of preparation of the rhenium (IV) sulphide (ReS2) nanotube material. The rhenium (IV) sulphide (ReS2) nanotube material comprises hollow cylinders of concentric rhenium (IV) sulphide layers, the ReS2 interlayer distance being between 0.5 to 0.7 nm. Each ReS2 layer consists of a layer of rhenium atoms sandwiched between two layers of sulfur atoms.Type: GrantFiled: August 13, 2003Date of Patent: May 3, 2005Assignee: Haldor Topsoe A/SInventors: Michael Brorson, Claus J. H. Jacobsen, Thomas Willum Hansen
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Patent number: 6861038Abstract: A method of continuously producing a non-oxide ceramic formed of a metal constituent and a non-metal constituent. A salt of the metal constituent and a compound of the non-metal constituent and a compound of the non-metal constituent are introduced into a liquid alkali metal or a liquid alkaline earth metal or mixtures to react the constituents substantially submerged in the liquid metal to form ceramic particles. The liquid metal is present in excess of the stoichiometric amount necessary to convert the constituents into ceramic particles to absorb the heat of reaction to maintain the temperature of the ceramic particles below the sintering temperature. Ceramic particles made by the method are part of the invention.Type: GrantFiled: September 3, 2003Date of Patent: March 1, 2005Assignee: International Titanium Powder, LLC.Inventors: Donn Reynolds Armstrong, Stanley S. Borys, Richard Paul Anderson
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Patent number: 6841142Abstract: Nanotubes of transition metal chalcogenides as long as 0.2-20 microns or more, perfect in shape and of high crystallinity, are synthesized from a transition metal material, e.g. the transition metal itself or a substance comprising a transition metal such as an oxide, water vapor and a H2X gas or H2 gas and X vapor, wherein X is S, Se or Te, by a two-step or three-step method including first producing nanoparticles of the transition metal as long as 0.3 microns, and then annealing in a mild reducing atmosphere of the aforementioned gas or gas mixture. The transition metal chalcogenide is preferably WS2 or WSe2. Tips for scanning probe microscopy can be prepared from said long transition metal chalcogenide nanotubes.Type: GrantFiled: May 2, 2000Date of Patent: January 11, 2005Assignee: Yeda Research and Development Co., Ltd.Inventors: Reshef Tenne, Aude Rothschild, Moshe Homyonfer
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Patent number: 6833127Abstract: A structure directing agent is removed from a microporous solid at a temperature below the temperature that would cause the structure directing agent to decompose by cleaving the structure directing agent within the pores of the microporous solid, at a temperature below the temperature that would cause the structure directing agent to decompose, into two or more fragments and removing the fragments from the pores of the microporous solid at a temperature below the temperature that would cause the structure directing agent or its fragments to decompose.Type: GrantFiled: June 12, 2003Date of Patent: December 21, 2004Assignees: California Institute of Technology, Chevron U.S.A. Inc.Inventors: Mark E. Davis, Hyunjoo Lee, Stacey I. Zones
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Patent number: 6793906Abstract: The present invention provides methods for making manganese sulfide without the need for recycling a significant amount of manganese sulfide back to the reaction chamber. The methods are performed by admixing substantially pure manganese, substantially pure sulfur, and iron pyrite. The manganese and sulfur are then reacted to form manganese sulfide. Iron pyrite regulates the reaction and enables the use of conventional equipment in the methods of the present invention. After the reaction ends, the manganese sulfide product is separated from the unreacted manganese, sulfur, and iron.Type: GrantFiled: April 4, 2002Date of Patent: September 21, 2004Inventors: Robert W. Shelton, Donald R. Long
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Publication number: 20040105808Abstract: The present invention is related to an apparatus for the production of inorganic fullerene-like (IF) nanoparticles and nanotubes. The apparatus comprises a chemical reactor, and is further associated with a feeding set up and with a temperature control means for controlling the temperature along the reaction path inside the reactor so as to maintain the temperature to be substantially constant. The invention is further directed to a method for the synthesis of IF-WO3 nanoparticles having spherical shape and having a size up to 0.5 mu m and nanotubes having a length of up to several hundred mu m and a cross-sectional dimension of up to 200 nanometer.Type: ApplicationFiled: May 22, 2003Publication date: June 3, 2004Inventors: Reshef Tenne, Yishay Feldman, Alla Zak, rita Rosentsveig
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Publication number: 20040091410Abstract: A process of preparing an inorganic compound is disclosed, comprising the steps of (a) allowing at least an inorganic raw material compounds (A) and an inorganic raw material compound (B) which are different in solubility in water to react with each other in the presence of a reaction solvent with stirring to deposit an inorganic compound (C), while allowing a part of each of the compound (A) and compound (B) to exist as a solid; andType: ApplicationFiled: October 29, 2003Publication date: May 13, 2004Applicant: Konica Minolta Holdings, Inc.Inventors: Hiroki Nakane, Syoji Matsuzaka
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Patent number: 6733739Abstract: Sulphides are prepared by combining a dithionite compound with an aqueous alkaline solution of an appropriate cation or mixture of cations. On heating the corresponding sulphides are precipitated. The dithionite compound may be a dithionite dianion which is produced as an intermediary when thiourea dioxide is used as a starting material in the solution. Examples of appropriate cations are zinc (as zinc acetate) and copper (as copper acetate). The precipitate is dried and subsequently fired to produce high quality sulphides which may be used as phosphors or other optoelectronic materials.Type: GrantFiled: April 26, 2002Date of Patent: May 11, 2004Inventors: Aron Vecht, Dominic Andrew Davies
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Publication number: 20040062708Abstract: A process of the synthesis of nanotubes of transition metal dichalcogenides by chemical transport with the addition of fullerences is provided to obtain nanotubes of transistion metal dichalcogenides. The nanotubes are hexagonally arranged in form of needle-like bundles. The process comprises chemical transport, in which the fullerences exist in the vapour phase. The chemical fullerences are used at conditions, in which the fullerences exist in the vapour phase. The chemical transport reaction occurs in a quartz ampoule, sealed at a pressure lower than 0.66 Pa. The temperature in the hot part of the ampoule is higher than 830° C.Type: ApplicationFiled: August 15, 2003Publication date: April 1, 2004Inventors: Maja Remskar, Ales Mrzel, Zora Skraba, Dragan D. Mihailovic, Igor Musevic
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Publication number: 20040038832Abstract: A tungsten disulfide powder comprised of macro-spherical particles of tungsten disulfide having an average particle diameter of from about 5 to about 50 micrometers is prepared by successively treating spray-dried powders of ammonium metatungstate with heat in air and sulfidizing the resultant tungsten trioxide in a carbon disulfide-containing atmosphere at about 750° C. The tungsten disulfide powder may also be formed to have a bimodal particle size distribution of the macro-spherical particles and smaller, dispersed micro- to submicron-sized fine particles.Type: ApplicationFiled: August 12, 2003Publication date: February 26, 2004Applicant: OSRAM SYLVANIA Inc.Inventor: Richard G.W. Gingerich
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Publication number: 20030231995Abstract: The use of ozone during certain stages of metal separation by flotation degrades certain collectors that are absorbed on the particle surface, as well as the collectors and frothers in the liquid slurry. As a result, the mineral particle has a fresh surface and new chemical reagent(s) can be added in the subsequent flotation step(s). Also since ozone oxidizes the iron sulfide particles faster than the other mineral particles, depending upon the duration of treatment, the ozone concentration, and the kg O3/ton consumed by the treated ore, the surface of the iron sulfide particles may be partially or even totally oxidized, thus allowing better separation. As a consequence, the iron content is decreased, and the grade of the mineral value such as zinc, copper, and nickel increases. Also, sulfide emissions during heat treatment or further processing of the minerals are decreased due to decrease iron sulfide content.Type: ApplicationFiled: February 12, 2003Publication date: December 18, 2003Inventors: Javier Jara, Yawo Zuttah
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Publication number: 20030202931Abstract: Sulphides are prepared by combining a dithionite compound with an aqueous alkaline solution of an appropriate cation or mixture of cations. On heating the corresponding sulphides are precipitated. The dithionite compound may be a dithionite dianion which is produced as an intermediary when thiourea dioxide is used as a starting material in the solution. Examples of appropriate cations are zinc (as zinc acetate) and copper (as copper acetate). The precipitate is dried and subsequently fired to produce high quality sulphides which may be used as phosphors or other optoelectronic materials.Type: ApplicationFiled: April 26, 2002Publication date: October 30, 2003Inventors: Aron Vecht, Dominic Davies
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Publication number: 20030194365Abstract: The present invention relates to a method for labelling a sulfide compound with technetium or rhenium, comprising the reaction of a disulfide compound with pertechnetate or perrhenate in the presence of borohydride exchange resin to obtain a complex of technetium or rhenium with the sulfide compound. The method can directly label disulfide compounds with technetium or rhenium, can skip the synthetic step of thiol-protected S-precursor, and is useful for high value-added radiopharmaceuticals.Type: ApplicationFiled: September 24, 2002Publication date: October 16, 2003Inventors: Kyung Bae Park, Sang Hyun Park, Hui Jeong Gwon, Sun Ju Choi, Byung Chul Shin, Young Don Hong, Sang Mu Choi, Woong Woo Park, Kwang Hee Han, Beom Su Jang
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Publication number: 20030108829Abstract: A silver halide emulsion is disclosed, comprising at least one monovalent Au(I) complex coordinated with a compound represented by the following formula (1):Type: ApplicationFiled: March 1, 2002Publication date: June 12, 2003Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Hiroyuki Suzuki, Hirotomo Sasaki
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Patent number: 6565733Abstract: Method for the production of primary aluminium from alumina comprising the step of converting alumina into aluminium sulfide (Al2S3) and subsequently the separation of aluminium from aluminium sulfide wherein the conversion of alumina into aluminium sulfide is performed by reacting alumina with CS2 containing gas at a temperature Tal whereby the alumina is mainly &ggr;-alumina.Type: GrantFiled: December 17, 1999Date of Patent: May 20, 2003Assignee: Corus Aluminium Walzprodukte GmbHInventors: Heiko Sportel, Cornelis Wilhelmus Franciscus Verstraten