Group Ib Metal (cu, Ag, Or Au) Patents (Class 423/604)
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Patent number: 6537510Abstract: One embodiment of the present invention provides a conductive pigment powder, which includes indium oxide, tin and gold, and having a purple color tone. Other embodiments of the present invention provide a method of producing a conductive pigment powder; a dispersion solution and a transparent conductive film, which include the above-mentioned conductive pigment powder; a method of forming a transparent conductive film; and a cathode ray tube, which includes the above-mentioned transparent conductive film and a transparent substrate.Type: GrantFiled: June 13, 2002Date of Patent: March 25, 2003Assignee: Mitsubishi Materials CorporationInventors: Toshiharu Hayashi, Hiroshi Yamaguchi, Daisuke Shibuta
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Patent number: 6517802Abstract: A chemical synthetic route for nanostructured materials that is scalable to large volume production, comprising spray atomization of a reactant solution into a precursor solution to form a nanostructured oxide or hydroxide precipitate. The precipitate is then heat-treated followed by sonication, or sonicated followed by heat treatment. This route yields nanostructured doped and undoped nickel hydroxide, manganese dioxide, and ytrria-stabilized zirconia. Unusual morphological superstructures may be obtained, including well-defined cylinders or nanorods, as well as a novel structure in nickel hydroxide and manganese dioxide, comprising assemblies of nanostructured fibers, assemblies of nanostructured fibers and agglomerates of nanostructured particles, and assemblies of nanostructured fibers and nanostructured particles. These novel structures have high percolation rates and high densities of active sites, rendering them particularly suitable for catalytic applications.Type: GrantFiled: September 15, 2000Date of Patent: February 11, 2003Assignees: The University of Connecticut, Rutgers, The State University of New JerseyInventors: Tongsan D. Xiao, Peter R. Strutt, Bernard H. Kear, Huimin Chen, Donald M. Wang
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Publication number: 20020136685Abstract: Stable copper hydroxide is prepared by removing ferrous ion from the beginning cupric solution. The ferrous ion is oxidized to ferric ion, and the ferric ion is precipitated by raising the pH of the solution to 3-4. The utilization of phosphate ion both increases the efficiency of oxidation and simultaneously precipitates ferric ion. A second raising the pH of the purified solution precipitates highly pure copper hydroxide that can be harvested.Type: ApplicationFiled: March 20, 2001Publication date: September 26, 2002Inventors: Julio Huato, Tetsuya Ogura
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Patent number: 6432871Abstract: A process for manufacturing a catalyst body for generating hydrogen having at least one thin, large-surface catalyst layer, through which the reaction mixture can be passed includes steps of pressing a copper powder (particularly dendritic copper) to form a thin and highly compressed layer which forms a formed body, sintering, the formed body in a reducing atmosphere so that a net-type carrier structure made of copper is formed, and activating a surface layer of the formed body.Type: GrantFiled: October 18, 1999Date of Patent: August 13, 2002Assignee: XCELLSIS GmbHInventors: Patrick Bachinger, Berthold Keppeler, Oskar Lamla, Bernd Schoenrock, Martin Schuessler, Dagmar Waidelich
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Publication number: 20020086209Abstract: The current invention relates to the preparation of an improved cathode active material for non-aqueous lithium electrochemical cell. In particular, the cathode active material comprises &egr;-phase silver vanadium oxide prepared by using a &ggr;-phase silver vanadium oxide starting material. The reaction of &ggr;-phase SVO with a silver salt produces the novel &egr;-phase SVO possessing a lower surface area than &egr;-phase SVO produced from vanadium oxide (V2O5) and a similar silver salt as starting materials. Consequently, the low surface area &egr;-phase SVO material provides an advantage in greater long term stability in pulse dischargeable cells.Type: ApplicationFiled: December 27, 2001Publication date: July 4, 2002Inventors: Esther S. Takeuchi, Marcus Palazzo
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Patent number: 6365766Abstract: Organohalosilanes are prepared by reacting an organic halide with metallic silicon particles in the presence of a metallic copper catalyst which is a metallic copper powder in flake form having a bulk specific gravity of 1-3 g/cm3 and a mean particle size of 10 &mgr;m to 1 mm as measured by laser diffraction particle size distribution analysis.Type: GrantFiled: April 12, 2000Date of Patent: April 2, 2002Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Mikio Aramata, Masaaki Furuya, Yoshihiro Shirota, Akio Muraida, Susumu Ueno, Toshio Shinohara
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Patent number: 6365555Abstract: A process for the preparation of nanostructured materials in high phase purities using cavitation is disclosed. The method comprises mixing a metal containing solution with a precipitating agent and passing the mixture into a cavitation chamber. The chamber consists of a first element to produce cavitation bubbles, and a second element that creates a pressure zone sufficient to collapse the bubbles. The process is useful for the preparation of mixed metal oxide catalysts and materials for piezoelectrics and superconductors.Type: GrantFiled: October 25, 1999Date of Patent: April 2, 2002Assignee: Worcester Polytechnic InstituteInventors: William R. Moser, Oleg V. Kozyuk, Josef Find, Sean Christian Emerson, Ivo M. Krausz
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Patent number: 6355821Abstract: Methods of forming metal alkoxides and methods of forming precursor solutions of metal alkoxides suitable for the coating of glass in the manufacture of electrochromic devices are disclosed. The method of forming metal alkoxides involves dissolving the metal halide in an anhydrous solvent and reacting it with an alcohol and (together with the addition of the alcohol or subsequently) adding an epoxide, and then evaporating-off the volatile components of the reaction product to leave a solid metal alkoxide that is substantially free of halide. The alkoxide may then be dissolved in a solvent including an alcohol (preferably ethanol) containing a small proportion of water to produce a precursor solution suitable for coating glass, the coating then being hydrolyzed to form a sol-gel and then baked to remove volatile components and to yield a thin layer of metal oxide.Type: GrantFiled: July 5, 2000Date of Patent: March 12, 2002Assignee: Sustainable Technologies Australia LimitedInventors: Andrew Joseph Koplick, Susan Marie Jenkins
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Patent number: 6346201Abstract: The invention provides an ozonated form of the compound tetrasilver tetroxide, a water disinfection method employing the ozonated tetrasilver tetroxide and compositions comprising the ozonated tetrasilver tetroxide. Examples of compositions of the invention include beverages, sterilants and disinfectants. In addition, the invention provides a method for increasing a half-life of ozone in water, where the method includes providing tetrasilver tetroxide in the water along with the ozone.Type: GrantFiled: April 5, 2000Date of Patent: February 12, 2002Assignee: ICF Technologies, Inc.Inventor: I. Cecil Felkner
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Publication number: 20020009414Abstract: Nanostructured materials and processes for the preparation of these nanostructured materials in high phase purities using cavitation is disclosed. The method preferably comprises mixing a metal containing solution with a precipitating agent and passing the mixture into a cavitation chamber. The chamber consists of a first element to produce cavitation bubbles, and a second element that creates a pressure zone sufficient to collapse the bubbles. The process is useful for the preparation of catalysts and materials for piezoelectrics and superconductors.Type: ApplicationFiled: January 16, 2001Publication date: January 24, 2002Inventors: William R. Moser, Oleg V. Kozyuk, Ivo M. Krausz, Sean Christian Emerson, Josef Find
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Publication number: 20010051103Abstract: A method for recycling copper oxide includes: a first step in which a sodium hydroxide aqueous solution is added to acidic copper chloride waste etchant produced in the PCB industry, to obtain copper hydroxide slurry; and a second step in which the slurry obtained in the first step is heated and sintered to thereby prepare a needle-form copper oxide. Since copper oxide has a purity of more than 99.0 wt % and the needle-form crystal morphology, so that it has an excellent filtering ability and homogeneous particle size distribution.Type: ApplicationFiled: January 24, 2001Publication date: December 13, 2001Inventors: Kyu Bum Seo, Young Sun Uh, Young Hee Kim, Jung Yoon Han, Sun Jin Kim, Myung Hun Kim
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Patent number: 6306795Abstract: Stable highly active supported copper based catalysts are comprised of copper oxide or elemental copper crystallites supported on mechanically stable aluminum oxide and are characterized by high surface area, small copper crystallite size, and high metal loading. The average crystallite size of the copper compound is from about 20 to about 300 Å, the copper loading is from about 10 to about 35 weight percent, the average particle diameter is from about 0.1 mm to about 10 mm, and the total surface area is from about 20 to about 400 square meters per gram. The catalysts are useful for hydration of nitriles to amides, especially hydration of acrylonitrile to acrylamide. The catalysts are distinguished by high mechanical stability, extended lifetime, and excellent resistance to hydration and copper leaching.Type: GrantFiled: September 7, 1999Date of Patent: October 23, 2001Assignee: Cytec Technology Corp.Inventors: Mark Donal Ryan, John Bradley Roucis, James Donald Carruthers
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Patent number: 6306494Abstract: Novel, fine particulate synthetic chalcoalumite, process for preparation thereof, and a heat insulating agent and agricultural film containing said fine, particulate synthetic chalcoalumite. The above objects are met by synthetic chalcoalumite represented by formula (1) below: (M12+)a−x(M22+)Al3+4(OH)b(An−)c. mH2O (1) (in which M12+ stands for Zn2+ or Cu2+, M22+ is at least one divalent metal ion selected from Ni2+, Co2+, Cu2+, Zn2+ and Mg2+, a is 0.3<a<2.0 (with the proviso that M1 and M2 are not the same), x is 0 ≦x<1.0, and x<a b is 10<b<14, An− is at least one selected from SO42−, HPO42−, CO32−, SO32−, HPO32−, NO3−, H2PO4−, Cl−, OH− and silicate ion, c is 0.4<c<2.Type: GrantFiled: July 23, 1999Date of Patent: October 23, 2001Assignee: Kyowa Chemical Industry Co LtdInventors: Hideo Takahashi, Akira Okada
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Patent number: 6294274Abstract: An object of the invention is to provide an oxide thin film which exhibits a widegap or transparency and p-type conductivity although it has heretofore been very difficult to form. The oxide thin film formed on a substrate contains copper oxide and strontium oxide as a main component and exhibits p-type conductivity at a bandgap of at least 2 eV.Type: GrantFiled: July 12, 1999Date of Patent: September 25, 2001Assignees: TDK CorporationInventors: Hiroshi Kawazoe, Hideo Hosono, Atsushi Kudo, Hiroshi Yanagi
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Publication number: 20010003579Abstract: The present invention provides a method of reducing copper oxide to improve its acid resistance comprising the step of reacting cupric oxide with a reducing agent selected from the group consisting of morpholine borane, ethylene diamine borane, ethylene diamine bisborane, t-butylamine borane, piperazine borane, imidazole borane, and methoxyethylamine borane to form cuprous oxide.Type: ApplicationFiled: May 11, 1998Publication date: June 14, 2001Inventors: JOSEPH A. CORELLA II, KEVIN M. NEIGH
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Patent number: 6218335Abstract: A porous spinel type oxide shows a large surface area and a uniform micro-porous structure. The oxide is expressed by general formula MO—Al2O3 and shows a surface area per unit weight of not less than 80 m2/g. Such a porous spinel type compound oxide is obtained by impregnating a specific &ggr;-alumina carrier with a solution of a compound of metal element M capable of taking a valence of 2, drying the impregnated carrier and calcining it at a temperature of 600° C. or higher. The specific &ggr;-alumina carrier shows a surface area per unit weight of not less than 150 m2/g, a micro-pore volume per unit weight of not less than 0.55 cm3/g and an average micro-pore diameter between 90 and 200 angstroms. The micro-pores with a diameter between 90 and 200 angstroms occupy not less than 60% of the total micro-pore volume of the carrier.Type: GrantFiled: July 23, 1999Date of Patent: April 17, 2001Assignee: Chiyoda CorporationInventors: Yoshimi Okada, Kenichi Imagawa, Susumu Yamamoto
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Patent number: 6197273Abstract: The invention provides a process for production of fine spherical particles of a carbonate or a hydroxide of nickel, cobalt or copper which comprises: dissolving a carbonate or a hydroxide of nickel, cobalt or copper having the general formula (I) M(CO3)x/2.(OH)y wherein M represents Ni, Co or Cu, and x and y are numerals satisfying the followings: 0≦x≦2, 0≦y≦2 and x+y=2, in aqueous ammonia, converting the resulting solution to a W/O emulsion containing droplets of the solution in a non-aqueous medium, and then removing volatile components including ammonia from within the droplets, thereby precipitating a basic carbonate or a hydroxide of a metal selected from nickel, cobalt and copperin the droplets.Type: GrantFiled: March 22, 2000Date of Patent: March 6, 2001Assignee: Sakai Chemical Industry Co., Ltd.Inventors: Kazuhiko Nagano, Kazunobu Abe, Shigefumi Kamisaka, Kiyoshi Fukai, Tsutomu Hatanaka, Shinji Ohgama, Hiroshi Nakao, Minoru Yoneda, Hideto Mizutani
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Patent number: 6127476Abstract: An aqueous adhesive composition, as for bonding rubber substrates together or for bonding a rubber substrate to a fabric, comprising a blend of a carboxylated rubber latex as made from styrene, butadiene, and an unsaturated acid monomer, and a natural rubber latex, is sulfur curable and desirably utilizes rubber accelerators. The adhesive composition is substantially free of hydrocarbon solvents and/or tackifiers and has good physical properties such as high peel strength.Type: GrantFiled: January 25, 1999Date of Patent: October 3, 2000Assignee: OMNOVA Solutions Inc.Inventors: Gary L. Jialanella, Raymond J. Weinert, Pamela L. Cadile, Norman K. Porter, Richard Olson
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Patent number: 6093236Abstract: Pelletized adsorbent compositions and methods of adsorbing toxic target compounds are provided for the destructive adsorption or chemisorption of toxic or undesired compounds. The pelletized adsorbents are formed by pressing together powder nanocrystalline particles comprising a metal hydroxide or a metal oxide at pressures of from about 50 psi to about 6000 psi to form discrete self-sustaining bodies. The pelletized bodies should retain at least about 25% of the surface area/unit mass and total pore volume of the starting metal particles.Type: GrantFiled: June 8, 1998Date of Patent: July 25, 2000Assignee: Kansas State University Research FoundationInventors: Kenneth J. Klabunde, Olga Koper, Abbas Khaleel
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Patent number: 6086845Abstract: An aqueous sodium carbonate solution is added in an equivalent amount to an aqueous silver nitrate solution (Ag=100 g/L) under stirring and, with nitric acid and sodium hydroxide being added to adjust the pH to 5.5-6.5, a silver carbonate precipitate is formed and subsequently washed thoroughly and dried at 250.degree. C. or below to produce a silver oxide powder, which satisfactory characteristics for use in cells, as exemplified by high water absorption, good shape of granules, high strength, non-stickiness to the molding punch, high fluidity and low residual carbon content. The pellet of the powder has high cell capacity.Type: GrantFiled: October 6, 1999Date of Patent: July 11, 2000Assignee: Dowa Mining Co., Ltd.Inventors: Hidekazu Kato, Shigetoshi Uchino, Kouki Toishi, Kenichi Harigae
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Patent number: 6086956Abstract: A composition for reducing a copper oxide layer to metallic copper so as to facilitate bonding a resin to the metallic copper is disclosed. The composition is an aqueous reducing solution containing a cyclic borane compound. Examples of such cyclic borane compounds include those having nitrogen or sulfur as a ring-forming member, such as morpholine borane, piperidine borane, pyridine borane, piperazine borane, 2,6-Iutidine borane, 4-methylmorpholine borane, and 1,4-oxathiane borane, and also N,N-diethylaniline borane.Type: GrantFiled: January 19, 1999Date of Patent: July 11, 2000Assignee: Morton International Inc.Inventors: John Fakler, Michael Rush, Scott Campbell
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Patent number: 6071486Abstract: A for producing metal oxide and/or organo-metal oxide compositions from metal oxide and organo-metal oxide precursors utilizing a rate modifying drying agent. The process allows metal oxide and/or organo-metal oxide compositions to be produced from a wide variety of metal oxide and organo-metal oxide precursors including metal halides and organometallic halides.Type: GrantFiled: April 9, 1997Date of Patent: June 6, 2000Assignee: Cabot CorporationInventors: Kenneth C. Koehlert, Douglas M. Smith, William C. Ackerman, Stephen Wallace, David J. Kaul
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Patent number: 6066590Abstract: The present invention is directed to a harmful gas removing agent used for removing harmful gas such as CO, NO.sub.x, and O.sub.3 from exhaust gases ventilated from automobile tunnels and underground parking, thereby preventing air pollution. The harmful gas removing agent, solving the problems of the conventional adsorbents and catalysts, is capable of efficiently removing NO.sub.x with no need of pre-treatment of adding O.sub.3 to the exhaust gas being treated, as well as being capable of satisfactorily removing CO and O.sub.3 from exhaust gases even at high humidity, and its removing activity lasts for a long time. Furthermore, the harmful gas removing agent can be regenerated by being exposed to hot air at relatively low temperature, thereby being repeatedly used, and is hard to be poisoned by SO.sub.x contained in the exhaust gas.Type: GrantFiled: March 26, 1998Date of Patent: May 23, 2000Assignee: Sued-Chemie Nissan Catalysts Inc.Inventors: Yuji Horii, Toshinori Inoue, Takeshi Yamashita, Hidetaka Shibano, Yoshiyuki Tomiyama, Kimihiko Yoshizaki
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Patent number: 6063344Abstract: A method of removing HMO.sub.2.sup.- anions from an aqueous silicate solution comprising contacting the solution with a cationic ion exchange resin, where M is manganese, zinc, copper, nickel, or a mixture thereof. The method is particularly applicable to solutions of sodium silicate or potassium silicate.Type: GrantFiled: June 1, 1999Date of Patent: May 16, 2000Assignee: Occidental Chemical CorporationInventors: Sharon D. Fritts, Walter Opalinski, Joseph Guzzetta
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Patent number: 6060422Abstract: A process for producing acrylic acid from propane and oxygen gas through a vapor-phase catalytic oxidation reaction, said process comprising conducting the reaction using as a catalyst a metal oxide containing metallic elements Mo, V, Sb, and A (provided that A is at least one element selected from the group consisting of Nb, Ta, Sn, W, Ti, Ni, Fe, Cr, and Co). The metal oxide is prepared by a process including specific steps (1) and (2). The metal oxide may be supported on a compound containing specific elements.Type: GrantFiled: June 24, 1999Date of Patent: May 9, 2000Assignee: Toagosei Co., Ltd.Inventors: Mamoru Takahashi, Xinlin Tu, Toshiro Hirose, Masakazu Ishii
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Patent number: 6030600Abstract: An aqueous sodium carbonate solution is added in an equivalent amount to an aqueous silver nitrate solution (Ag=100 g/L) under stirring and, with nitric acid and sodium hydroxide being added to adjust the pH to 5.5-6.5, a silver carbonate precipitate is formed and subsequently washed thoroughly and dried at 250.degree. C. or below to produce a silver oxide powder, which satisfactory characteristics for use in cells, as exemplified by high water absorption, good shape of granules, high strength, non-stickiness to the molding punch, high fluidity and low residual carbon content. The pellet of the powder has high cell capacity.Type: GrantFiled: November 4, 1997Date of Patent: February 29, 2000Assignee: Dowa Mining Co., Ltd.Inventors: Hidekazu Kato, Shigetoshi Uchino, Kouki Toishi, Kenichi Harigae
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Patent number: 6004469Abstract: A process for the decomposition of hydrogen peroxide wherein aqueous streams containing 1 to 500,000 ppm H.sub.2 O.sub.2 are contacted with a Mn/Cu catalyst component on a monolith carrier to eliminate the H.sub.2 O.sub.2 by decomposition to water and oxygen.Type: GrantFiled: January 28, 1998Date of Patent: December 21, 1999Assignee: Advanced Catalyst Systems, Inc.Inventors: Michele W. Sanders, Larry E. Campbell
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Patent number: 5985790Abstract: This invention relates to a process for producing an enhanced adsorbent particle comprising contacting a non-amorphous, non-ceramic, crystalline, porous, calcined, aluminum oxide particle that was produced by calcining at a particle temperature of from 400.degree. C. to 700.degree. C., with an acid for a sufficient time to increase the adsorbent properties of the particle. A process for producing an enhanced adsorbent particle comprising contacting a non-ceramic, porous, oxide adsorbent particle with an acid for a sufficient time to increase the adsorbent properties of the particle is also disclosed. Particles made by the process of the instant invention and particle uses, such as remediation of waste streams, are also provided.Type: GrantFiled: October 21, 1996Date of Patent: November 16, 1999Assignee: Project Earth Industries, Inc.Inventors: Mark L. Moskovitz, Bryan E. Kepner
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Patent number: 5958362Abstract: The present method is to produce an active material powder formed of a spinel oxide containing lithium or a layer-structured oxide containing lithium for a lithium secondary battery which is uniform in composition, fine in particle size and free of oxygen defects, and which is unlikely to cause capacity deterioration resulted from repetitive charge/discharge cycles at a high current density.A suspension 1 prepared by suspending an ingredient of the active material powder in a combustible liquid or an emulsion prepared by emulsifying a solution of the ingredient in the combustible liquid is sprayed in a droplet state 15 together with an oxygenic gas 2. The combustible liquid contained in the droplet 15 is burned to have the ingredient therein reacted and to evaporate the solvent. As a result, active material powder 4 formed of the spinel oxide containing lithium is obtained.Type: GrantFiled: March 27, 1997Date of Patent: September 28, 1999Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Kazumasa Takatori, Naoyoshi Watanabe, Toshihiko Tani, Tsuyoshi Sasaki, Akio Takahashi, Masahiko Kato, Akihiko Murakami
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Patent number: 5948726Abstract: The invention relates to a method for producing an adsorbent and/or catalyst and binder system comprising I) mixing components comprising (a) a binder comprising a colloidal metal oxide or colloidal metalloid oxide, (b) an oxide adsorbent and/or catalyst particle, and (c) an acid, (ii) removing a sufficient amount of water from the mixture to cross-link components a and b to form an adsorbent and/or catalyst and binder system. The invention also relates to particles made by the process, binders, and methods for remediating contaminants in a stream.Type: GrantFiled: October 21, 1996Date of Patent: September 7, 1999Assignee: Project Earth Industries, Inc.Inventors: Mark L. Moskovitz, Bryan E. Kepner
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Patent number: 5891945Abstract: A production method of a magnesium hydroxide solid solution, Mg.sub.1-x M.sup.2+ .sub.x (OH).sub.2 or a resin and/or rubber material having as its effective elements containing said solid solution as its flame retardant, characterized by having M.sup.2+ distributed unevenly in a high concentration in the vicinity of the surface of each crystal, in the magnesium solid represented by the formula Mg.sub.1-x M.sup.2+ .sub.x (OH).sub.2 wherein M.sup.2+ is at least one divalent metal ion selected from the group consisting of Mn.sup.2+, Fe.sup.2+, Ni.sup.2+, Cu.sup.2+, Zn.sup.2+ and x indicates a range of 0.001.ltoreq.x<0.5.Type: GrantFiled: March 26, 1997Date of Patent: April 6, 1999Assignee: Tateho Chemical Industries, Co., Ltd.Inventors: Shigeo Miyata, Mitsuru Koresawa, Yasunori Kitano, Hirofumi Kurisu, Toshikazu Kotani, Kiminari Tottotsu
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Patent number: 5874374Abstract: A method for producing engineered materials from salt/polymer aqueous solutions in which an aqueous continuous phase having at least one metal cation salt is mixed with a hydrophilic organic polymeric disperse phase so as to form a metal cation/polymer gel. The metal cation/polymer gel is then treated to form a structural mass precursor, which structural mass precursor is heated, resulting in formation of a structural mass having predetermined characteristics based upon the intended application of the structural mass.Type: GrantFiled: September 8, 1997Date of Patent: February 23, 1999Assignee: Institute of Gas TechnologyInventor: Estela Ong
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Patent number: 5861136Abstract: The invention is directed to a method for the manufacture of fully dense, finely divided, spherical particles of copper I oxide with controlled particle size distribution. The invention is further directed to a method for the manufacture of finely divided, spherical particles of copper I oxide with controlled particle size distribution.Type: GrantFiled: April 21, 1997Date of Patent: January 19, 1999Assignee: E. I. du Pont de Nemours and CompanyInventors: Howard David Glicksman, Toivo Tarmo Kodas, Diptarka Majumdar
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Patent number: 5861133Abstract: A synthetic chalcoalumite compound represented by the formula (1)(Zn.sub.a-x.sup.2+ M.sub.x.sup.2+)Al.sub.4.sup.3+ (OH).sub.b (A.sup.n-).sub.c.mH.sub.2 O (1)whereinM.sup.2+ represents at least one of Cu, Ni, Co and Mg;a represents 0.3<a<2.0;x represents 0.ltoreq.x<1.0;b represents 10<b<14;A.sup.n- represents one or two selected from SO.sub.4.sup.2-, HPO.sub.4.sup.2-, CO.sub.3.sup.2-, CrO.sub.4.sup.2-, SiO.sub.3.sup.2-, NO.sub.3.sup.2-, OH.sup.- and Cl.sup.- ;c represents 0.4<c<2.0 andm represents a number of 1 to 4,and a process for the production thereof.Type: GrantFiled: March 3, 1997Date of Patent: January 19, 1999Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Akira Okada, Kanako Shimizu, Kazushige Oda
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Patent number: 5855862Abstract: A method for preparing an oxide (P), which includes the steps of (i) forming a solid phase compound (O) based on an oxide containing molecular entities (1) chosen from optionally substituted ammonium, diammonium, diazan-ium or diazandium, the entities being distributed within the solid matrix, and (ii) eliminating the entities (1) from the solid phase compound (O) by reacting the solid phase compound (O) with a gaseous stream containing a break-down reactant for the entities (1), and isolating the resulting solid material (P).Type: GrantFiled: January 8, 1997Date of Patent: January 5, 1999Assignee: Rhone-Poulenc ChimieInventors: Jean-Claude Grenier, Jean-Pierre Doumerc, Stephane Petit
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Patent number: 5846912Abstract: The present invention relate to textured YBa.sub.2 Cu.sub.3 O.sub.x (Y-123) superconductors and a process of preparing them by directional recrystallization of compacts fabricated from quenched YBCO powders at temperatures about 100.degree. C. below the peritectic temperature to provide a superconductor where more than 75% of the YBa.sub.2 Cu.sub.3 O.sub.x phase is obtained without any Y.sub.2 BaCuO.sub.5 .Type: GrantFiled: January 4, 1996Date of Patent: December 8, 1998Assignee: Lockheed Martin Energy Systems, Inc.Inventors: Venkat Selvamanickam, Amit Goyal, Donald M. Kroeger
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Patent number: 5840267Abstract: A method for producing a metal oxide powder which comprises heating a metal or metals in an atmosphere gas comprising a halogen gas, a hydrogen halide gas or a mixture of these gases in a concentration of from 0.5% by volume or more to 99.5% by volume or less; and oxygen, water vapor or a mixture of these gases in a concentration of from 0.5% by volume or more to 99.5% by volume or less.Type: GrantFiled: June 27, 1996Date of Patent: November 24, 1998Assignee: Sumitomo Chemical Co., Ltd.Inventor: Kunio Saegusa
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Patent number: 5779784Abstract: A pigmentary material comprises silver in a lattice of crystalline zirconia, which material contains at least 0.4% by weight of the silver. A process for preparing a pigmentary material comprising silver in a lattice of crystalline zirconia comprises calcining a zirconium component which yields the zirconia, and a silver component which yields the silver, forming a calcination mixture of the resultant zirconium and silver moieties and cooling the mixture, the weight of fluoride compound in the total weight of the components to be calcined being less than 6%.Type: GrantFiled: September 23, 1996Date of Patent: July 14, 1998Assignee: Cookson Matthey Ceramics & Materials LimitedInventors: Desmond G. Eadon, Pamela Wood
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Patent number: 5750087Abstract: The present invention provides a method of reducing copper oxide to improve its acid resistance comprising the step of reacting cupric oxide with a reducing agent selected from the group consisting of morpholine borane, ethylene diamine borane, ethylene diamine bisborane, t-butylamine borane, piperazine borane, imidazole borane, and methoxyethylamine borane to form cuprous oxide.Type: GrantFiled: June 27, 1996Date of Patent: May 12, 1998Assignee: Mine Safety Appliances CompanyInventors: Joseph A. Corella, II, Kevin M. Neigh
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Patent number: 5742070Abstract: A method for preparing an active substance for use in a positive electrode in chemical cells comprising a negative electrode is described. The method comprises preparing a mixed aqueous solution of a water-soluble lithium compound, a water-soluble transition metal compound, and an organic acid selected from the group consisting of organic acids having, in the molecule, at least one carboxyl group and at least one hydroxyl group and organic acids having at least two carboxyl groups, preparing an organic acid complex comprising lithium and a transition metal, and thermally decomposing the complex at temperatures sufficient for the decomposition to obtain the active substance. The complex may be prepared by dehydrating the solution. Alternatively, the complex may be formed by spraying the solution under heating conditions.Type: GrantFiled: June 3, 1996Date of Patent: April 21, 1998Assignee: Nippondenso Co., Ltd.Inventors: Yasushi Hayashi, Norikazu Adachi, Hisanao Kojima
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Patent number: 5707438Abstract: A composite cuprous oxide powder is provided comprising at least about 80% by weight of cuprous oxide particles and substantially the balance cupric oxide adhering to cuprous oxide particles. The composite cuprous oxide powder is produced by surface oxidizing cuprous oxide particles to form a black coating or layer thereon. The composite powder is produced by subjecting particles of cuprous oxide to surface oxidation at a temperature ranging from about 400.degree. F. to less than about 900.degree. F. for a time period sufficient to surface oxidize the particles of cuprous oxide and produce a black coating thereon of cupric oxide. The method is applicable to the production of black pigment grade cuprous oxide powder.Type: GrantFiled: February 21, 1996Date of Patent: January 13, 1998Assignee: American Chemet CorporationInventor: John N. Carlton
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Patent number: 5698483Abstract: A process for producing nano size powders comprising the steps of mixing an aqueous continuous phase comprising at least one metal cation salt with a hydrophilic organic polymeric disperse phase, forming a metal cation salt/polymer gel, and heat treating the gel at a temperature sufficient to drive off water and organics within the gel, leaving as a residue a nanometer particle-size powder.Type: GrantFiled: March 17, 1995Date of Patent: December 16, 1997Assignee: Institute of Gas TechnologyInventors: Estela T. Ong, Vahid Sendijarevic
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Patent number: 5674815Abstract: An oxide superconductor composed of Cu, O and M (M is Ba, Sr and/or Ca) and including alternately arranged at least one rock-salt structure section and at least one infinite layer structure section, wherein the rock-salt structure section consists of two atomic layers each consisting of O and M and each having an atomic ratio O/M of 1 or less, and the infinite layer structure section consists of alternately arranged, first and second atomic layers. Each of the first atomic layers consists of O and Cu and has an atomic ratio O/Cu of 2, while each of the second atomic layers consists of the element M. The infinite layer structure section may consist of only one first atomic layer.Type: GrantFiled: March 6, 1996Date of Patent: October 7, 1997Assignees: International Superconductivity Technology Center, Matsushita Electric Industrial Co., Ltd.Inventors: Seiji Adachi, Hisao Yamauchi, Shoji Tanaka, Nobuo Mouri
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Patent number: 5637258Abstract: A process for the production of metal oxide nanocrystalline phosphors activated with a rare earth, line emitting, element. The nanocrystal oxides are produced by a sol-gel like process. The process begins with an n-butoxide solution of the host and activator which is first subject to acetolysis which will cause the pH of the solution to change from basic to acidic. This is followed by the addition of water in a hydrolysis step which forms a host/activator hydroxide solution. To the host/activator hydroxide solution, sodium hydroxide, which is very basic, is added, which will cause the precipitation of host oxide nanocrystals activated with the activator. The host/activator n-butoxide precursors may be synthesized by azeotropic distillation.Type: GrantFiled: March 18, 1996Date of Patent: June 10, 1997Assignee: Nanocrystals Technology L.P.Inventors: Efim T. Goldburt, Rameshwar N. Bhargava, Bharati S. Kulkarni
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Patent number: 5635154Abstract: Disclosed herein is a process for producing fine metal oxide particles comprising the step of heat-treating an aqueous solution of a metal salt at a temperature of not lower than 200.degree. C. under a pressure of not less than 160 kg/cm.sup.2 for 1 second to 1 hour so as to bring into the decomposition reaction of said metal salt.Type: GrantFiled: May 23, 1995Date of Patent: June 3, 1997Assignee: Nissan Chemical Industries Ltd.Inventors: Kunio Arai, Tadafumi Ajiri
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Patent number: 5578551Abstract: The present invention is a controlled vapor/solid reaction process for the synthesis of samples of bulk compositions with a structure defined by the homologous series HgBa.sub.2 Ca.sub.n-1 Cu.sub.n O.sub.2n+2+.delta. [Hg-12(n-1)n] with n=2, 3, . . . with up to 75 to 90% Hg-1212 and 65 to 75% Hg-1223 by volume, which display sharp superconducting transitions up to 135 K.Type: GrantFiled: July 28, 1993Date of Patent: November 26, 1996Assignee: University of HoustonInventors: Ching-Wu Chu, Ruling Meng, Y. Q. Wang
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Patent number: 5571520Abstract: The employment of molecular crystals as bactericidal, viricidal and algicidal devices, and specifically the molecular semiconductor crystal tetrasilver tetroxide Ag.sub.4 O.sub.4 which has two trivalent and two monovalent silver atoms per molecule, and which through this structural configuration generates electronic activity on a molecular scale capable of killing algae and bacteria via the same mechanism as macroscale electron generators.Type: GrantFiled: August 4, 1994Date of Patent: November 5, 1996Assignee: Antelman Technologies Ltd.Inventor: Marvin S. Antelman
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Patent number: 5565688Abstract: A method for preparing an active substance for positive electrode in non-aqueous electrolytic secondary cells making use of a lithium or lithium alloy negative electrode is described. The method comprises providing an amorphous citrate complex of lithium and a transition metal and firing the complex at a predetermined temperature to obtain an active substance. The citrate complex is obtained by preparing an aqueous mixed solution of lithium hydroxide or carbonate, a water-soluble transition metal salt and citric acid and dehydrating the mixed solution to obtain an amorphous citrate complex. The complex is then fired at a temperature ranging from 300.degree. to 900.degree. C. to obtain an active substance.Type: GrantFiled: September 21, 1994Date of Patent: October 15, 1996Assignee: Nippondenso Co., Ltd.Inventor: Yasushi Hayashi
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Patent number: 5563117Abstract: In the production of a 124-type or 123-type superconductor by a sol-gel method using alkoxides of respective metals, the use of a compound wherein a secbutoxy group and a hydroxy group are coordinated with a copper atom gives a superconductor composed of flat particles having a broad C plane. The dimensional ratio defined by l/d is at least 6.7 in the case of the 124-type or is at least 8.4 in the case of the 123-type. It shows a superconducting property at a liquid nitrogen temperature. This superconductor shows a higher critical current density than one obtained by a sintering method.Type: GrantFiled: December 15, 1994Date of Patent: October 8, 1996Assignees: Kyocera Corporation, International Superconductivity Technology Center, Sanyo Electric Co., Ltd.Inventors: Shinichi Koriyama, Takaaki Ikemachi, Hisao Yamauchi
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Patent number: 5527765Abstract: A high temperature superconductor and composite structure. A superconductor is disposed on a silver substrate without interdiffusion. The superconductor is formed by heating to a temperature not exceeding the peritectic point of the superconductor material, providing an oxidizing atmosphere while not exceeding the melting point of silver and disposing the superconductor on the silver substrate.Type: GrantFiled: August 23, 1994Date of Patent: June 18, 1996Assignee: Illinois Superconductor CorporationInventors: James D. Hodge, Lori J. Klemptner