In Fluidized Bed Patents (Class 423/614)
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Patent number: 8791044Abstract: Methods for preparing and using a photocatalyst are described. The catalyst is prepared by oxidation of a metal salt which has been doped in situ to form a photocatalyst active in visible light. The photocatalyst is used for degrading toxic and irritating compounds and infectious agents.Type: GrantFiled: April 30, 2010Date of Patent: July 29, 2014Assignee: The United States of America as Represented by the Administrator of the U.S. Environmental Protection AgencyInventors: Rajender S. Varma, Babita Baruwati, Jurate Virkutyte
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Patent number: 8295786Abstract: The present invention provides a magnetic sheet with improved resistance to folding while maintaining good magnetic characteristics and reliability; a method for producing the magnetic sheet; an antenna; and a portable communication device. A magnetic sheet of the present invention includes a flat magnetic powder, and a resin binder capable of dissolving in a solvent, wherein the magnetic sheet has a gradient of the content ratio of the magnetic powder to the resin binder in a thickness direction thereof, wherein, in use, the magnetic sheet is folded so that, of the front and back surfaces thereof, one surface whose magnetic powder content is lower than that of the other is folded inward, and wherein the difference in glossiness measured at a light-incident angle of 60° between the front and back surfaces is 9.4 or more.Type: GrantFiled: December 8, 2009Date of Patent: October 23, 2012Assignee: Sony Chemical & Information Device CorporationInventors: Keisuke Aramaki, Junichiro Sugita, Morio Sekiguchi
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Patent number: 8114377Abstract: This disclosure relates to process for producing titanium dioxide pigment having reduced chlorides, comprising: a) reacting titanium tetrahalide vapor, rutile-forming agent and at least a stoichiometric amount of oxygen in a reactor to form a gaseous suspension comprising titanium dioxide particles; b) introducing silicon tetrachloride into the reactor at least one point downstream of the point of contact of the titanium tetrahalide, the rutile forming agent and the oxygen, and where at least 97% of the titanium tetrahalide has been converted to titanium dioxide to provide a substantially uniform encapsulation of pyrogenic SiO2 on the titanium dioxide; c) passing the gaseous suspension to a cooling conduit; d) introducing scouring material, typically selected from the group of calcined titanium dioxide and compressed titanium dioxide, and mixtures thereof, into the cooling conduit; wherein the particles of the scouring material have a diameter in the range of about 0.25 mm to about 12.Type: GrantFiled: November 2, 2006Date of Patent: February 14, 2012Assignee: E.I. du Pont de Nemours and CompanyInventors: Alan Roger Eaton, Rajeev Lochan Gorowara, Narayanan Sankara Subramanian, Stephen William Taylor
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Patent number: 7932208Abstract: A method of preparing stable, transparent photocatalytic titanium dioxide sots is disclosed which involves thermal treatment of a suspension of amorphous titanium dioxide in the presence of certain alpha-hydroxy acids. The sots comprise titanium dioxide particles in the anatase form having a crystallite size less than about 10 nm and exhibit excellent stability and transparency at basic, neutral, and acid pH.Type: GrantFiled: June 29, 2010Date of Patent: April 26, 2011Assignee: Millennium Inorganic Chemicals, Inc.Inventors: Guoyi Fu, Billiejo M. Monk, Robert McIntyre
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Patent number: 7763565Abstract: A method of preparing stable, transparent photocatalytic titanium dioxide sols is disclosed which involves thermal treatment of a suspension of amorphous titanium dioxide in the presence of certain alpha-hydroxy acids. The sots comprise titanium dioxide particles in the anatase form having a crystallite size less than about 10 nm and exhibit excellent stability and transparency at basic, neutral, and acid pH.Type: GrantFiled: August 31, 2007Date of Patent: July 27, 2010Assignee: Millennium Inorganic Chemicals, Inc.Inventors: Guoyi Fu, BillieJo M. Monk, Robert McIntyre
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Patent number: 7615512Abstract: The invention relates to a titanium dioxide-based photocatalyst containing carbon that is highly photoactive in visible light (vlp-TiO2) and to a method of manufacture. The vlp-TiO2 is manufactured by mixing a fine grained titanium compount (BET?50 m2/g) with an organic carbon compound and subsequent thermal treatment at temperatures up to 350° C. The carbon content amounts to 0.05 to 4% by weight, preferably 0.4 to 0.8% by weight. The product is characterized by an ESR spectrum which displays only one significant signal in the g value range from 1.97 to 2.05 at g about 2.003. The inventive photocatalyst can be used for to degrade contaminants and pollutants in liquids and gases.Type: GrantFiled: April 1, 2005Date of Patent: November 10, 2009Assignee: Kronos International IncInventors: Jürgen Orth-Gerber, Horst Kisch
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Patent number: 7524793Abstract: The invention relates to a titanium dioxide-based photocatalyst containing carbon that is highly photoactive in visible light (vlp-TiO2) and to a method of manufacture. The vlp-TiO2 is manufactured by mixing a fine grained titanium compound (BET?50 m2/g) with an organic carbon compound and subsequent thermal treatment at temperatures up to 350° C. The carbon content amounts to 0.05 to 4% by weight, preferably 0.4 to 0.8% by weight. The product is characterized by an ESR spectrum which displays only one significant signal in the g value range from 1.97 to 2.05 at g about 2.003. The inventive photocatalyst can be used for to degrade contaminants and pollutants in liquids and gases.Type: GrantFiled: April 1, 2005Date of Patent: April 28, 2009Assignee: Kronos International IncInventors: Jürgen Orth-Gerber, Horst Kisch, Sakthivel Shanmugasundaram
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Patent number: 7468175Abstract: A high photosensitivity titanium oxide composition includes a plurality of nanosize particles including titanium dioxide and titanium suboxide. The particles are substantially non-stoichiometric (TiO2-x, wherein 0.1<×<0.3 at a surface of the particles, and in the bulk of the particles x is less than at the surface), having a magnetic susceptibility value (?) of at least 0.8·10?6 cm3/g at 300 K and being at least 30% by weight rutile. A related method of forming a high photosensitivity titanium oxide composition includes the steps of providing a titanium chloride compound, such as titanium tetrachloride, an oxygen-containing gas and hydrogen, wherein a concentration of the hydrogen is in a stoichiometric excess (H2:O2) from 2.02:1 to 2.61:1. The titanium chloride compound is burned in the presence of oxygen from the oxygen-containing gas and hydrogen to form plurality of ultrafine particles comprising titanium dioxide and titanium suboxide.Type: GrantFiled: March 15, 2007Date of Patent: December 23, 2008Assignee: Worthington Technologies, LLCInventors: Ihor Mykhaylovych Kobasa, Wojciech Jan Strus, Mykhaylo Andriyovych Kovbasa
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Patent number: 7413726Abstract: The present invention provides a low temperature process for the synthesis of ultrafine rutile phase titanium dioxide particles through vapor phase hydrolysis of titanium tetra chloride.Type: GrantFiled: March 26, 2004Date of Patent: August 19, 2008Assignee: Council of Scientific and Industrial ResearchInventors: Gerald D. Surender, Ani K. John, Kumara P. Rajendra Prasad, Savithri Sivaraman
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Patent number: 7381398Abstract: A titanium oxide powder holding a barium compound on the surface of the particles thereof is used for manufacturing a highly crystalline fine barium titanate powder by solid-phase reaction. When the titanium oxide powder and a barium-containing powder material are mixed and calcined to prepare the barium titanate powder, the barium compound on the surfaces of the titanium oxide powder particles inhibits the sintering, or the growth, of the titanium oxide during the calcination. Consequently, the resulting barium titanate powder is highly crystalline and fine.Type: GrantFiled: October 3, 2003Date of Patent: June 3, 2008Assignee: Murata Manufacturing Co., Ltd.Inventors: Syunsuke Nakaya, Masami Yabuuchi
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Patent number: 7371276Abstract: The titanium dioxide pigment of the present invention contains an anatase type crystal in an amount of 98-100% and has an average particle diameter of 0.2-0.4 ?m and a whiteness of 95-97 in terms of L value of linseed oil. The titanium dioxide pigment of the present invention has characteristics peculiar to anatase type, for example, optical characteristics such as bluish color tone and physical characteristics such as low hardness, and furthermore has high opacity which is not possessed by conventional anatase type titanium oxide pigments.Type: GrantFiled: August 6, 2003Date of Patent: May 13, 2008Assignee: Ishihara Sangyo Kaisha, Ltd.Inventors: Hideo Takahashi, Toshihiko Akamatsu, Kazuhiro Tominaga, Taku Katou, Yoshio Nagai, Yoshitaka Muraki, Yukako Ota
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Patent number: 6991677Abstract: Titanium dioxide-calcium carbonate composite particles capable of realizing characteristic properties inherent in titanium dioxide such as a high opacity, a process for producing the same, and a complex composition or complex incorporated with the same are provided. The composite particles were prepared by adding titanium dioxide particles having an average particle diameter of 0.1 to 0.5 ?m in a carbonation step, typically a step of introducing a gaseous mixture of carbon dioxide and air into a calcium hydroxide slurry with stirring, to conduct a carbonation, and continuing the reaction till pH of the slurry becomes 7 by continuous introduction of the gaseous mixture. Moreover, by incorporating the formed composite particles, complexes such as coatings and paints for paper making or composite materials such as paper, plastic molded materials, and rubber molded materials are produced.Type: GrantFiled: July 3, 2001Date of Patent: January 31, 2006Assignee: Nittetsu Mining Co., Ltd.Inventors: Katsuyuki Tanabe, Kouhei Mitsuhashi, Takehiko Yoshida
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Patent number: 6458452Abstract: The present invention relates to titanium oxide particles having an average particle size of not more than 0.3 &mgr;m, and a BET specific surface area of 15 to 200 m2/g, containing a soluble sodium salt of not more than 230 ppm, calculated as Na, and a soluble sulfate of not more than 150 ppm, calculated as SO4, and having a pH value of not less than 8. The titanium oxide particles of the present invention are suitable as non-magnetic particles for a non-magnetic undercoat layer of a magnetic recording medium which uses magnetic particles containing iron as a main ingredient, and even more particularly, are suitable as non-magnetic particles for a non-magnetic undercoat layer of a magnetic recording medium which uses magnetic particles containing iron as a main ingredient, show an excellent dispersibility in a binder resin, contain only a small amount of soluble sodium salt and soluble sulfate, and have a pH value of not less than 8.Type: GrantFiled: December 17, 1999Date of Patent: October 1, 2002Assignee: Toda Kogyo CorporationInventors: Kazuyuki Hayashi, Keisuke Iwasaki, Yasuyuki Tanaka, Hiroko Morii
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Patent number: 6277354Abstract: The present invention provides a process for recovering the chlorine value from a particulate feed stream of metal chlorides wherein the total energy and reactant mass flow are managed to minimize the build up of deposits of solids on the reactor walls and maximize the conversion of the metal chlorides to metal oxides and chlorine.Type: GrantFiled: June 10, 1999Date of Patent: August 21, 2001Assignee: E. I. duPont de Nemours and CompanyInventors: Aaron J. Becker, Stephan C. De La Veaux, James B. Dunson, Jr., Hans Hellmut Glaeser, Suhas Mahuli, Gary Ken Whiting
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Publication number: 20010014396Abstract: A process for producing an ultrafine mixed-crystal oxide characterized by producing an ultrafine mixed crystal oxide comprising primary particles in a mixed crystal state with a BET specific surface area of 10 to 200 m2/g, comprising the step of subjecting a halogenated metal to high temperature oxidation with an oxidizing gas to produce a metal oxide by a vapor phase production method, wherein said halogenated metal is in the form of a mixed gas (a mixed halogenated metal gas) comprising at least two compounds having a different metal elements selected from the group consisting of chlorides, bromides, and iodides of titanium, silicon, and aluminum, and said mixed halogenated metal gas and said oxidizing gas are independently preheated to 500° C. or more prior to a reaction, a ultrafine mixed crystal oxide obtained by the process, and use of the oxide.Type: ApplicationFiled: February 5, 2001Publication date: August 16, 2001Inventors: Jun Tanaka, Shinichiro Tomikawa
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Patent number: 5585078Abstract: In a process for chlorinating titanium containing material in a fluidized bed reactor which evolves gaseous material including CO, COS, and TiCl.sub.4, the improvement comprising introducing oxygen containing gas at a location or locations which are downstream of the surface of the bed, as measured in its static condition, to convert at least some CO to CO.sub.2 and some COS to CO.sub.2 and SO.sub.2.Type: GrantFiled: November 21, 1994Date of Patent: December 17, 1996Assignee: E. I. Du Pont de Nemours and CompanyInventors: Paul G. Reis, Melvyn B. Pell, David N. Low, Hans H. Glaeser
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Patent number: 5538708Abstract: In the process for producing titanium dioxide by (a) reacting titanium tetrachloride and oxygen in the vapor phase in a reactor to produce titanium dioxide, and (b) subsequently cooling the titanium dioxide by passing it through a flue consisting of a conventional flue, a finned flue, or combinations thereof, wherein the outlet for the reactor in step (a) has a smaller interior diameter than the inlet for the flue in step (b),the improvement comprising passing the titanium dioxide through a truncated cone-shaped finned flue conduit, the smaller diameter end of the truncated cone-shaped finned flue conduit receiving titanium dioxide produced by the reactor and the larger diameter end of the truncated cone-shaped finned flue conduit discharging titanium dioxide that is received by the flue.Type: GrantFiled: December 6, 1994Date of Patent: July 23, 1996Assignee: E. I. Du Pont de Nemours and CompanyInventors: Raul A. Gonzalez, Charles D. Musick
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Patent number: 5508015Abstract: A chloride process for producing TiO.sub.2 by addition of an inert gas in a vapor phase reaction of TiCl.sub.4 and an oxygen-containing gas is disclosed.Type: GrantFiled: July 15, 1994Date of Patent: April 16, 1996Assignee: E. I. Du Pont de Nemours and CompanyInventors: Raul A. Gonzalez, Charles D. Musick, James N. Tilton
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Patent number: 4937062Abstract: The present invention includes metal oxide foam particles and a method of making the same. A decomposable metal salt feed solution is injected into a hot atomizing gas. The mixture of hot atomizing gas and feed solution is maintained in the reactor until the feed solution converts to metal oxide foam particles. The metal oxide foam particles have a high specific surface area.Type: GrantFiled: March 7, 1988Date of Patent: June 26, 1990Assignee: Cabot CorporationInventors: Merrill Jordan, deceased, Steven R. Reznek, Matthew Neville, Brian A. Soucy, Bruce E. Mackay
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Patent number: 4455288Abstract: In a process for the production of titanium dioxide by the vapour phase oxidation of titanium tetrachloride in which process entrained inert particulate material is passed through equipment used to reduce or prevent the deposition of solids thereon, the quantity of inert particulate material entrained may be affected by the varying back pressure normally obtaining in the equipment. The control of this quantity may be improved by reducing pressure differences (by means of conduit 39) between the inlet (40) and outlet (36) of a mechanical feeding device (29, 30) for the solids. This entails the transmission of the pressure (from the conduit 26) into the solids delivery system 25(17) and this may be alleviated, optionally, by maintaining a head of solids in the system and/or by using a system of pressurized hoppers. The invention enables the quantity of inert particulate material used to be reduced.Type: GrantFiled: November 20, 1981Date of Patent: June 19, 1984Assignee: Laporte Industries LimitedInventors: David Salter, David Scott
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Patent number: 4426550Abstract: An improved multiwire conductor of the type which is mechanically stabilized by a tin based solder filler. A solder filled conductor is heated to a temperature above its melting point for a period long enough to allow a substantial amount of copper to be dissolved from the wires comprising the conductor. The copper forms the brittle intermetallic compound Cu.sub.5 Sn.sub.6 with tin in the solder. After cooling the conductor is flexed causing a random cracking of the solder, and thereby increasing the interwire resistance of the conductor. The subject invention is particularly adapted for use with braided, ribbon-type solder filled superconductors.Type: GrantFiled: March 15, 1982Date of Patent: January 17, 1984Assignee: The United States of America as represented by the United States Department of EnergyInventors: Thomas Luhman, Masaki Suenaga