Utilizing Titanium Halide As Reactant Patents (Class 423/611)
  • Patent number: 9512151
    Abstract: A compound of Formula (II) and (III), or a mixture of any two or more thereof; wherein M is Ti or Zr; R3 at each occurrence is H, F, Cl, Br, I, CN, OR4, NR5R6, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted cycloalkylalkyl, unsubstituted heterocyclyl, or substituted or unsubstituted heterocyclylalkyl; R4 is H, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted cycloalkylalkyl, unsubstituted heterocyclyl, or substituted or unsubstituted heterocyclylalkyl; R5 and R6 are independently H, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted heterocyclylalkyl, or R5 and R6 may join to form a heterocyclic ring containing the N to which they are attached; and n?=0-4. Such compounds form optically transparent and/or clear films or particles or may be used to prepare such materials.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: December 6, 2016
    Assignee: AUTERRA, INC.
    Inventors: Kyle E. Litz, Partha Dutta, Sarah Lewis, Mark Rossetti, James Pawlson, Timothy Ullman, Giyana Amaratunga, Jennifer L. Vreeland, Tracey M. Jordan
  • Patent number: 9334174
    Abstract: Problem. Provided are a method for synthesizing spherical porous titanium oxide nanoparticles, which is easy to operate, does not take a long time for synthesis, and can easily adjust the particle diameter and the pore diameter of the spherical porous titanium oxide nanoparticles in accordance with the application thereof; spherical porous titanium oxide nanoparticles produced by the synthesizing method; and a gene gun carrier consisting of the spherical porous titanium oxide nanoparticles. Solution. A method for synthesizing spherical porous titanium oxide nanoparticles, includes: a step of reacting titanium isopropoxide and carboxylic acid in supercritical fluid, wherein the supercritical fluid is supercritical methanol, and the carboxylic acid is formic acid, acetic acid, benzoic acid, o-phthalic acid, fumaric acid, or maleic acid.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: May 10, 2016
    Assignee: KOCHI UNIVERSITY OF TECHNOLOGY
    Inventors: Kazuya Kobiro, Pengyu Wang, Takeshi Ohama
  • Patent number: 9272922
    Abstract: According to a method for producing an inorganic iodide in accordance with the present invention, it is possible to efficiently produce a highly pure inorganic iodide by reacting a hydrogen iodide gas with an inorganic base compound by bringing the hydrogen iodide gas into contact with the inorganic base compound. As such, it is possible to provide a simple and efficient method for producing an inorganic iodide.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: March 1, 2016
    Assignee: Nippoh Chemicals Co., Ltd.
    Inventors: Satoshi Kanbe, Kazumi Hosono, Masahiro Wada
  • Patent number: 9265701
    Abstract: A silver-colored pigment is provided having a nonmetallic platelet-shaped substrate and at least one ilmenite-containing coating, wherein the nonmetallic platelet-shaped substrate is a nonmetallic platelet-shaped synthetic substrate and the amount of iron compounds, calculated as elemental iron, in the pigment is less than 5.0 % by weight, based on the total weight of the pigment. Processes for preparing the pigment also are provided.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: February 23, 2016
    Assignee: ECKART GMBH
    Inventors: Michael Grüner, Thomas Schneider, Günter Kaupp, Christian Rummer, Dirk Schumacher
  • Patent number: 8932556
    Abstract: Ordered acicular aggregates of elongated TiO2 crystallites which resemble nano-sized flower bouquets and/or triangular funnels, and process for their preparation by thermally hydrolyzing a soluble TiO2 precursor compound in aqueous solution in the presence of a morphology controlling agent selected from carboxylic acids and amino acids.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 13, 2015
    Assignee: Cristal USA Inc.
    Inventors: Guoyi Fu, Mark B. Watson
  • Patent number: 8927441
    Abstract: Methods of forming rutile titanium dioxide comprise exposing a transition metal (such as V, Cr, W, Mn, Ru, Os, Rh, Ir, Pt, Ge, Sn, or Pb) to an atmosphere consisting of oxygen gas (O2) to produce an oxidized transition metal over an unoxidized portion of the transition metal. Rutile titanium dioxide is formed over the oxidized transition metal by atomic layer deposition. The oxidized transition metal is sequentially exposed to a titanium halide precursor and an oxidizer. Other methods include oxidizing a portion of a ruthenium material to ruthenium(IV) oxide using an atmosphere consisting of O2, nitric oxide (NO), or nitrous oxide (N2O); and introducing a gaseous titanium halide precursor and water vapor to the ruthenium(IV) oxide to form rutile titanium dioxide on the ruthenium(IV) oxide by atomic layer deposition. Some methods include exposing transition metal to an atmosphere consisting essentially of O2, NO, and N2O.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: January 6, 2015
    Assignee: Micron Technology, Inc.
    Inventors: Tsai-Yu Huang, Vishwanath Bhat, Vassil Antonov, Chris Carlson
  • Patent number: 8926938
    Abstract: A method of manufacturing crystalline titanium dioxide (TiO2) powder, a method of a negative active material, and a negative active material and a rechargeable lithium battery including the crystalline titanium dioxide (TiO2) powder are provided. The method of manufacturing the crystalline titanium dioxide powder may include: preparing a titanyl chloride (TiOCl2) aqueous solution by adding titanium tetrachloride (TiCl4) to water at a temperature ranging from 0° C. to 10° C.; adding alcohol, urea, and a sphere-shaping agent to the titanyl chloride aqueous solution to prepare a mixture; and hydrothermally synthesizing the mixture under a pressure ranging from 1.5 atm to 5 atm at a temperature ranging from 80° C. to 155° C.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: January 6, 2015
    Assignee: IUCF-HYU (Industry-University-Cooperation Foundation Hanyang University)
    Inventors: Yang-Kook Sun, Ce Jin, Hun-Gi Jung, Sung-Woo Oh
  • Publication number: 20140272414
    Abstract: Disclosed is a method of producing metal oxides, comprising electrodepositing a metal oxide from an electrolyte solution onto a substrate to coat at least a portion of the substrate, whereby metal oxide seed particles are released into the solution, and precipitating metal oxide particles from the solution. The precipitated metal oxide particles have a maximum particle size of less than 1 micron.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: PPG Industries Ohio, Inc.
    Inventors: Robin Peffer, Michael J. Pawlik, Jane Valenta
  • Patent number: 8791044
    Abstract: 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: Grant
    Filed: April 30, 2010
    Date of Patent: July 29, 2014
    Assignee: The United States of America as Represented by the Administrator of the U.S. Environmental Protection Agency
    Inventors: Rajender S. Varma, Babita Baruwati, Jurate Virkutyte
  • Patent number: 8765094
    Abstract: The present invention relates to a mesoporous titania bead and the preparation method thereof, wherein said mesoporous titania bead has a diameter of 200-1000 nm, specific surface area of 50-100 m2/g, porosity of 40-60%, pore radius of 5-20 nm, pore volume of 0.20-0.30 cm3/g, and the titania comprised in the bead is anatase titania.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: July 1, 2014
    Assignee: National Cheng Kung University
    Inventors: Jyh-Ming Ting, Chun-Ren Ke
  • Patent number: 8609553
    Abstract: Methods of forming rutile titanium dioxide. The method comprises exposing a transition metal (such as V, Cr, W, Mn, Ru, Os, Rh, Ir, Pt, Ge, Sn, or Pb) to oxygen gas (O2) to oxidize the transition metal. Rutile titanium dioxide is formed over the oxidized transition metal. The rutile titanium dioxide is formed by atomic layer deposition by introducing a gaseous titanium halide precursor and water to the oxidized transition metal. Methods of forming semiconductor structures having rutile titanium dioxide are also disclosed.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: December 17, 2013
    Assignee: Micron Technology, Inc.
    Inventors: Tsai-Yu Huang, Vishwanath Bhat, Vassil Antonov, Chris Carlson
  • Patent number: 8557217
    Abstract: A process for synthesizing nano-sized rutile, anatase, or a mixture of rutile and anatase TiO2 powder. The process includes the steps of: 1) forming a Ti-peroxo complex by mixing H2O2 with a Ti compound, and 2) heating the Ti-peroxo complex at a temperature of above 50° C. A primary particle size of TiO2 particles, synthesized by the method, is below 50 nm, and an agglomerated particle size thereof after a washing/dry process is below about 10 ?m. The major characteristics of the present invention are that it is a low temperature process, a highly concentrated synthesis, and high production yield of above 90%.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: October 15, 2013
    Assignee: Tokusen, U.S.A., Inc.
    Inventors: Insoo Kim, Woo Jin Lee, Young Jin Kim, Charles E. Smith, Jr.
  • Patent number: 8551909
    Abstract: A visible light activatable mesoporous titanium dioxide photocatalyst having a surface area of from 100 m2/g to 400 m2/g. The photocatalyst may have a rate of decomposition greater than 0.005 min?1. The photocatalyst may have a band gap width less than 2.95 eV. The photocatalyst may comprise undoped titanium dioxide or doped titanium dioxide. A hydrothermal process for synthesising a photocatalyst is also described.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: October 8, 2013
    Assignee: Dublin Institute of Technology Intellectual Property Ltd
    Inventors: Vinodkumar Etacheri, Surresh C. Pillai, John Colreavy
  • Publication number: 20130164532
    Abstract: The present invention relates to a mesoporous titania bead and the preparation method thereof, wherein said mesoporous titania bead has a diameter of 200-1000 nm, specific surface area of 50-100 m2/g, porosity of 40-60%, pore radius of 5-20 nm, pore volume of 0.20-0.30 cm3/g, and the titania comprised in the bead is anatase titania.
    Type: Application
    Filed: June 27, 2012
    Publication date: June 27, 2013
    Applicant: National Cheng Kung University
    Inventors: Jyh-Ming TING, Chun-Ren KE
  • Patent number: 8420046
    Abstract: Disclosed is a method of preparing high crystalline nanoporous titanium dioxide photocatalyst, capable of preparing the high crystalline nanoporous titanium dioxide photocatalyst in mass production through a simply synthesis method using an ultrasonification. The method includes the steps of (a) mixing a titanium precursor and a surfactant in a first solvent and performing a sol-gel reaction; (b) maturing a reactant obtained through the sol-gel reaction for 15 hours to 25 hours; (c) filtering the matured reactant and washing the matured reactant; (d) primarily drying the washed reactant at a temperature of 20° C. to 50° C. to obtain titanium sediments; (e) mixing the titanium sediments in a second solvent and performing an ultrasonification with respect to the mixed solution for 10 minutes to 120 minutes; and (f) secondarily drying the mixed solution, which has been subject to the ultrasonification, at a temperature of 15° C. to 45° C. to obtain titanium dioxide photocatalytic particles.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: April 16, 2013
    Assignee: Korea Basic Science Institute
    Inventors: Hae-Jin Kim, Jou-Hahn Lee, Soon-Chang Lee, Hyun-Uk Lee, Won-Ki Hong, Hye-Ran Kim, Jung-Hye Seo
  • Patent number: 8398954
    Abstract: It is disclosed a process for the production of titanium dioxide comprising the following steps: (a) a titanium ore containing iron, preferably ilmenite, is reacted with an aqueous NH4F solution; (b) the aqueous suspension thus obtained is filtered with consequent separation of a sludge fraction, which contains ammonium fluoroferrates, and a filtrate fraction, which contains ammonium fluorotitanates; (c) the filtrate fraction thus obtained is subjected to an hydrolysis reaction; (d) the thus-obtained solid component is subjected to a thermal hydrolysis reaction. The plant and the reactors for performing the above process are also disclosed.
    Type: Grant
    Filed: September 10, 2007
    Date of Patent: March 19, 2013
    Assignee: Breton Spa
    Inventor: Pavel S. Gordienko
  • Patent number: 8377414
    Abstract: This disclosure provides a process for preparing mesoporous amorphous hydrous oxide of titanium, comprising formation of a precipitate comprising an ionic porogen and a hydrolyzed compound comprising titanium from an aqueous mixture in the pH range of 5 to 10; and removing the ionic porogen from the precipitate to recover a mesoporous hydrous oxide of titanium, the ionic porogen being in sufficient amount and the conditions of precipitating being effective for producing a mesoporous hydrous oxide of titanium having a surface area of at least about 400 m2/g and a pore volume of at least 0.4 cc/g.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: February 19, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventor: Carmine Torardi
  • Patent number: 8295786
    Abstract: 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: Grant
    Filed: December 8, 2009
    Date of Patent: October 23, 2012
    Assignee: Sony Chemical & Information Device Corporation
    Inventors: Keisuke Aramaki, Junichiro Sugita, Morio Sekiguchi
  • Patent number: 8287837
    Abstract: A titanium-containing additive, a method for its production and methods of using the additive.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: October 16, 2012
    Assignee: Sachtleben Chemie GmbH
    Inventor: Djamschid Amirzadeh-Asl
  • Publication number: 20120202356
    Abstract: Methods of forming rutile titanium dioxide. The method comprises exposing a transition metal (such as V, Cr, W, Mn, Ru, Os, Rh, Ir, Pt, Ge, Sn, or Pb) to oxygen gas (O2) to oxidize the transition metal. Rutile titanium dioxide is formed over the oxidized transition metal. The rutile titanium dioxide is formed by atomic layer deposition by introducing a gaseous titanium halide precursor and water to the oxidized transition metal. Methods of forming semiconductor structures having rutile titanium dioxide are also disclosed.
    Type: Application
    Filed: February 7, 2011
    Publication date: August 9, 2012
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Tsai-Yu Huang, Vishwanath Bhat, Vassil Antonov, Chris Carlson
  • Patent number: 8106101
    Abstract: This invention relates to methods of making single phase nanocrystalline titanium dioxide. It is hereby provided a method for preparing single-phase anatase type titanium dioxide photocatalyst having a particle size of nano level at near room temperatures without the need for a sintering process at high temperatures.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: January 31, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventors: Walid Abdelhamld Daoud, John Haozhong Xin, Kaihong Qi
  • Patent number: 8101152
    Abstract: A titanium halide, preferably titanium tetrachloride, is reacted with suitable reductant, preferably an alkali metal or alkaline earth metal, under ultrasonic excitation in a liquid reaction medium to form nanometer size particles of titanium which may incorporate unreacted reductant. The nanosized titanium particles may be a precursor for nanosized titanium oxide which is formed by oxidizing the titanium, preferably with a low molecular weight alcohol. When the titanium particles incorporate unreacted reductant the oxidation reaction will yield nanometer sized titanates. The nanosized particles, whether titanium oxide or titanates may be extracted by first filtering them from the reaction medium, followed by washing with water to remove any water-soluble reaction products followed by spray drying.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: January 24, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Ion C. Halalay, Michael P. Balogh
  • Patent number: 8071070
    Abstract: Provided is a crystalline TiO2 powder in the form of aggregated primary particles having a variable sintering stability at a BET surface area of 70-100 m2/g and a rutile content of greater than 10% but less than or equal to 40%, and a process for preparing the crystalline TiO2 powder, which involves: introducing a TiCl4 vapor and, separately therefrom, H2 and a primary air into a mixing chamber to produce a gaseous mixture; igniting the gaseous mixture in a burner to produce a flame, which is burned into a reaction chamber to produce the crystalline TiO2 powder and gaseous substances; and separating the crystalline TiO2 powder from the gaseous substances, wherein the relative amounts of TiCl4 vapor, H2 and primary air are selected to provide crystalline TiO2 powder having the aforementioned BET surface area and rutile content, with the proviso that factor A has a value of 0.1-0.4 g/m2 in accordance within the following formula: factor A=105{[(TiCl4 vapor×H2)/(amount of air×gaseous mixture)]/BET]}.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: December 6, 2011
    Assignee: Evonik Degussa GmbH
    Inventors: Christian Schulze-Isfort, Kai Schumacher, Nina Schuhardt, Oswin Klotz, Rainer Golchert
  • Patent number: 8062622
    Abstract: A crystalline titanium dioxide powder, containing aggregated primary particles, wherein a BET surface area of the aggregated primary particles is from 30 to 65 m2/g, and a rutile content of a sum of crystalline modifications in the crystalline titanium dioxide is from of 50-70%.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: November 22, 2011
    Assignee: Evonik Degussa GmbH
    Inventors: Christian Schulze-Isfort, Oswin Klotz, Rainer Golchert, Uwe Diener, Kai Schumacher
  • Patent number: 8062621
    Abstract: A method of manufacturing titanium dioxide particles can produce titanium dioxide particles where a rare earth element is substituted at the titanium sites from which it is possible to highly efficiently take out fluorescence attributable to the rare earth element The method of manufacturing titanium dioxide particles doped with a rare earth element comprises a step of preparing a liquid precursor containing a titanium source and rare earth metal source, the doping ratio of the rare earth element in the liquid precursor being within a range not less than 0 at % and not more than 5.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: November 22, 2011
    Assignee: National Institute For Materials Science
    Inventors: Jiguang Li, Takamasa Ishigaki
  • Publication number: 20110269025
    Abstract: A method of manufacturing crystalline titanium dioxide (TiO2) powder, a method of a negative active material, and a negative active material and a rechargeable lithium battery including the crystalline titanium dioxide (TiO2) powder are provided. The method of manufacturing the crystalline titanium dioxide powder may include: preparing a titanyl chloride (TiOCl2) aqueous solution by adding titanium tetrachloride (TiCl4) to water at a temperature ranging from 0° C. to 10° C.; adding alcohol, urea, and a sphere-shaping agent to the titanyl chloride aqueous solution to prepare a mixture; and hydrothermally synthesizing the mixture under a pressure ranging from 1.5 atm to 5 atm at a temperature ranging from 80° C. to 155° C.
    Type: Application
    Filed: January 13, 2010
    Publication date: November 3, 2011
    Inventors: Yang-Kook Sun, Ce Jin, Hun-Gi Jung, Sung-Woo Oh
  • Patent number: 8048399
    Abstract: It is provided ultrafine particles of a rutile titanium oxide obtained by maintaining the pH of an aqueous solution of a titanium compound having a Ti concentration of from 0.07 to 5 mol/L in the range of ?1 to 3 in the presence of a chelating agent. Such ultrafine particles of a rutile titanium oxide are useful for photocatalysts, high refractive index materials, ultraviolet absorbing materials and the like.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: November 1, 2011
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Toyoharu Hayashi, Norio Nakayama, Tomonori Iijima
  • Patent number: 7988947
    Abstract: This invention pertains to mesoporous oxide of titanium and processes of making mesoporous oxide of titanium particularly crystalline oxide of titanium.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: August 2, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Carmine Torardi
  • Patent number: 7988780
    Abstract: A method of predicting photostability of coatings with various dopants on titanium dioxide pigment particles is disclosed. Calculations of the density of states show that a doped coating which reduces the density of states near the band edge or increases the density of states within the band gap of the pigment particles increases the photostability of the doped pigment.
    Type: Grant
    Filed: July 26, 2010
    Date of Patent: August 2, 2011
    Assignee: Kronos International Inc
    Inventors: Siegfried Bluemel, Lydia Drews-Nicolai
  • Patent number: 7935329
    Abstract: The present invention relates to a titania sol, a method of preparing the same, and a coating composition including the same. More specifically, it relates to a titania sol prepared by elevating the temperature of a reactant solution including a precursor of titania in a solvent for a reaction temperature, adding an acid catalyst to the reactant solution and conducting a sol-gel reaction while removing the solvent for reaction therefrom, and drying the prepared titania sol and re-dispersing the dried titania in a solvent for dispersion, a method of preparing the same, and a coating composition including the same.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: May 3, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Sang-Hyuk Im, Seung-Heon Lee, Young-Jun Hong, Won-Yong Choi
  • Patent number: 7932208
    Abstract: 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: Grant
    Filed: June 29, 2010
    Date of Patent: April 26, 2011
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Guoyi Fu, Billiejo M. Monk, Robert McIntyre
  • Patent number: 7910515
    Abstract: Silicon titanium mixed oxide powder having the following features: BET surface area of 5 to 300 m2/g, silica content, based on the total amount of the mixed oxide powder, of ?0.1 to <0.5% by weight, titanium dioxide content, based on the total amount of the mixed oxide powder, of ?99.0% by weight, sum of the proportions of silica and titanium dioxide, based on the total amount of the mixed oxide powder, ?99.5% by weight, titanium dioxide content of the primary particles comprising intergrown rutile and anatase phases, silica content of the primary particles amorphous, is prepared by allowing the vapours of one or more, in each case oxidizable and/or hydrolyzable titanium and silicon compounds to react in a high temperature zone with oxygen and/or steam, cooling the reaction mixture after the reaction and separating off the pulverulent solid from gaseous substances.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: March 22, 2011
    Assignee: Evonik Degussa GmbH
    Inventors: Reinhard Vormberg, Kai Schumacher
  • Publication number: 20110039103
    Abstract: The present invention refers to nanocrystalline spherical ceramic oxides, to the process for the synthesis and use thereof. These oxides, obtained by detonation of a water-in-oil emulsion (W/O), besides having a spherical morphology and nanocrystallinity, show a set of complementary features, namely a particle dimension inferior to 40 ?m, bimodal particle size distribution, high purity, deagglomeration and stable crystalline stages. This set of features makes these powders particularly suitable for several applications such as coating processes, near net shape processes and, when applied in ceramics industry, they provide dense and porous ceramic objects of exceptionally high mechanical resistance.
    Type: Application
    Filed: September 26, 2008
    Publication date: February 17, 2011
    Inventor: Joao Manuel CALADO DA SILVA
  • Patent number: 7858066
    Abstract: The disclosure provides a process for preparing nanocrystalline titanium dioxide, in particular rutile nanocrystalline titanium dioxide, comprising: (a) precipitating a mixture comprising hydrated titanium oxide and a separable filtering agent; (b) filtering the precipitated mixture to form a filter cake comprising the precipitated hydrated titanium dioxide and a separable filtering agent, (c) calcining the precipitated hydrated titanium oxide and separable filtering agent at a temperature of greater than about 300° C.; and (d) removing the separable filtering agent thereby recovering titanium dioxide particles.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: December 28, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Carmine Torardi
  • Patent number: 7846864
    Abstract: New types of photocatalyst materials are disclosed together with methods for preparing and using these materials, as well as air treatment systems incorporating such materials. The photocatalyst materials of this invention consist essentially of very small particles of a first-metal oxide, the first-metal being a metal that exhibits photo-induced semiconductor properties, having ions of a second-metal dispersed throughout its lattice structure, the second-metal being selected from the group of dopant metals. Such photocatalyst materials are prepared by the steps of mixing first-metal and second-metal precursors, removing nonessential ions from the mixture, drying the resulting product, and calcinating the dried product to produce the completed photocatalyst material.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: December 7, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Seok Ham, Son Ki Ihm, Joo Il Park, Kwang Min Choi, Kwang Eun Jeong
  • Publication number: 20100266486
    Abstract: This invention pertains to a process for producing ultra-fine rutile titanium dioxide powders. This particular compound is useful as UV-blocker in paints, plastics, coatings, pigments and sunscreens. The new process comprises the steps of providing a hot gas stream and of introducing therein firstly:—a titanium-bearing first reactant; and—a carbon- and/or nitrogen-bearing second reactant; the temperature of said gas stream being chosen so as to vaporize said first and second reactants, these being selected so as to form, at the prevalent temperature, titanium carbide, titanium nitride or a mixture thereof, as a nano-sized precursor; and, thereafter:—a volatile oxygen-bearing reactant selected so as to react with the nano-sized precursor, converting it to nano-sized titanium dioxide powder having a rutile content of at least 50%. This reaction scheme allows for the manufacture of powders with or without doping elements with a primary particle size between 1 and 100 nm.
    Type: Application
    Filed: November 4, 2008
    Publication date: October 21, 2010
    Inventors: Stijn Put, Yves Van Rompaey
  • Publication number: 20100266487
    Abstract: This disclosure relates to a process for making titanium dioxide in an anatase crystalline form which is stable at temperatures above 1000° C., comprising: precipitating a halide salt and a hydrolyzed compound comprising titanium from a reaction mixture comprising a titanium starting material selected from the group consisting of titanium tetrachloride, titanium oxychloride, and mixtures thereof, a base selected from the group consisting of ammonium hydroxide, ammonium carbonate, ammonium bicarbonate, tetramethyl ammonium hydroxide or tetraethyl ammonium hydroxide or mixture thereof, a solvent selected from the group consisting of ethanol, n-propanol, i-propanol, dimethyl acetamide, alcoholic ammonium halide and aqueous ammonium halide and mixtures thereof, a source of aluminum and a source of silicon to form a precipitate; and removing the halide salt from the precipitate to recover a oxide of titanium in a predominantly anatase crystalline form.
    Type: Application
    Filed: November 4, 2008
    Publication date: October 21, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventor: Carmine Torardi
  • Publication number: 20100226851
    Abstract: A process for synthesizing nano-sized rutile, anatase, or a mixture of rutile and anatase TiO2 powder. The process includes the steps of: 1) forming a Ti-peroxo complex by mixing H2O2 with a Ti compound, and 2) heating the Ti-peroxo complex at a temperature of above 50° C. A primary particle size of TiO2 particles, synthesized by the method, is below 50 nm, and an agglomerated particle size thereof after a washing/dry process is below about 10 ?m. The major characteristics of the present invention are that it is a low temperature process, a highly concentrated synthesis, and high production yield of above 90%.
    Type: Application
    Filed: September 11, 2007
    Publication date: September 9, 2010
    Inventors: Insoo Kim, Woo Jin Lee, Young Jin Kim, Charles E. Smith, JR.
  • Patent number: 7785560
    Abstract: Process for removing halide compounds adhering to finely divided metal oxide particles by means of steam, wherein the metal oxide particles are applied to the upper part of an upright column and migrate downwards by means of gravity, the steam is applied at the bottom end of the column, the metal oxide particles and the steam are fed counter-currently, the metal oxide particles freed of halide residues are removed at the base of the column, steam and halide residues are removed at the head of the column, wherein the column is heated in such a manner that the temperature difference Tbottom?Ttop between the lower part and the upper part of the column is at least 20° C. and a maximum temperature of 500° C. prevails in the column, and the metal oxide particles have a residence time in the column of from 1 second to 30 minutes.
    Type: Grant
    Filed: June 22, 2004
    Date of Patent: August 31, 2010
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Kai Schumacher, Juergen Flesch, Volker Hamm
  • Publication number: 20100196257
    Abstract: In order to provide nanoscale metal oxide fine particles having an excellent dispersibility in an organic solvent, metal oxide fine particles are obtained by heating and reacting metal halide and metal alkoxide in the presence of phosphine oxide. The heating is performed by microwave irradiation.
    Type: Application
    Filed: February 28, 2008
    Publication date: August 5, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Tetsushi Yamamoto
  • Patent number: 7763110
    Abstract: A method of predicting photostability of coatings with various dopants on titanium dioxide pigment particles is disclosed. Calculations of the density of states show that a doped coating which reduces the density of states near the band edge or increases the density of states within the band gap of the pigment particles increases the photostability of the doped pigment.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: July 27, 2010
    Assignee: Kronos International Inc
    Inventors: Siegfried Bluemel, Lydia Drews-Nicolai
  • Patent number: 7763232
    Abstract: The invention provides a method for the formation of small-size titanium oxide particles, comprising the steps of a) preparing a starting aqueous solution comprising at least one of titanic ions and complexes thereof, at a concentration of at least 0.1% w/w titanium; b) maintaining the solution at a temperature lower than 70° C. for a retention time in which hydrolysis takes place, the extent of the hydrolysis being sufficient to produce O.i mmol protons per mmol of titanium present in solution, wherein the time does not exceed 14 days, to form a system containing a retained solution; and c) adjusting the conditions in the system by at least one of the steps of: i) heating the retained solution to elevate the temperature thereof by at least 1° C.; ii) changing the pH of the retained solution by at least 0.1 units; and iii) diluting the retained solution by at least 20% whereby there are formed particles, wherein the majority of the particles formed are between about 2 nm and about 500 nm in size.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: July 27, 2010
    Assignee: Joma International AS
    Inventors: Asher Vitner, Aharon Eyal
  • Patent number: 7763565
    Abstract: 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: Grant
    Filed: August 31, 2007
    Date of Patent: July 27, 2010
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Guoyi Fu, BillieJo M. Monk, Robert McIntyre
  • Patent number: 7758844
    Abstract: There is provided a titanium oxide powder having excellent ultraviolet-protecting ability, usability and transparency, and a method of manufacturing the same. The titanium oxide powder provided is a porous titanium oxide powder that is formed from titanium oxide primary particles agglomerated together, has a mean particle diameter of 0.01 to 100 ?m, and has a specific surface area of 250 to 500 m2/g. The porous titanium oxide powder can be obtained by subjecting a titanium salt solution to hydrolysis by heating under the presence of an aliphatic alcohol and/or a substance having a carboxyl group or a carbonyl group, and then further carrying out heating treatment with an acid. The titanium oxide primary particles preferably have a mean particle diameter of 1 to 50 nm, and the powder preferably has an approximately spherical shape with the ratio of the minor axis to the major axis being at least 0.75.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: July 20, 2010
    Assignee: Shiseido Company, Ltd.
    Inventor: Shoichiro Shio
  • Patent number: 7731934
    Abstract: The invention relates to a novel form of titanium oxide. The titanium oxide is characterized in that it has the crystallographic structure of rutile with an orthorhombic lattice and a Pnmm space group, it has a platelet morphology, the platelets being of rectangular shape with a length between 3 and 10 nm, a width between 3 and 10 nm and a thickness of less than 1 nm and it has a specific surface area, determined by nitrogen adsorption/desorption, of 100 to 200 m2/g. Applications: self-cleaning glazing, photovoltaic cells.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: June 8, 2010
    Assignees: Universite Pierre et Marie Curie, Centre National de la Recherche Scientifique
    Inventors: Sophie Cassaignon, Jean-Pierre Jolivet, Magali Koelsch
  • Patent number: 7709540
    Abstract: The present invention belongs to a method for preparing organic ligand-capped titanium dioxide nanocrystals, wherein the method comprises steps of using methyl titanate, ethyl titanate, n-propyl titanate, iso-propyl titanate, butyl titanate or titanium tetrachloride as a titanium source, and with capping by oleic acid or an organic capping agent, reacting the titanium source in an organic non-polar solvent with an aqueous alkaline substance solution in the interface at a temperature of 25 to 280° C. for 0.5 to 240 hrs, thus a transparent sol containing titanium dioxide nanocrystals is obtained, said the titanium dioxide nanocrystals have particle diameters of 1-20 nm. The preparing process has the features of mild reaction conditions and is a simpler and easier method with a shorter preparation period, thereby facilitating the industrialization.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: May 4, 2010
    Assignee: Changchun Institute of Applied Chemistry Chines Academy of Sciences
    Inventors: Daocheng Pan, Nana Zhao, Qiang Wang, Xiangling Ji, Shichun Jiang, Lijia An
  • Patent number: 7686881
    Abstract: Flame-hydrolytically produced titanium dioxide powder that is present in the form of aggregates of primary particles, and has a BET surface of 20 to 200 m²/g, a half width (HW) [nm] of the primary particle distribution of HW = a×BETf where a = 670×10?9 m³/g and ?1.3 ≤ f ≤ ?1.0 and the proportion of particles with a diameter of more than 45 &mgr;m lies in a range from 0.0001 to 0.05 wt. %. The powder is produced by a process in which a titanium halide is vapourised at temperatures of less than 200°C.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: March 30, 2010
    Assignee: Degussa AG
    Inventors: Kai Schumacher, Andreas Schild, Martin Moerters
  • Patent number: 7687431
    Abstract: A nanotube-shaped titania having an aspect ratio of 6 or greater can be produced by anodizing a titanium metal or an alloy containing mainly titanium in an electrolyte solution containing a halogen atom-containing ion, such as a perchloric acid aqueous solution.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: March 30, 2010
    Assignees: Nippon Oil Corporation, Kanagawa Academy of Science and Technology
    Inventors: Keisuke Nakayama, Takaya Kubo, Yoshinori Nishikitani, Hideki Masuda
  • Publication number: 20090238747
    Abstract: The invention relates to a method for producing (semi)metal oxides and hydroxides, such as Si02, Ti02, Zr02, Zn0 and other (semi)metal salts such as BaSO4, which can be produced by emulsion precipitation in the form of nanoparticles from an aqueous solution. The invention also relates to the use of the same.
    Type: Application
    Filed: November 11, 2005
    Publication date: September 24, 2009
    Inventors: Matthias Koch, Ralf Anselmann
  • Patent number: 7591991
    Abstract: An anatase-type ultrafine particulate titanium oxide produced through a vapor-phase process, which has low chlorine content and exhibits excellent dispersibility as compared with conventional titanium oxide having a BET specific surface area comparable to that of the ultrafine particulate titanium oxide. When the ultrafine particulate titanium oxide is subjected to dechlorination, the titanium oxide satisfies the relation between BET surface area (B) and chlorine content (C) represented by the formula C?650e0.02B. The ultrafine particulate titanium oxide has a D90 of 2.5 (m or less as measured by means of laser diffraction particle size analysis. The present invention also provides a process for producing the ultrafine particulate titanium oxide.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: September 22, 2009
    Assignee: Showa Denko K.K.
    Inventors: Susumu Kayama, Jun Tanaka