Alkali Metal Containing (li, Na, K, Rb, Or Cs) Patents (Class 423/332)
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Publication number: 20110009254Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools.Type: ApplicationFiled: July 9, 2010Publication date: January 13, 2011Applicant: Ivoclar Vivadent AGInventors: Marcel Schweiger, Volker Rheinberger, Harald Burke, Wolfram Holand, Elke Apel, Christian Ritzberger, Dmitri Brodkin
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Patent number: 7867464Abstract: A process for the reversible storage of hydrogen, comprising bringing an alloy of alkaline metal and silicon into contact with gaseous hydrogen leading to the formation of the hydride or corresponding hydrides, comprises the use of at least one balanced system that corresponds to the formula: MXMSi?MXMSiHn ?where M is selected from among Li, Na, or K and in which atomic ratios XM take on the following values: XLi=1 1?XNa?3 1?XK?2 ?n is the number of hydrogen atoms corresponding to the stoichiometry of the hydride or formed hydrides. or to the formula MSiXSi?MSiXSiH2XSi+1 ?where M is selected from among Li, Na, or K and in which the atomic ratio XSi=Si/M takes on a value of 1 to 4.Type: GrantFiled: June 8, 2009Date of Patent: January 11, 2011Assignee: IFP Energies NouvellesInventors: Pascal Raybaud, François Ropital
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Patent number: 7851513Abstract: A process for producing aqueous silica-based sols, having an S value from 15 to 25%, mole ratio Si:Al from 20:1 to 50:1, mole ratio Si:X, where X=alkali metal, from 5:1 to 17:1, SiO2 content of at least 5% by weight and containing silica-based particles having a specific surface area of at least 300 m2/g, are disclosed wherein a cationic ion exchange resin having part of its ion exchange capacity in hydrogen form is contacted with an aqueous alkali metal silicate to form a slurry having a pH from 5.0 to 11.5 and/or having particle aggregation or microgel formation corresponding to a S value up to 45%; adjusting the pH using a material comprising an aluminium compound; and separating the resin from the slurry. Further, the use of such silica-based sols in producing paper is disclosed.Type: GrantFiled: November 20, 2009Date of Patent: December 14, 2010Assignee: Akzo Nobel N.V.Inventors: Johan Nyander, Glenn Mankin
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Patent number: 7776473Abstract: A silicon-silicon oxide-lithium composite comprises a silicon-silicon oxide composite having such a structure that silicon grains having a size of 0.5-50 nm are dispersed in silicon oxide, the silicon-silicon oxide composite being doped with lithium. Using the silicon-silicon oxide-lithium composite as a negative electrode material, a lithium ion secondary cell having a high initial efficiency and improved cycle performance can be constructed.Type: GrantFiled: March 22, 2007Date of Patent: August 17, 2010Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Mikio Aramata, Koichiro Watanabe, Satoru Miyawaki, Meguru Kashida, Hirofumi Fukuoka
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Patent number: 7771686Abstract: An inorganic polymer which comprises one or more organic functional groups and which has the following empirical formula: Rm[M2O]x[Al2O3]y[SiO2]zXqPH2O, in which: R represents an organic functional group; M is an alkali metal; X is selected from chlorine and fluorine; m is >0; q is ?0; x is from 1 to 1.6; y is from 1.0; x/y is from 1.0 to 1.6; z is from 3 to 65; z/y is ?1.0; and P is from 3 to 5.Type: GrantFiled: December 2, 2004Date of Patent: August 10, 2010Assignee: Commonwealth Scientific and Industrial Research OrganisationInventors: Kwesi Kurentsir Sagoe-crentsil, Luqian Weng, Alan Harry Taylor
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Publication number: 20100135887Abstract: This invention is intended to modify, detoxify, or effectively use, as cordierite, a silicate-containing fibrous material. A silicate-containing fibrous material is modified into a low-expansion and heat-resistant cordierite compound by treating a silicate-containing fibrous material with a modifier for a silicate-containing fibrous material comprising an aqueous alkaline solution mainly composed of alkali silicate comprising an ammonium ion, a halide ion, a boron ion, and an aluminum ion.Type: ApplicationFiled: May 14, 2007Publication date: June 3, 2010Inventor: Toshinori Morizane
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Patent number: 7670585Abstract: Provided is a method for preparing an electroconductive mayenite type compound with good properties readily and stably at low cost without need for expensive facilities, a reaction at high temperature and for a long period of time, or complicated control of reaction. A method for preparing an electroconductive mayenite type compound comprises a step of subjecting a precursor to heat treatment, wherein the precursor contains Ca and/or Sr, and Al, a molar ratio of (a total of CaO and SrO:Al2O3) is from (12.6:6.4) to (11.7:7.3) as calculated as oxides, a total content of CaO, SrO and Al2O3 in the precursor is at least 50 mol %, and the precursor is a vitreous or crystalline material; and the method comprises a step of mixing the precursor with a reducing agent and performing the heat treatment of holding the mixture at 600-1,415° C. in an inert gas or vacuum atmosphere with an oxygen partial pressure of at most 10 Pa.Type: GrantFiled: November 30, 2007Date of Patent: March 2, 2010Assignees: Asahi Glass Company, Limited, Tokyo Institute of TechnologyInventors: Hideo Hosono, Katsuro Hayashi, Sung Wng Kim, Masahiro Hirano, Satoru Narushima, Setsuro Ito
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Patent number: 7662354Abstract: The present invention relates to use of an aluminosilicate particle for deodorization, wherein the aluminosilicate particle has the composition of: s M(1)xOy t M(2)2O.Al2O3 u SiO2 v RmQn w H2O, wherein M(1) is one or more members selected from the group consisting of Ag, Cu, Zn and Fe, M(2) is one or more members selected from the group consisting of Na, K and H, R is one or more members selected from the group consisting of Na, K, Ca and Mg, Q is one or more members selected from the group consisting of CO3, SO4, NO3, and Cl, s satisfies 0<s?3, and t satisfies 0?t?3, with proviso that s+t is from 0.5 to 3, and u satisfies 0.5?u?6, v satisfies 0<v?2, w satisfies w?0, x satisfies 1?x?2, y satisfies 1?y?3, m satisfies 1?m?2, and n satisfies 1?n?3, and wherein the aluminosilicate particle has a specific surface area of 1 m2/g or more and less than 70 m2/g.Type: GrantFiled: August 6, 2004Date of Patent: February 16, 2010Assignee: Kao CorporationInventor: Kazuo Oki
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Patent number: 7655207Abstract: An aluminum complex hydroxide salt having Al oxide octahedral layers and a divalent anion among the octahedral layers, wherein an aluminosilicate anion expressed by the following general formula (1), [NapAlqSirOz]2???(1) wherein p, q, r and z are positive numbers satisfying, 5?z?20, z=(p/2)+(3q/2)+2r+1, 0<p/q<1, 0.01?q/r?1 is, at least, contained as the divalent anion. The aluminum complex hydroxide salt can be favorably used as a compounding agent for resins, and exhibits excellent heat retaining property as well as excellent transparency particularly when it is mixed as a heat retaining agent into films for agricultural use.Type: GrantFiled: April 19, 2007Date of Patent: February 2, 2010Assignee: Mizusawa Chemicals, Ltd.Inventor: Madoka Minagawa
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Publication number: 20090317319Abstract: The present invention provides methods of utilizing biomass materials, in which biomass materials are mixed directly with the reactants and the biomass materials while in combustion can directly heat up the reactants to the temperature required for the chemical reaction to take place. Such chemical reaction takes advantage of the heat energy, carbon element and/or silicon element that are inherently contained within biomass materials. For instance, biomass materials produce powdery or lumpy alkali metal silicates when chemically reacting with alkali metal compounds, synthesize black powder when reacting with nitrates, redox sulfates and decompose carbonates, etc. The present invention is characterized with high heat utilization, no need for external heat source, low power consumption, greatly reduced equipment costs, and the significantly simplified process.Type: ApplicationFiled: February 15, 2007Publication date: December 24, 2009Inventor: Caidong Qin
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Patent number: 7622097Abstract: A method is provided for treating silica sand scrubs (SSS) generated and accumulated as waste in the chloride manufacturing process of titanium dioxide pigment. A hydrothermal process is used to produce sodium silicate solutions of modulus 3.0 to 3.8, and precipitated silicas. In some embodiments, the process uses two specific principal reaction stages. A sodium silicate solution having a low SiO2:Na2O molar ratio, in the range from 2.0 to 2.8, is first produced by reaction of the SSS, as a cost-effective SiO2 source, with aqueous caustic soda. The conversion of this intermediate sodium silicate solution of low modulus to a high SiO2:Na2O molar ratio is made possible by using a SiO2 source that is prepared as precipitated amorphous silica from the intermediate sodium silicate solution produced above.Type: GrantFiled: July 20, 2007Date of Patent: November 24, 2009Assignee: The National Titanium Bioxide Co., Ltd. (CRISTAL)Inventors: Fadi Mohammed Saeed Trabzuni, Hassan Moenes El Dekki, Chathangat Cheroolil Gopalkrishnan
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Publication number: 20090263307Abstract: An improved process for producing high purity silicon results from the reaction of sodium with pure silicon tetrafluoride gas, which produces sodium fluoride as a by-product. The silicon tetrafluoride gas is formed by decomposing sodium fluorosilicate. The sodium fluorosilicate is produced by precipitation when fluorosilicic acid (FSA) is reacted with the by-product sodium fluoride in closed loop process. Likewise, the fluorosilicic acid is preferably formed at high purity using a source material that consists essentially of silica by reacting the by-product sodium fluoride with an acid to create reactive fluoride ions.Type: ApplicationFiled: April 17, 2009Publication date: October 22, 2009Applicant: CIRCULON HUNGARY LTD.Inventors: Leonard Nanis, Shi Yuan, Matthew Sakae Forkin
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Patent number: 7601318Abstract: A method for the synthesis of compounds of the formula C—LixM1?yM?y(XO4)n, where C represents carbon cross-linked with the compound LixM1?yM?y(XO4)n, in which x, y and n are numbers such as 0?x?2, 0?y?0.6, and 1?n?1.5, M is a transition metal or a mixture of transition metals from the first period of the periodic table, M? is an element with fixed valency selected among Mg2+, Ca2+, Al3+, Zn2+ or a combination of these same elements and X is chosen among S, P and Si, by bringing into equilibrium, in the required proportions, the mixture of precursors, with a gaseous atmosphere, the synthesis taking place by reaction and bringing into equilibrium, in the required proportions, the mixture of the precursors, the procedure comprising at least one pyrolysis step of the carbon source compound in such a way as to obtain a compound in which the electronic conductivity measured on a sample of powder compressed at a pressure of 3750 Kg·cm?2 is greater than 10?8 S·cm?1.Type: GrantFiled: September 21, 2001Date of Patent: October 13, 2009Assignees: Hydro-Quebec, CNRS, Universite de MontrealInventors: Michel Armand, Michel Gauthier, Jean-Francois Magnan, Nathalie Ravet
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Patent number: 7598194Abstract: It is aimed at providing an oxynitride powder, which is suitable for usage as a phosphor, is free from coloration due to contamination of impurities, and mainly includes a fine ?-sialon powder. An oxynitride powder is produced by applying a heat treatment in a reducing and nitriding atmosphere, to a precursor compound including at least constituent elements M, Si, Al, and O (where M is one element or mixed two or more elements selected from Li, Mg, Ca, Sr, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), thereby decreasing an oxygen content and increasing a nitrogen content of the precursor.Type: GrantFiled: April 22, 2005Date of Patent: October 6, 2009Assignee: National Institute for Materials ScienceInventors: Naoto Hirosaki, Takayuki Suehiro
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Patent number: 7578988Abstract: The invention relates to a process for preparing a silicate of an element chosen from alkali metals, alkaline-earth metals or rare earths, comprising a reaction between silica and a sulfate of said element in a reactor equipped with at least one submerged burner within a molten mass, said submerged burner being fed with a gas containing oxygen, an excess of fuel/reducing agent being introduced into the reactor relative to the oxygen effectively consumed. The process allows the reaction to be carried out satisfactorily and at relatively low temperature.Type: GrantFiled: September 7, 2004Date of Patent: August 25, 2009Assignee: Saint-Gobain Glass FranceInventors: Remi Jacques, Pierre Jeanvoine, Biagio Palmieri, Melanie Rattier
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Patent number: 7538068Abstract: A carbon dioxide gas absorbent includes a porous body containing a lithium complex oxide. The porous body includes pores having a pore diameter distribution such that main pores which consist of first pores with a diameter of 10 to 100 ?m and second pores with a diameter larger than 100 ?m and 500 ?m or smaller occupy 80 to 100%, third pores with a diameter smaller than 10 ?m occupy 0 to 10% and fourth pores with a diameter larger than 500 ?m occupy 0 to 10%, the main pores have a pore diameter distribution such that the first pores occupy 15 to 85% and second pores occupy 15 to 85%.Type: GrantFiled: March 16, 2006Date of Patent: May 26, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Masahiro Kato, Toshihiro Imada, Kenji Essaki
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Patent number: 7538067Abstract: A silica xerogel, a process for making it, and a process for using it to reduce chill haze in beer includes incorporation in the xerogel of one or more alkali metals, optionally in combination with one or more alkaline earth metals. The pH of the xerogel is between 8.0 and 10.5, preferably between 8.5 and 10.0.Type: GrantFiled: May 14, 2007Date of Patent: May 26, 2009Assignee: PQ CorporationInventors: Yatao Hu, Larissa Ding, Robert E. Patterson
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Patent number: 7527778Abstract: A process is disclosed for preparing a zinc-containing molecular sieve having IFR framework topology and having zinc atoms in its crystal framework, said process comprising: (a) preparing an aqueous mixture containing sources of silicon oxide, zinc oxide, an alkali metal, and an N-benzyl-1,4-diazabicyclo[2.2.2]octane cation having an anionic counterion which is not detrimental to the formation of the molecular sieve; and (b) maintaining the aqueous mixture under conditions sufficient to form crystals of the molecular sieve.Type: GrantFiled: June 7, 2007Date of Patent: May 5, 2009Assignee: Chevron U.S.A. Inc.Inventor: Cong-Yan Chen
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Publication number: 20090081550Abstract: To curb a decline in the high-rate performance of non-aqueous electrolyte secondary batteries and improve safety at the time of an internal short circuit, a non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte wherein the positive electrode includes a positive electrode active material capable of absorbing and desorbing lithium ions, the positive electrode active material includes a secondary particle, and the secondary particle is an aggregate containing primary particles and a silicon oxide. The primary particles contain a lithium nickel composite oxide. The silicon oxide is present in at least grain boundaries between the primary particles.Type: ApplicationFiled: September 16, 2008Publication date: March 26, 2009Inventors: Toshihiro INOUE, Ryuichi Kuzuo, Hideo Sasaoka
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Publication number: 20090069605Abstract: A catalyst composition for use in manufacturing methacrolein by reacting with one of isobutene and t-butanol, the catalyst composition being represented by the formula of: x (Mo12Bi8FebCocAdBeOf)/y Z. Mo12BiaFebCocAdBeOf is an oxide compound. Z is a catalyst carrier is one of graphite, boron, silicon, germanium powder, and a mixture thereof Mo, Bi, Fe, Co, and O are chemical symbols of molybdenum, bismuth, iron, cobalt, and oxygen respectively. A is one of W, V, Ti, Zr, Nb, Ni, and Re. B is one of K, Rb, Cs, Sr, and Ba. The catalyst is adapted to not only enhance the production of methacrolein with high activeness and high selectivity but also effectively control the heat point of the catalyst during the methacrolein manufacturing process to prolong the catalyst life.Type: ApplicationFiled: November 7, 2007Publication date: March 12, 2009Inventors: Yan Zhuang, Chunlei Zhang, Xin Wen, Jun Li, Jingming Shao, Peizhang Zhang
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Publication number: 20090045136Abstract: The invention relates to a combined process for the adsorption of metals in a liquid and for the neutralisation of metal-containing waste acids. The adsorption material used in the process is in the form of a geological mineral containing at least one alkali metal and/or alkaline earth metal, e.g. wollastonite (CaSiO3) , magnesite (MgCO3) or burnt magnesite (MgO). The spent adsorption material that has been used in the adsorption process is thereafter used as neutralisation agent for the neutralisation of waste acids, such as spent pickling baths. The application moreover relates to an adsorption material comprising a geological mineral containing at least one alkali metal and/or alkaline earth metal, which mineral has been concentrated by crushing, milling and shake sieving in a dry state.Type: ApplicationFiled: March 3, 2006Publication date: February 19, 2009Inventor: Rob Hellingwerf
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Publication number: 20090022646Abstract: A method is provided for treating silica sand scrubs (SSS) generated and accumulated as waste in the chloride manufacturing process of titanium dioxide pigment. A hydrothermal process is used to produce sodium silicate solutions of modulus 3.0 to 3.8, and precipitated silicas. In some embodiments, the process uses two specific principal reaction stages. A sodium silicate solution having a low SiO2:Na2O molar ratio, in the range from 2.0 to 2.8, is first produced by reaction of the SSS, as a cost-effective SiO2 source, with aqueous caustic soda. The conversion of this intermediate sodium silicate solution of low modulus to a high SiO2:Na2O molar ratio is made possible by using a SiO2 source that is prepared as precipitated amorphous silica from the intermediate sodium silicate solution produced above.Type: ApplicationFiled: July 20, 2007Publication date: January 22, 2009Applicant: The Titanium Dioxide Co. Ltd. (CRISTAL)Inventors: Fadi Mohammed Saeed Trabzuni, Hassan Moenes El Dekki, Chathangat Cheroolil Gopalkrishnan
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Patent number: 7479264Abstract: A method for producing synthetic magadiite, including the step of: heating a liquid aqueous colloidal silica suspension, the liquid aqueous colloidal silica suspension having a mole ratio of sodium hydroxide to silica and a mole ratio of water to silica effective to produce a synthetic magadiite wherein more than fifty percent by weight of the synthetic magadiite is platy synthetic magadiite. The synthetic platy magadiite can be converted to the acid form and: (a) heated to produce quartz-like plates; or Coalkylated to produce an organophilic material. In another aspect the instant invention is a method for the production of platy sodium octasilicate which includes the step of: heating a liquid aqueous colloidal silica dispersion containing silica, sodium oxide, and water, the mole ratio of the silica to the sodium oxide being in the range of from about 3.5 to about 10.Type: GrantFiled: January 24, 2006Date of Patent: January 20, 2009Assignee: The Dow Chmeical CompanyInventors: Juan M. Garces, Steven R. Lakso, Brian J. Schoeman
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Patent number: 7465520Abstract: Cathode materials having an improved electronic conductivity allowing for faster kinetics in the electrochemical reaction, as well as higher conductivity to meet the power requirements for many consumer applications, especially at low temperatures. The cathode material comprises a compound from the family of compounds where the basic unit is generally represented by LixNi0.5TiOPO4. The structure of LixNi0.5TiOPO4 includes corner sharing octahedra [TiO6] running along the C-axis. The structure is such that nearly three Li atoms are being inserted in LixNi0.5TiOPO4. A cell in accordance with the principles of the present invention is rechargable and demonstrates a high capacity of lithium intercalation and fast kinetics.Type: GrantFiled: June 2, 2004Date of Patent: December 16, 2008Assignee: UChicago Argonne LLCInventors: Ilias Belharouak, Khalil Amine
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Publication number: 20080302997Abstract: A snow-melting/antifreezing agent which comprises potassium silicate as an active ingredient and a snow-melting/antifreezing agent which comprises potassium silicate and a nitrite salt as active ingredients are disclosed. These snow-melting/antifreezing agents may optionally further contain an alkali metal salt and/or a lower alcohol. These snow-melting/antifreezing agents are safe for the environment and do not cause concrete to deteriorate. They not only have excellent capability to melt snow and ice and to prevent freezing, but also have high profitability and are easy to handle.Type: ApplicationFiled: June 30, 2005Publication date: December 11, 2008Applicant: ABC Research Lab. for Building Material Co.,Ltd.Inventors: Teruo Oota, Hayato Asai, Takehiko Fukazawa
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Publication number: 20080286186Abstract: A composite oxide catalyst for the oxidation of an olefin containing Mo and Bi as essential components, characterized in that it has a specific surface area of 5 to 25 m2/g and a pore volume of 0.2 to 0.7 cc/g, and has a pore diameter distribution wherein the volume of the pores having a pore diameter of 0.03 to 0.1 ?m accounts for 30% or more of the total pore volume, the volume of the pores having a pore diameter of 0.1 to 1 ?m accounts for 20% or more of the total pore volume, and the volume of the pores having a pore diameter of less than 0.Type: ApplicationFiled: December 5, 2007Publication date: November 20, 2008Inventors: Isao Teshigahara, Nariyasu Kanuka, Tomoatsu Iwakura
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Patent number: 7448231Abstract: The invention relates to a process for manufacturing compounds based on one or more silicates of alkali metals and/or of alkaline-earth metals, optionally in the form of mixed silicates that combine at least two of these elements, said process involving: (i) preferably a conversion reaction (1) in which halides of said alkali metals and/or of said rare earths and/or of said alkaline-earth metals are converted into the corresponding sulfates; (iii) a conversion reaction (2) in which said sulfates together with silica are converted into the corresponding silicates, the heat supply needed for this conversion being provided, at least in part, by a combustion reaction (3) using a submerged burner or a plurality of submerged burners.Type: GrantFiled: October 4, 2002Date of Patent: November 11, 2008Assignee: Saint-Gobain Glass FranceInventors: Pierre Jeanvoine, Arnaud Le Verge
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Patent number: 7442356Abstract: To provide a process for producing inorganic spheres having a substantially uniform particle size with high productivity. In a process for producing inorganic spheres, which comprises a step of injecting an alkaline aqueous liquid containing an inorganic compound into a laminar flow of an organic liquid containing a surfactant through micropores to form a W/O type emulsion, and a step of solidifying droplets of the aqueous liquid containing an inorganic compound in the W/O type emulsion by an acid to form inorganic spheres, as the organic liquid, one which is brought into contact with an acid in a state of the W/O type emulsion or after separated from the W/O type emulsion, or one which is brought into contact with the aqueous liquid and then separated and recovered, is used.Type: GrantFiled: November 14, 2005Date of Patent: October 28, 2008Assignee: Asahi Glass Company, LimitedInventors: Toshiya Matsubara, Masaharu Tanaka, Hajime Katayama, Kenji Yamada
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Patent number: 7357910Abstract: Method for producing metal oxide nanoparticles. The method includes generating an aerosol of solid metallic microparticles, generating plasma with a plasma hot zone at a temperature sufficiently high to vaporize the microparticles into metal vapor, and directing the aerosol into the hot zone of the plasma. The microparticles vaporize in the hot zone into metal vapor. The metal vapor is directed away from the hot zone and into the cooler plasma afterglow where it oxidizes, cools and condenses to form solid metal oxide nanoparticles.Type: GrantFiled: July 15, 2002Date of Patent: April 15, 2008Assignee: Los Alamos National Security, LLCInventors: Jonathan Phillips, Daniel Mendoza, Chun-Ku Chen
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Patent number: 7335342Abstract: In the present invention a process for the preparation of sodium silicate from Kimberlite tailing generated as solid waste during diamond mining is disclosed. The process comprises, reacting Kimberlite tailing with mineral acid to remove acid soluble impurities followed by digesting acid treated Kimberlite tailing with alkali solution in a open or closed system to obtain sodium silicate useful for commercial applications.Type: GrantFiled: March 14, 2006Date of Patent: February 26, 2008Assignee: Council of Scientific and Industrial ResearchInventors: Raksh Vir Jasra, Hari Chand Bajaj, Rajesh Shantilal Somani, Haresh Mahipatlal Mody, Jatin Rameshchandra Chunawala, Devendra Lalijibhai Ghelani, Hemal Narendrakumar Ranpara, Dipti Jivanbhai Barochiya, Suresh Chandra, Maharaj Kishan Dhar, C. Kesava Rao, Kamlesh Kumar
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Patent number: 7314843Abstract: The invention relates to a process for synthesis of lamellar solids based on silicates comprising: i) a mixing stage, during which a mixture that comprises an alkaline metal, a silica source, water and an organic structuring agent is prepared, and ii) a crystallization stage during which this mixture is kept under conditions allowing the formation of a crystalline solid. The organic structuring agent that is used in this process comprises an alcohol group and an amine group that are separated by a hydrocarbon chain.Type: GrantFiled: January 31, 2005Date of Patent: January 1, 2008Assignee: Institut Francais du PetroleInventors: Eva Barea, Vicente Fornes, Avelino Corma, Patrick Bourges, Emmanuelle Guillon
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Patent number: 7297318Abstract: Methods for the removal of lead from a metal silicate during the process of manufacturing of such a material are provided. With the reliance upon lower cost starting silicon dioxide starting materials that are known to exhibit elevated amounts of heavy metal therein for the purpose of producing metal silicates (such as sodium silicate, as one example), it has been realized that removal of significant amounts of such heavy metals is necessary to comply with certain regulatory requirements in order to provide a finished material that exhibits the same low level of heavy metal contamination as compared with finished materials that are made from more expensive, purer starting silicon dioxides. Two general methods may be followed for such decontamination purposes. One entails the introduction of a calcium phosphate material, such as dicalcium phosphate, tricalcium phosphate, and/or hydroxyapatite, to a formed metal silicate solution but prior to filtering.Type: GrantFiled: November 17, 2005Date of Patent: November 20, 2007Assignee: J.M. Huber CorporationInventors: Yung-Hui Huang, John V. Offidani
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Patent number: 7285260Abstract: Method of synthesis for a material made of particles having a core and a coating and/or being connected to each other by carbon cross-linking, the core of these particles containing at least one compound of formula LixM1?yM?y(XO4)n, in which x,y and n are numbers such as 0?x?2, 0?y?0.6 and 1?n?1.5, M is a transition metal, M? is an element with fixed valency, and the synthesis is carried out by reaction and bringing into equilibrium the mixture of precursors, with a reducing gaseous atmosphere, in such a way as to bring the transition metal or metals to the desired valency level, the synthesis being carried out in the presence of a source of carbon called carbon conductor, which is subjected to pyrolysis. The materials obtained have excellent electrical conductivity as well as very improved chemical activity.Type: GrantFiled: September 21, 2001Date of Patent: October 23, 2007Assignees: Hydro Quebec, CNRS, Universite de MontrealInventors: Michel Armand, Michel Gauthier, Jean-Francois Magnan, Nathalie Ravet
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Publication number: 20070224508Abstract: A silicon-silicon oxide-lithium composite comprises a silicon-silicon oxide composite having such a structure that silicon grains having a size of 0.5-50 nm are dispersed in silicon oxide, the silicon-silicon oxide composite being doped with lithium. Using the silicon-silicon oxide-lithium composite as a negative electrode material, a lithium ion secondary cell having a high initial efficiency and improved cycle performance can be constructed.Type: ApplicationFiled: March 22, 2007Publication date: September 27, 2007Applicant: Shin-Etsu Chemical CO., Ltd.Inventors: Mikio ARAMATA, Koichiro Watanabe, Satoru Miyawaki, Meguru Kashida, Hirofumi Fukuoka
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Publication number: 20070224509Abstract: A SiCO—Li composite is prepared by causing a reactive silane and/or siloxane having crosslinkable groups to crosslink, sintering the crosslinked product into an inorganic Si—C—O composite, and doping the Si—C—O composite with lithium. When the SiCO—Li composite is used as a negative electrode, a lithium ion secondary cell exhibits good cycle performance, unique discharge characteristics and improved initial efficiency.Type: ApplicationFiled: March 22, 2007Publication date: September 27, 2007Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Mikio Aramata, Koichiro Watanabe, Satoru Miyawaki, Meguru Kashida, Hirofumi Fukuoka
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Patent number: 7258733Abstract: A clay slurry is described using smectite clay, water, and a defined phosphonate additive that is hydrolytically stable over time. The viscosity of the clay slurry remains pourable and relatively unchanged over time compared to prior art slurries. The slurry is useful to provide rheological control to paints and coatings and is particularly useful as an anti-bleed additive for concrete.Type: GrantFiled: July 17, 2003Date of Patent: August 21, 2007Assignee: Elementis Specialties, Inc.Inventors: Wouter Ijdo, Wilbur S. Mardis, Fred Whitton
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Patent number: 7201885Abstract: Methods for the removal of lead from a metal silicate during the process of manufacturing of such a material are provided. With the reliance upon lower cost starting silicon dioxide starting materials that are known to exhibit elevated amounts of heavy metal therein for the purpose of producing metal silicates (such as sodium silicate, as one example), it has been realized that removal of significant amounts of such heavy metals is necessary to comply with certain regulatory requirements in order to provide a finished material that exhibits the same low level of heavy metal contamination as compared with finished materials that are made from more expensive, purer starting silicon dioxides. Two general methods may be followed for such decontamination purposes. One entails the introduction of a calcium phosphate material, such as dicalcium phosphate, tricalcium phosphate, and/or hydroxyapatite, to a formed metal silicate solution but prior to filtering.Type: GrantFiled: November 17, 2005Date of Patent: April 10, 2007Assignee: J.M. Huber CorporationInventors: Yung-Hui Huang, John V. Offidani
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Patent number: 7063825Abstract: A method for producing synthetic magadiite, including the step of: heating a liquid aqueous colloidal silica suspension, the liquid aqueous colloidal silica suspension having a mole ratio of sodium hydroxide to silica and a mole ratio of water to silica effective to produce a synthetic magadiite wherein more than fifty percent by weight of the synthetic magadiite is platy synthetic magadiite. The synthetic platy magadiite can be converted to the acid form and: (a) heated to produce quartz-like plates; or (b) alkylated to produce an organophilic material. A method for the production of platy sodium octasilicate and a method for preparing a liquid aqueous colloidal silica dispersion having a mole ratio of silica to sodium oxide of 3.5 to 10 are further disclosed.Type: GrantFiled: April 12, 2001Date of Patent: June 20, 2006Assignee: The Dow Chemical CompanyInventors: Juan M. Garces, Steven R. Lakso
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Patent number: 7008566Abstract: The invention provides an electrochemical cell which includes a first electrode and a second electrode which is a counter electrode to said first electrode, and an electrolyte material interposed there between. The first electrode includes an active material having an alkali metal-containing oligo phosphate-based electrode active material.Type: GrantFiled: April 8, 2003Date of Patent: March 7, 2006Assignee: Valence Technology, Inc.Inventors: Jeremy Barker, M. Yazid Saidi
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Patent number: 6893621Abstract: A lithium ion secondary cell having a high capacity, improved first charge/discharge efficiency and improved cycle performance is obtainable using as the negative electrode material a lithium-containing silicon oxide powder having the formula: SiLixOy wherein x and y are 0<x<1.0 and 0<y<1.5, with the lithium being fused and partially crystallized.Type: GrantFiled: September 5, 2002Date of Patent: May 17, 2005Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hirofumi Fukuoka, Satoru Miyawaki, Mikio Aramata, Susumu Ueno, Kazuma Momii, Takeshi Fukuda
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Patent number: 6890500Abstract: The invention is directed to open-framework and microporous solids well suited for use in catalysis and ion exchange. The microporous solids are constructed by using a salt template which can be readily removed without destroying the framework of the micropore. Various microporous solids can be formed having different geometric structures depending upon the templating salt used and the concentration. Examples of two compounds include Na2Cs[Mn3(P2O7)2]Cl and K2.02Cs2.90[Cu3(P2O7)2]Cl2.92. Both compounds have 3-D (Mn, Cu)—P—O frameworks.Type: GrantFiled: January 12, 2004Date of Patent: May 10, 2005Assignee: Clemson UniversityInventors: Shiou-Jyh Hwu, Qun Huang, Mutlu Ulutagay
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Patent number: 6890503Abstract: The present development is a silica additive for use in rubbers and similar cross-linked materials having a silicon atom intercalated within an oxygenated framework. The additive may be prepared starting with crystalline, fused or amorphous silica powder, thereby reducing the cost of the additive as compared to using precipitated silica.Type: GrantFiled: April 30, 2002Date of Patent: May 10, 2005Assignee: Minop Co.Inventors: Joseph A. Mula, Harvey Kaufman, Thomas A. Cole
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Patent number: 6883349Abstract: The subject of the invention is a process for manufacturing compounds based on one or more silicates of alkali metals, such as Na and K and/or alkaline earth metals such as Ca, Mg, and/or on rare earths, such as Ce, optionally in the form of mixed silicates which combine alkaline-earth metals, such as Ca, with the alkali metal(s) and the rare earth(s), by conversion of silica and of halides, especially of one or more chlorides, or sulfate or nitrate, of the said alkali metals and/or of the said rare earths and/or of the said alkaline-earth metals, such as NaCl, KCl or CeCl4. The heat needed for the conversion is supplied, at least partly, by one or more submerged burners. The subject of the invention is also an apparatus for carrying out the process and for its use.Type: GrantFiled: February 2, 2000Date of Patent: April 26, 2005Assignee: Saint-Gobain Glass FranceInventor: Pierre Jeanvoine
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Process for preparing sodium silicate alkali solution depleted of sodium salt and enriched in silica
Patent number: 6864202Abstract: The present invention relates to an improved process for obtaining sodium silicate alkali solution depleted of sodium salt and enriched in silica from a mother liquor recovered after isolation of molecular sieves and more particularly, the present invention relates to a process for recycling mother liquor obtained after the isolation of molecular sieves for the preparation of fresh molecular sieves or as a binder for producing Fluid Catalytic Cracking (FCC) catalyst.Type: GrantFiled: October 29, 2002Date of Patent: March 8, 2005Assignee: Indian Oil Corporation LimitedInventors: Biswanath Sarkar, Ram Mohan Thakur, Nagesh Samant, Mohan Kuvettu Prabhu, Ravichandran Gopal, Mitra Bhanu Patel, Sanjay Kumar Ray, Krishnan Venkatachalam, Satish Makhija, Sobhan Ghosh -
Patent number: 6818579Abstract: A ceramic material, includes SiO2 and Na2O and/or K2O. The material is characterized by a porosity of over 60% and by pores, more than 70% of which have a pore size ranging between 0.1 and 15 &mgr;m. The ceramic material can be used as filtering material, for water storage and as adsorbent material.Type: GrantFiled: November 25, 2002Date of Patent: November 16, 2004Assignee: Pfleiderer Infrastrukturtechnik GmbH & Co. KGInventor: Antonio Giangrasso
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Patent number: 6815099Abstract: A metallic coating containing hard carbide particles is described. The coating is applied by an HVOF process using powder particles whose size ranges from about 15 to about 44 microns. The carbide particles are held in a 80% nickel-20% chromium matrix. The coating has a reduced tensile compressive stress relative to similar plasma sprayed coatings and exhibits a high strain to cracking value.Type: GrantFiled: March 1, 2000Date of Patent: November 9, 2004Assignee: United Technologies CorporationInventors: Paul H. Zajchowski, Melvin Freling, Susan M. Meier, Roy R. Donovan
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Patent number: 6758976Abstract: A simplified process for the partial purification of contaminated phosphoric acid plant pond water having a molar calcium plus magnesium to fluorine ratio greater than or equal to about 0.60, is described, in which the pond water is treated with a basic compound, clarified, aged, clarified again and re-acidified. The thus treated pond water, still containing the majority of the phosphate originally present, can then be concentrated via the removal of essentially pure water, using any conventional means of concentration, without the formation of solid precipitates.Type: GrantFiled: February 21, 2002Date of Patent: July 6, 2004Assignee: IMC Global Operations Inc.Inventors: Dennis Michalski, Kenneth J. Jardine, Vaughn V. Astley
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Patent number: 6758977Abstract: A process for the partial purification of contaminated phosphoric acid plant pond water is described, in which the pond water is treated sequentially, with two basic compounds, clarified, aged, clarified again and re-acidified. The thus treated pond water, still containing the majority of the phosphate originally present, can then be concentrated via the removal of essentially pure water, using any conventional means of concentration, without the formation of solid precipitates.Type: GrantFiled: February 21, 2002Date of Patent: July 6, 2004Assignee: IMC Global Operations Inc.Inventors: Dennis H. Michalski, Kenneth J. Jardine, Vaughn V. Astley
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Patent number: 6743766Abstract: The invention relates to a sparingly soluble alkali metal silicate which comprises alkali metal phyllosilicate in finely divided form in a non-phyllosilicatic alkali metal silicate environment of the formula x MI2O.y SiO2, in which MI is an alkali metal and y/x (1.9 to 500): 1; a process for its preparation and its use in detergents and cleaners.Type: GrantFiled: September 11, 2000Date of Patent: June 1, 2004Assignee: Clariant GmbHInventors: Harald Bauer, Josef Holz, Guenther Schimmel, Alexander Tapper
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Patent number: 6740300Abstract: The present invention relates to an improved method for manufacturing a crystalline layered sodium disilicate and more particularly, to the improved method for manufacturing the crystalline layered sodium disilicate comprising the steps including the preparation of granules in a certain ratio of anhydrous sodium silicate cullet, a starting material, in the presence of some binders such as water and an aqueous solution of sodium silicate, followed by a crystallization step of the granules, thus ensuring that a small amount of final product is recycled to the prior crystallization step in order to prevent the attachment of granules to an inner crystallization device, which occurs due to local sintering in a high-temperature crystallization condition of continual process and also to further enhance the unit productivity during the mass production of crystalline layered sodium disilicate.Type: GrantFiled: April 10, 2001Date of Patent: May 25, 2004Assignee: Korea Research Institute of Chemical TechnologyInventors: Jung Min Lee, Jeong Kwon Suh, Soon Yong Jeong, Chun Hee Park, Jeong Hwan Park, Jong Ah Kim