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Class 423/594.13 - Tungsten containing (e.g., tungstate, etc.)


Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Subject matter for products or processes wherein at least
No. of patents: 77
Last issue date: 05/01/2012


1    
NumberTitleIssue Date
8168155Method for production of ammonium paratungstate tetrahydrate and highly pure ammonium paratungstate tetrahydrate
The invention is directed to a method for the production of ammonium paratungstate tetrahydrate by thermal treatment of ammonium paratungstate decahydrate in an aqueous suspension. The ammonium paratungstate tetrahydrate can be produced with high purity and high yie...
05/01/2012
7794686Method for making ammonium metatungstate
A method for producing ammonium metatungstate from ammonium paratungstate includes preparing an ammonium paratungstate mixture including solid ammonium paratungstate and water. The mixture is contacted with a cation exchange material to lower a pH of the mixture to ...
09/14/2010
7708974Tungsten comprising nanomaterials and related nanotechnology
Nanoparticles comprising tungsten, methods of manufacturing nanoparticles comprising tungsten, and applications of nanoparticles comprising tungsten, such as electronics, optical devices, photonics, reagents for fine chemical synthesis, pigments, and catalysts are p...
05/04/2010
7417008Supported polyoxometalates and process for their preparation
The invention relates to supported polyoxometalates represented by the formula (An)m+ [M4(H2O)10(XW9O33)2]m− or solvates thereof, wherein A represents a cation, n is...
08/26/2008
7413687Low temperature proton conducting oxide devices
A device for conducting protons at a temperature below 550° C. includes a LAMOX ceramic body characterized by an alpha crystalline structure. ...
08/19/2008
7381394Method for producing perovskite-type composite oxide
Methods of producing a safe and hygienic method for industrially and efficiently producing a perovskite-type composite oxide are provided that can maintain the catalytic activity of a noble metal at a high level. Methods include preparing a precursor of the perovski...
06/03/2008
7358380Ru-substituted polyoxometalates and process for their preparation
The invention relates to polyoxometalates represented by the formula (An)m+[R2(H2O)6X2W20O70]m− or solvates thereof, wherein A represents a cation, n is the number o...
04/15/2008
7357910Method for producing metal oxide nanoparticles
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...
04/15/2008
7354565Lead iron tungstate capacitive transducer, relaxor material therefor and method of manufacture of said relaxor material
The present invention discloses a relaxor material lead iron tungstate which has been synthesized in doped and undoped conditions by single and two step heat treatment. The relaxor material is seen to exhibit almost negligible hysteresis and a transducer made thereb...
04/08/2008
7335625Organoammonium tungstate and molybate compounds, and process for preparing such compounds
Novel organoammonium compounds are provided, which are useful as additives for improving the antiwear and friction-reducing properties of lubricating compositions. The compound is formed by reacting a metal acid hydrate with one or more alkyl amines. Particular exam...
02/26/2008
7271114Perovskite ceramic powder and electronic component using same and manufacturing methods thereof
A ceramic powder having a perovskite structure is manufactured by synthesizing a ceramic powder by a dry synthesis process and then heat-treating the synthesized ceramic powder in a solution. The dry synthesis method includes a solid phase synthesis method, an oxala...
09/18/2007
7255962Eulytite solid acid electrolytes for electrochemical devices
Improved solid acid electrolyte materials, methods of synthesizing such materials, and electrochemical devices incorporating such materials are provided. The stable electrolyte material comprises a solid acid in a eulytine structure capable of undergoing rotational ...
08/14/2007
7232556Titanium comprising nanoparticles and related nanotechnology
Nanoparticles comprising titanium, such as nanoscale doped titanium metal compounds, inorganic titanium compounds, and organic titanium compounds, their methods of manufacture, and methods of preparation of products from nanoparticles comprising titanium are provide...
06/19/2007
7223377Process for producing micro-mesoporous metal oxide having regulated pores formed by novel template removal method
The present invention is the method for preparation of transition metal oxide having micro-mesoporous structure whose average fine pores size is not less than 1 nm and not more than 2 nm comprising, adding and dissolving transition metal salt which is a precursor of...
05/29/2007
7211238Mesoporous aluminum oxide, preparation and use thereof
Mesoporous aluminum oxides with high surface areas have been synthesized using inexpensive, small organic templating agents instead of surfactants. Optionally, some of the aluminum can be framework-substituted by one or more other elements. The material has high the...
05/01/2007
7208244Di-ruthenium-substituted polyoxometalate electrocatalyst and method of oxygen generation
A catalyst comprising a di-ruthenium-substituted polyoxometalate, especially Na14[Ru2Zn2(H2O)2(ZnW9O34)2] with a Ru—Ru distance of 0.318 nm and a method of using the electrocat...
04/24/2007
7138102Method for manufacturing highly-crystallized double oxide powder
A method for manufacturing a highly-crystallized double oxide powder composed of a single crystal phase which can be used as a phosphor material, a dielectric material, a magnetic material, etc. The method involves forming fine droplets of a raw material solution co...
11/21/2006
7132092Metallized mesoporous silicate and method of oxidation with the same
A metallized mesoporous silicate which is obtained by (i) reacting (a) either a metal peroxide obtained by the reaction of an aqueous hydrogen peroxide solution with at least one metal or metal compound selected from the group consisting of the following 1) to 4) 1)...
11/07/2006
7105235Isotropic zero CTE reinforced composite materials
A reinforced composite material, having isotropic thermal expansion properties and a low coefficient of thermal expansion over at least the temperature range of from about 0° C. to at least about 150° C., which composite material comprises in combination a first c...
09/12/2006
7067446Material demonstrating negative or low thermal expansion coefficient and method for manufacture thereof
A material having a negative or low thermal expansion coefficient and composed substantially of a single crystal system is provided. The material is an oxide represented by the chemical formula ((R4+M2+)1-xA3+2...
06/27/2006
7049257Low thermal expansion materials
It is a principal object of the present invention to provide low thermal expansion materials able to answer to the needs of various uses. The present invention relates to low thermal expansion materials constituted substantially from a crystalline body represented b...
05/23/2006
6974566Method for producing mixed metal oxides and metal oxide compounds
A process to produce mixed metal oxides and metal oxide compounds. The process includes evaporating a feed solution that contains at least two metal salts to form an intermediate. The evaporation is conducted at a temperature above the boiling point of the feed solu...
12/13/2005
6936235Process for preparation of zirconium tungstate ceramic body, zirconium tungstate ceramic body prepared thereby, and temperature compensated fiber bragg grating device
The present invention discloses a process for the preparation of zirconium tungstate (ZrW2O8) ceramic body, comprising a reactive sintering step to react and sinter powders of the raw materials comprising a Zr-containing compound and a W-contai...
08/30/2005
6911470Polyoxometalate compounds as antiviral agents
Polyoxometalate compounds which exhibit anti-retroviral activity are disclosed. Compounds with anti-retroviral activity include those having the following general molecular formulas: M7PW11O39 M8SiW
06/28/2005
6844283Zero thermal expansion material and practical component parts making use of the same
Using as a negative thermal expansion material a double oxide containing at least partly a compound represented by the chemical formula: RQ,O, (wherein R is Zr, Hf or a tetravalent metallic element represented by a mixture system of these, and Q is a hexavalent meta...
01/18/2005
6780394High pressure production of perovskites and resulting products
A perovskite feedstock (powder or preform) is placed in a high-pressure cell of a high pressure/high temperature (HP/HT) apparatus and subjected to pressures in excess of about 2 kbar and temperatures above about 800° C. for a time adequate to increase the density ...
08/24/2004
6773851Synthesis of Li2Mn4O9 using lithium permanganate precursor
Li2Mn4O8+z, with z greater than zero and less than one, is prepared from LiMnO4 and an appropriate complimentary compound, such as MnOOH, MnO2 or MnCO3 precursors. The Li2Mn4O
08/10/2004
6770256Process for synthesizing metal oxides and metal oxides having a perovskite or perovskite-like crystal structure
Metal oxides having a perovskite or perovskite-like crystal structure are prepared by a process comprising subjecting a mixture of starring powders to a high energy milling sufficient to induce chemical reaction of the components and thereby directly mechanosynthesi...
08/03/2004
6183716Solution method for making molybdate and tungstate negative thermal expansion materials and compounds made by the method
A method for making negative thermal expansion materials having the formula ##EQU1## where A4+ is Zr4+, Hf4+, or mixtures thereof, and M6+ is Mo6+, W6+, or mixtures thereof, is described. The me...
02/06/2001
6103392Tungsten-copper composite powder
A high performance W--Cu composite powder is provided which is composed of individual particles having a tungsten phase and a copper phase wherein the tungsten phase substantially encapsulates the copper phase. The tungsten-coated copper composite powder ...
08/15/2000
5993756Sodium tungstate preparation process
A method for the preparation of sodium tungstate by the oxidation of hard metal scrap and/or heavy metal scrap in a molten salt mixture of hydroxide and sodium sulfate....
11/30/1999
5932184Method for recovery of tungsten from spent catalysts
A method for recovering tungsten from a tungsten containing spent catalyst comprises digesting the catalyst in aqueous sodium hydroxide solution wherein the mole ratio of the sodium hydroxide to the tungsten contained in the spent catalyst is from about 2...
08/03/1999
5874056Metal tungstates and method of preparing them and their use
Phase-pure, crystalline tungstates of general composition Me(II)WO4, where Me(II)=Co, Ni, Zn, Pb, Mg, Ca, Sr and/or Ba. These are prepared by wet mixing tungsten components (preferably ammonium paratungstate or metatungstate) with corresponding...
02/23/1999
5855862Process for the preparation of an oxide, especially a transition metal oxide
A method for preparing an oxide (P), which includes the steps of (i) forming a solid phase compound (O) based on an oxide containing molecular entities (1) chosen from optionally substituted ammonium, diammonium, diazan-ium or diazandium, the entities bei...
01/05/1999
5578285Process for reducing the average particle size of ammonium paratungstate powders
A process for reducing the average particle size of an ammonium paratungstate powder having the steps of heating the ammonium paratungstate powder at a temperature of between about 110° C. to about 205° C. for a time sufficient to reduce the average par...
11/26/1996
5470549Method of making tungsten-copper composite oxides
A method for making a tungsten-copper composite oxide wherein an amount of an ammonium tungstate and an amount of an oxide or hydroxide of copper are combined without milling to form a mixture. The unmilled mixture is then dehydrated and fired at a temper...
11/28/1995
5468457Method of making tungsten-copper composite oxides
A method of making a tungsten-copper composite oxide wherein an amount of an oxide of tungsten and an amount of an oxide of copper are combined to form a mixture, the oxide of tungsten or the oxide of copper, or both, being in a hydrated form. The mixture...
11/21/1995
5178848Lithium metatungstate
Lithium metatungstate as a new composition of matter and the production thereof are disclosed. A solution of lithium monotungstate is treated with an extractant to remove sufficient lithium ions to produce a dilute solution of lithium metatungstate and th...
01/12/1993
5079199Method of manufacturing dielectric ceramic compositions of lead-based perovskite
A manufacturing method for dielectric ceramic compositions of lead-based perovskite containing lead magnesium tungstate [Pb(Mg1/2 W1/2)O3 ] as a component which is characterized in that magnesium tungstate powder [MgWO
01/07/1992
5062936Method and apparatus for manufacturing ultrafine particles
A method for the manufacture of ultrafine particles or atom clusters is disclosed. The ultrafine particles of size between about 10 to 1000 Angstroms are formed by the disruption of the crystal lattice or micrograin structure of the metal, alloy or interm...
11/05/1991
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