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7615201 |
Spherical particles of silica-containing compound oxide and method of production
By using a halogen-free siloxane and an organometallic compound containing at least one metal other than silicon as feed stocks, and simultaneously atomizing and burning them in a flame, spherical...
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7585480 |
Highly pure ultra-fine SiOx powder and method for production thereof
A highly pure ultra-fine SiOx (wherein x is from 0.6 to 1.8) powder having a specific surface area of at least 10 m 2 /g and a total content of Na, Fe, Al and Cl of at most 10 ppm is provided. The...
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7534411 |
Process for the preparation of pure silica
A production process for producing high-purity silica from a crude silica source by means of fluosilic acid, including the steps of: (a) subjecting the crude silica souce and the fluosilicic acid...
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7534409 |
Pyrogenic silicon dioxide powder and dispersion thereof
Pyrogenically produced silicon dioxide powder with a specific surface area of between 5 and 600 m 2 /g and a carbon content of less than 500 ppm, which displays a specific dibutyl phthalate...
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7534410 |
Method for making silica nanoparticles by flame spray pyrolysis adopting two-fluid nozzle
The invention relates to a method for making silica nanoparticles using a flame reactor, which includes a droplet spray having a two-fluid nozzle and a burner of a quintuple tube structure. In this...
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7507389 |
Hydrophobic fumed silica
A hydrophobic fumed silica treated with a cyclic dimethylsiloxane, the hydrophobic fumed silica having an M-value representing an oleophilic degree in a range of 48 to 65, a tapping bulk density of...
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7442357 |
Manufacture of silica aerogel via vapor phase reaction
A kinetically controlled vapor reaction process for synthesizing silica areogel in a reaction container by injection of a precursor reagent vapor, a catalyst reagent vapor, super saturated steam as...
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7431899 |
Apparatus for the continuous production of silicon oxide powder
A silicon oxide powder can be continuously prepared by feeding a raw material powder mixture containing silicon dioxide powder into a reaction chamber ( 2 ) at a temperature of 1,100-1,600° C., to...
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RE40299 |
Mesoporous-silica films, fibers, and powders by evaporation
This invention pertains to surfactant-templated nanometer-scale porosity of a silica precursor solution and forming a mesoporous material by first forming the silica precursor solution into a...
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7338982 |
Functionalized mesoporous silicate structures, and related processes
A mesoporous material is described. It includes a network of interconnected pores within an L3 phase structure. The pores include pore walls of a silicate material functionalized with at least one...
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7332144 |
Hydrophobic silica fine powder and making method
A hydrophobic silica fine powder is prepared by premixing a hydrophilic silica fine powder with a dimer diol siloxane or cyclic siloxane as a hydrophobizing agent, mixing them in a ball mill for...
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7255843 |
Low viscosity-increment fumed-silica and its slurry
A fumed-silica, which can make a slurry having sufficient wettability to a polar liquid, excellent dispersibility, and low viscosity even in the high concentration, and a slurry thereof. A...
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RE39535 |
Method of making fused silica by decomposing siloxanes
This invention relates to the production of high purity fused silica glass through oxidation or flame hydrolysis of a vaporizable silicon-containing compound. More particularly, this invention is...
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7192461 |
High concentration silica slurry
A high concentration silica slurry can be used for polishing of substrates, such as semiconductor materials. The slurry contains a silica powder dispersed in an solvent. The silica slurry has a...
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7090809 |
Production of aluminum compounds and silica from ores
A method for the production of inorganic aluminum substances and amorphous silica from aluminum oxide containing ores, comprising: (a) leaching of said ores with fluorosilicic acid to obtain...
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7083770 |
Amorphous, fine silica particles, and method for their production and their use
The amorphous-silica particle having 0.1–0.7 μm of the average particle diameter, 5–30 m 2 /g of the specific surface area, less than 40% of the dispersion coefficient, and 20 μC/m 2 of the...
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6994834 |
Surface-modified fine silica powder and use thereof
A surface modified fine silica powder which has been treated, preferably, with a treating agent containing an amino group, characterized in that the powder exhibits an adsorption amount for an...
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6932953 |
Particulate silica and its preparation
Particulate silica is prepared by feeding a gas mixture of an organohalosilane gas, a flammable gas capable of generating water vapor when burned, and a free oxygen-containing gas to a reaction...
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6872402 |
Bactericidal silicon dioxide doped with silver
Pyrogenically prepared silica doped with silver or silver oxide is prepared by feeding an aerosol into a flame such as is used for the preparation of pyrogenic silica, mixing the aerosol...
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6835683 |
Quartz glass member and projection aligner
A silica glass member of the present invention is one wherein when a composition thereof is expressed by SiO x , x is not less than 1.85 nor more than 1.95, wherein a concentration of hydrogen...
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6800413 |
Low-silanol silica
A silylated silica having an SiOH density per nm 2 of less than 0.6, based on the BET-method surface area (DIN 66131 and 66132), is prepared by silylating silica in a process where loading,...
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6780393 |
Method of producing fine particles of metal oxide
A method of producing fine particles of an oxide of a metal, comprising the steps of: preparing an acidic solution which contains ions of the metal; precipitating fine particles of a hydroxide of...
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6763683 |
Method for pure, fused oxide
A method and furnace are described for producing a fused oxide body by decomposing a precursor compound of the oxide in a flame to form molten oxide particles and collecting those particles in a...
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6759160 |
Silicon oxide powder and making method
A silicon oxide powder represented by the formula: SiOx wherein 1.05≦x≦1.5 and having a BET specific surface area of 5-300 m 2 /g is useful as a negative electrode material to construct a...
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6705127 |
Methods of manufacturing soot for optical fiber preforms and preforms made by the methods
The present invention is directed to methods of producing soot used in the manufacture of optical waveguides. Both non-aqueous liquid reactants and aqueous solutions containing one or more salts...
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6696602 |
Method for the production of phosphonomethylglycine
The present invention relates to a process for the preparation of phosphonomethylglycine, wherein N-phosphonomethyliminodiacetic acid N-oxide is brought into contact with a catalytically effective...
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6685906 |
Silicon oxide containing active silicon and its evaluation
Silicon oxide containing active silicon represented by the general formula: SiOx wherein x is from 0.8 to 1.9, when analyzed by solid state NMR (29Si DD/MAS) with a sufficient relaxation time set,...
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6672110 |
Method of forming an optical fiber preform by combustionless hydrolysis
A method for manufacturing a glass preform includes supplying a first gaseous or vapor phase composition to a reaction chamber; supplying water as a second gaseous or vapor phase composition to the...
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6649268 |
Optical member made of silica glass, method for manufacturing silica glass, and reduction projection exposure apparatus using the optical member
An optical member made of silica glass manufactured by the direct method where a material gas comprising an organosilicon compound is allowed to react in an oxidizing flame, said optical member...
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6638982 |
Method of preparing a fumed metal oxide dispersion
The invention provides a method of preparing a dispersion of a fumed metal oxide in a liquid carrier comprising the following sequential steps: (a) providing a liquid carrier at a pH that effects...
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6622523 |
Method of converting halogenated compounds to glass
The present invention provides a two stage process of thermal separation of CFCs and HCFCs followed by vitrification of the waste into a commercially viable glass. In the first stage, the...
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6590116 |
Process for purifying siloxane
The present invention is directed to a process for purifying siloxane. The invention relates to a method of making a purified siloxane feedstock for use in the manufacturing of silica glass. The...
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6518210 |
Exposure apparatus including silica glass and method for producing silica glass
A silica glass has a structure determination temperature of 1200 K or lower and an OH group concentration of at least 1,000 ppm. The silica glass is used for photolithography together with light in...
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6455455 |
Silicon-aluminum mixed oxide
A silicon-aluminum mixed oxide produced by flame hydrolysis and having a composition of from 1 to 99.999 wt. % Al 2 O 3 , the remainder being SiO 2 , which mixed oxide exhibits an amorphous...
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6432151 |
Preparing method of silica slurry for wafer polishing
Disclosed herein is a method of preparing silica slurry for wafer polishing. This method includes pre-treating relatively inexpensive and commercially available fumed or colloidal silica particles...
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6395807 |
Fine spherical silica and liquid sealing resin composition containing same
The fine spherical silica having a particle size distribution in which maximum particle diameter is 24 μm, average particle diameter is 1.7 to 7 μm, and the proportion X 1 of particles having a...
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6322765 |
Process for preparing silicon dioxide
The invention relates to a process for preparing highly disperse silicon dioxide by combustion of organochlorosilicon compounds, which comprises transporting a liquid which contains at least one...
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6217840 |
Production of fumed silica
A method for producing fumed silica and a fluorine-containing product from a source of silica in solid form and a solid material containing fluorine, the solid material selected from the group...
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6123908 |
Method of treating spent potliner material from aluminum reduction cells
A process of treating spent potliner material from aluminum reduction cells and recovering useful products. In the process of the present invention, spent potliner material is introduced into an...
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6071486 |
Process for producing metal oxide and organo-metal oxide compositions
A for producing metal oxide and/or organo-metal oxide compositions from metal oxide and organo-metal oxide precursors utilizing a rate modifying drying agent. The process allows metal oxide and/or...
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6063354 |
Pyrogenic oxides and a process for their preparation
Pyrogenic oxides having a BET surface area of between 30 and 150 m 2 /g have a viscosity of less than 2,500 mPas in an aqueous suspension. They are prepared by setting the hydrogen ratio gamma and...
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6017505 |
Method of producing inorganic aerogels under subcritical conditions
Preparation of inorganic aerogels based on oxides of the metals magnesium, aluminum, silicon, tin, lanthanum, titanium, zirconium, chromium and/or thorium by producing a hydrogel in a sol/gel...
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5976480 |
Pyrogenic silica, process for the production thereof and use
Pyrogenically produced silica having a specific surface of less than 90 m 2 /g, preferably of less than 60 m 2 /g, and a DBP absorption of less than 60 wt. % (less or equal to 57.30 ml dibutyl...
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5919298 |
Method for preparing hydrophobic fumed silica
A method for the preparation of hydrophobic fumed silicas which are useful, for example, as reinforcing fillers in rubber compositions. The method comprises two steps, where in the first step an...
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5905183 |
Process for reducing the residual chloride concentration in copper containing solids
The instant invention provides a process for reducing chloride content from by-products generated during production of methylchlorosilanes, comprising, (a) hydrolyzing the by-products by combining...
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5902636 |
Method for chemical surface modification of fumed silica particles
Dehydroxylated, silica-containing, glass surfaces are known to be at least partially terminated by strained siloxane rings. According to the invention, a surface of this kind is exposed to a...
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5900450 |
Three-dimensionally connected silica sphere-resin composite and method for production thereof
A method for preparing a three dimensionally connected silica spheres-resin composite, which comprises hydrolyzing and polymerizing a low molecular weight polyalkoxysilane in the presence of an...
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5879649 |
Method for purifying polyalkylsiloxanes and the resulting products
The present invention is directed to a purified polyalkylsiloxane composition having a boiling point, under atmospheric conditions, of less than about 250° C. and containing high boiling...
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5855860 |
Method for porifying fine particulate silica
Crude fumed silica resulting from pyrogenic hydrolysis is purified by continuously feeding particulate silica and steam or a mixture of steam and air in a steam/air volume ratio of at least 1/2...
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5776240 |
Granules based on pyrogenically prepared silicon dioxide, methods for their preparation and use thereof
Granules based on silicon dioxide and having the properties: Average particle size: 10 to 120 μm BET surface area: 40 to 400 m 2 /g Pore volume: 0.5 to 2.5 ml/g Pore size...
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