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| Number | Title | Issue Date |
| 8110166 | Process for producing silica from olivine A process for producing from olivine precipitated silica with controlled specific surface area and high degree of purity. The process comprises adding olivine in a controlled manner to a heated mineral acid solution; after separating undissolved olivine and filterin... | 02/07/2012 |
| 8097229 | Methods for manufacturing functionalized inorganic oxides and polymers incorporating same Inorganic oxide substrates are functionalized with silicon-free organic functionalizing agents. The organic functionalizing agent has a bonding functional group for bonding to the substrate and a functionalizing moiety that is not bonded to the substrate for imparti... | 01/17/2012 |
| 8075862 | Hydrophobic fumed silica and silicone rubber materials containing the fumed silica The present invention relates to a hydrophobic, fumed silica which is obtained by milling a fumed silica which has fixed dimethylsilyl and/or monomethylsilyl groups on the surface due to silanization; and to a process for the preparation of the silica according to t... | 12/13/2011 |
| 8057771 | Process for recovering useful products and energy from siliceous plant matter In the process disclosed herein, siliceous plant matter is steeped in water, soaked in an aqueous solution containing a solute which solubilizes inorganic oxides, soaked in an aqueous solution containing an oxidizing solute, rinsed, dried and thermally pyrolyzed to ... | 11/15/2011 |
| 8057772 | Mesoporous silica particles and preparation method thereof Disclosed are mesoporous silica particles and a preparation method thereof, particularly, a method of preparing mesoporous silica particles, including mixing a silica precursor, an alkylamine-based surfactant, and a phosphoric acid-based cosurfactant, thus preparing... | 11/15/2011 |
| 8017098 | Aluminum-containing precipitated silicic acid having an adjustable BET/CTAB ratio The present invention relates to precipitated silica containing aluminum, which has an adjustable BET/CTAB ratio, a process for its manufacture and its use. ... | 09/13/2011 |
| 8007751 | Hydrophilic precipitated silica for defoamer formulations Precipitated silicas with a high pH and their use in applications as defoamers having optimum silanol group density and a process for preparing precipitated silicas and to their use, particularly in defoamer formulations. ... | 08/30/2011 |
| 7998448 | Amorphous silica and its manufacturing method A production method of amorphous silica comprises a step of preparing organic waste containing silicon oxide as a starting material, a step of immersing the organic waste in a carboxylic acid aqueous solution having a hydroxyl group, a step of washing the organic wa... | 08/16/2011 |
| 7976812 | Method for producing non-porous core-porous shell silica A core-shell silica having a high sphericity and a narrow particle distribution and a method for easily producing the core-shell silica which includes dispersing substantially non-porous silica core particles having a sphericity of at least 0.8 and a coefficient of ... | 07/12/2011 |
| 7935326 | Method for purification of silica particles, purifier, and purified silica particles To provide a treatment method having excellent purification effect, in which impurities having high ionicity in a silica powder can be removed in a short time, a apparatus thereof, and a purified silica powder. A purification method of a silica powder compris... | 05/03/2011 |
| 7892510 | Silicon dioxide dispersion Stable, aqueous dispersion containing silicon dioxide powder having a hydroxyl group density of 2.5 to 4.7 OH/nm2, which is obtained from a silicon dioxide powder produced by a flame hydrolysis process under acid conditions. The dispersion is produced by ... | 02/22/2011 |
| 7871588 | Silica by precipitation at constant alkali number, and its use Precipitated silica or silicates, obtainable by acid precipitation of aqueous silicate solutions while maintaining a constant alkali number of at least 1. ... | 01/18/2011 |
| 7871589 | Pyrogenically prepared silicon dioxide with a low thickening effect Provided is a pyrogenically prepared SiO2 powder in the form of aggregated primary particles having a statistical thickness surface area (STSA) of 10-500 m2/g, a thickening action based on the STSA of 4-8 mPas·g/m2, and a micropore ... | 01/18/2011 |
| 7842269 | Pyrogenically prepared silicon dioxide compacted to give crusts Pyrogenically prepared silicon dioxide is compacted to give crusts, in that it is subject to preliminary de-aeration, and is compacted to give crusts, and the crusts are broken and, if appropriate, classified. The tamped bulk density (to DIN EN ISO 787-11) of the si... | 11/30/2010 |
| 7824643 | Silicon dioxide dispersion Stable, aqueous dispersion containing silicon dioxide powder having a hydroxyl group density of 2.5 to 4.7 OH/nm2, which is obtained from a silicon dioxide powder produced by a flame hydrolysis process under acid conditions. The dispersion is produced by ... | 11/02/2010 |
| 7824644 | Particulate silica There is provided particulate silica which can be suitably used as a viscoelasticity modifier such as a thickener which is added to liquid such as water, a liquid resin or paint to adjust its viscoelastic properties such as viscosity and thixotropic nature, a reinfo... | 11/02/2010 |
| 7815883 | Preparation of organic-functionalized mesoporous silica with platelet morphology and short mesochannels A facile synthesis route for preparing SBA-15 silica of platelet shape and very short mesochannels was developed by introducing a small amount of Zr(IV) ions in the first synthesis solution. The synthesis route can be easily extended to prepare SBA-15 materials with... | 10/19/2010 |
| 7811540 | Method of preparing hydrophobic silica directly from an aqueous colloidal silica dispersion The invention provides a method of preparing hydrophobic silica particles comprising (a) providing an aqueous colloidal silica dispersion comprising about 5-70 wt. % of silica particles having an average overall particle size of about 10-1000 nm, wherein the silica ... | 10/12/2010 |
| 7803341 | Fine dry silica particles Fine dry silica particles are produced by combustion by using a burner of a multiple-pipe structure, feeding a mixed gas of a gas of a siloxane compound without containing halogen in the molecules thereof and an oxygen gas at a ratio of 0.3 to 1.5 into the center pi... | 09/28/2010 |
| 7799303 | Method of preparing silica nanoparticles from siliceous mudstone There is provided a method of preparing silica (SiO2) nanoparticles from siliceous mudstone which is silica mineral sources, using a chemical reaction. The method of preparing silica nanoparticles from siliceous mudstone comprises: solving a silica consti... | 09/21/2010 |
| 7790131 | High-surface precipitation silica acids The present invention relates to a highly dispersible silica which has a high surface area, a process to manufacture the aforesaid silica and its use as a tire filler for utility vehicles, motor cycles and high speed vehicles. ... | 09/07/2010 |
| 7780937 | Granules based on pyrogenically prepared silicon dioxide, method for their preparation and use thereof Granules based on silicon dioxide and having the properties: Average grai... | 08/24/2010 |
| 7763223 | Method for manufacturing porous silica crystal In a synthetic method for porous silica crystals through a hydrothermal reaction, a method for synthesizing porous silica crystals with a size of 0.5 mm or larger in high reproducibility and efficiency is provided using a method for manufacturing the porous silica c... | 07/27/2010 |
| 7736612 | Processes for production of silica gels carrying derivatization agents for carbonyl compounds The subject of the present invention is to provide a method for producing a silica gel supporting a derivatizing agent for a carbonyl compound that hardly collects carbonyl compounds during production thereof, and a silica gel supporting a derivatizing agent for a c... | 06/15/2010 |
| 7722849 | Pyrogenic silicon dioxide and a dispersion thereof Pyrogenic silicon dioxide powder with a BET surface area of 30 to 90 m2/g, a DBP index of 80 or less, a mean aggregate area of less than 25000 nm2 and a mean aggregate circumference of less than 1000 nm, wherein at least 70% of the aggregates h... | 05/25/2010 |
| 7695705 | Method and apparatus for the production of ultrafine silica particles from solid silica powder and related coating compositions Disclosed are methods for making ultrafine silica particles in a plasma system, apparatus for making ultrafine silica particles, and coating compositions comprising ultrafine silica particles made by such methods and/or apparatus. ... | 04/13/2010 |
| 7670580 | Dental resin materials, method of manufacture, and uses thereof A filler for a dental resin composition is disclosed, comprising silica particles derived from a nanoparticulate silica sol, the filler material having at least one crystalline phase. The filler material provides improved wear resistance and other properties. ... | 03/02/2010 |
| 7628971 | Highly dispersible precipitated silica having a high surface area The present invention relates to a highly dispersible silica which has a high surface area, a process to manufacture the aforesaid silica and its use as a tire filler for utility vehicles, motor cycles and high speed vehicles. ... | 12/08/2009 |
| 7608234 | Precipitated silicas with particular pore size distribution Precipitated silicas useful, for example, as fillers in elastomer mixtures or vulcanizates have a particularly broad pore size distribution of the pores with a pore diameter smaller than that of the maximum of the derivative of the pore volume distribution function,... | 10/27/2009 |
| 7566433 | Precipitated silicas with a particular pore size distribution Precipitated silicas which have a broad pore size distribution of the pores with a pore diameter smaller than that of the maximum of the derivative of the pore volume distribution function are useful, for example, for tires. ... | 07/28/2009 |
| 7541014 | Pyrogenically produced silica Pyrogenically produced silica powder with a BET surface of 30 to 90 m2/g, a dibutyl phthalate number of at least 80 and a tamped density of no more than 110 g/l. It is produced in that at least one vaporous silicon compound, a gas containing free oxygen a... | 06/02/2009 |
| 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 method, droplets of silicon alkoxide as liquid Si compound are spray... | 05/19/2009 |
| 7534409 | Pyrogenic silicon dioxide powder and dispersion thereof Pyrogenically produced silicon dioxide powder with a specific surface area of between 5 and 600 m2/g and a carbon content of less than 500 ppm, which displays a specific dibutyl phthalate absorption of less than or equal to 1.2 g dibutyl phthalate/100 g S... | 05/19/2009 |
| 7524478 | Low water uptake silicas The invention concerns a method for preparing low water uptake precipitated silicas, comprising successive steps which consist in: (a) producing an initial starter including a silicate, the silicate concentration in said starter, expressed in SiO2 equival... | 04/28/2009 |
| 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 not smaller than 80 g/L but not larger than 130 g/L, and an n-value ... | 03/24/2009 |
| 7494636 | Highly dispersible fine hydrophobic silica powder and process for producing the same A high dispersible hydrophobic fine silica powder can be made, wherein the silica powder has hydrophobicity of more than 50%, triboelectrostatic charge of more than −500 μC/g, decomposition rate of an organic group on the powder surface of less than 15%, transmit... | 02/24/2009 |
| 7491375 | Pyrogenically produced silicon dioxide powder Pyrogenically produced silicon dioxide powder in the form of aggregates of primary particles having a BET surface area of 200±25 m2/g, wherein the aggregates display an average surface area of 7000 to 12000 nm2, an average equivalent circle di... | 02/17/2009 |
| 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 a component of the catalyst solution, and a hydrophobic reagent vapo... | 10/28/2008 |
| 7439298 | Pyrogenically produced silicon dioxide powder and silicone sealing compound containing this powder Pyrogenically produced silicon dioxide powder in the form of aggregates of primary particles having a BET surface area of 150±15 m2/g, wherein the aggregates display an average surface area of 12000 to 20000 nm2, an average equivalent circle d... | 10/21/2008 |
| 7431912 | Producing method for zirconia hollow particles A producing method for producing zirconia hollow particles in which a zirconia powder mutually combines to form a porous shell layer thereby constructing a hollow structure, the method being characterized in mixing under a pressurized contact a resin powder and a zi... | 10/07/2008 |
