By Precipitating Patents (Class 423/339)
  • Patent number: 10328002
    Abstract: A dentifrice composition containing an abrasive and a stannous ion source. The abrasive can contain precipitated silica particles where the extractable stannous ions after 30 days at 40° C. is greater than about 75% of the initial extractable stannous ion concentration.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: June 25, 2019
    Assignee: THE PROCTER & GAMBLE COMPANY
    Inventors: Lawrence Edward Dolan, Sanjeev Midha, Eva Schneiderman, Karl William Gallis, William Jackson Hagar, Terry William Nassivera
  • Patent number: 10246338
    Abstract: A process for preparing precipitated silica comprising a reaction of a silicate with an acidifying agent to obtain a suspension of precipitated silica (S1), followed by a separation step to obtain a cake, a disintegration step of said cake to obtain a suspension of precipitated silica (S2), and a drying step of this suspension, wherein the disintegration step is performed by mixing using a twin-screw mixer or by extrusion.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: April 2, 2019
    Assignee: Rhodia Operations
    Inventors: Sylvaine Neveu, Anne-Laure Pinault, Philippe Jost
  • Patent number: 10106426
    Abstract: The present invention relates to a method of purifying strong acids or strongly acidic media to remove di- and higher valent metal ions, which can be used within the context of the production of high-purity silica. The invention further relates to the use of special ion exchangers for carrying out the method according to the invention and the resultant high-purity silicas.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: October 23, 2018
    Assignee: Evonik Degussa GmbH
    Inventors: Christian Panz, Florian Paulat, Guido Titz, Sven Müller, Peter Erlhöfer, Markus Ruf, Bodo Frings, Hartwig Rauleder, Thomas Barthel, Mustafa Siray, Jürgen Behnisch
  • Patent number: 9994714
    Abstract: A pigment particle for use in artist color media comprises a silica containing core particle having pore channels formed therein, at least one colorant present in the pore channels in at least part of the silica particle, and a nonporous silica layer coated over the pore channels. A method of manufacturing colored particles for use in artist color media comprises providing a core silica particle having pore channels formed therein, loading at least one colorant into the pore channels of the particle, and depositing a silica layer over the pore channels using fluorosilicic acid. Another method of manufacturing colored particles for use in artist color media comprises providing a porous silica particle having pore channels formed therein, and depositing a silica layer over the pore channels using a fluorosilicic acid where a colorant is present in the fluorosilicic acid.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: June 12, 2018
    Inventor: Thomas E. Kane
  • Patent number: 9938154
    Abstract: A precipitated silica production process that includes a precipitation reaction between a silicate and an acid is described, in which the acid used in at least one of the steps of the process is a concentrated acid.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: April 10, 2018
    Assignee: Rhodia Operations
    Inventors: Malika Clouin, Sylvaine Neveu, Joël Racinoux
  • Patent number: 9725326
    Abstract: Provided is a hydrophilic precipitated silica which is well suited to use in silicone rubber formulations (RTV-1, RTV-2, HTV and LSR), particularly well suited to use in HTV silicone rubber formulations. It has a BET surface area of 185˜260 m2/g, a CTAB surface area of 100˜160 m2/g, a BET/CTAB ratio of 1.2˜2.6, and a conductivity of <250 ?S/cm. Also provided are a process for producing the precipitated silica and the use of the precipitated silica for thickening and reinforcing silicone rubber formulations.
    Type: Grant
    Filed: July 3, 2009
    Date of Patent: August 8, 2017
    Assignee: Evonik Degussa GmbH
    Inventors: Gottlieb-Georg Lindner, Michael Kempf
  • Patent number: 9623417
    Abstract: A water saving and energy saving process the continuous production of whole grain flour and whole gluten-free flour is provided. The process includes preconditioning whole-grain or seed with water and uses an energy efficient blanching treatment with saturated steam. The process also provides flour having a bimodal size mixture of material having improved viscosity. The whole grain and whole gluten-free flour can be used to prepare grain products and baked foods.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: April 18, 2017
    Assignee: INVESTIGACION TECNICA AVANZADA S.A. DE C.V.
    Inventors: Felipe A. Rubio, Manuel J. Rubio, Roberto Contreras M.
  • Patent number: 9604220
    Abstract: A water saving and energy saving process the continuous production of whole grain flour and whole gluten-free flour is provided. The process includes preconditioning whole-grain or seed with water and uses an energy efficient blanching treatment with saturated steam. The process also provides flour having a bimodal size mixture of material having improved viscosity. The whole grain and whole gluten-free flour can be used to prepare grain products and baked foods.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: March 28, 2017
    Assignee: INVESTIGACION TECNICA AVANZADA S.A. DE C.V.
    Inventors: Felipe A. Rubio, Manuel J. Rubio, Roberto Contreras
  • Patent number: 9561966
    Abstract: The present invention discloses glycoxy silanes as a source of silica and silica precipitated by advantageous chemical reactions preferably beginning with biogenic silica. Alkoxy C—O—S1 are hydrolyzed in a controlled fashion to nucleate formation of nanoparticles of silica. The growth rate of the particles is controlled by various parameters such that particles of known sizes, size distributions, specific surface areas and pore sizes and size distributions are recovered.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: February 7, 2017
    Assignee: WADHAM ENERGY LP
    Inventors: Richard M. Laine, Julien C. Marchal, Vera Popova, David J. Krug
  • Patent number: 9550682
    Abstract: A silica production method comprising reacting a silicate with at least one acid, in which the acid used in at least one of the steps of the production method is a concentrated acid, preferably selected from the group consisting of sulfuric acid having a concentration of at least 80% by weight, in particular at least 90% by weight, acetic acid having a concentration of at least 90% by weight, formic acid having a concentration of at least 90% by weight, nitric acid having a concentration of at least 60% by weight, phosphoric acid having a concentration of at least 75% by weight, and hydrochloric acid having a concentration of at least 30% by weight.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: January 24, 2017
    Assignee: Rhodia Operations
    Inventors: Malika Clouin, Sylvaine Neveu
  • Patent number: 9487407
    Abstract: A process for preparing precipitated silica comprising a reaction of a silicate with an acidifying agent to obtain a suspension of precipitated silica (S1), followed by a step of separation to obtain a cake, a step of spalling said cake to obtain a suspension of precipitated silica (S2) and a step of drying said suspension, wherein the spalling step is carried out at a temperature of between 50 and 120° C.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: November 8, 2016
    Assignee: RHODIA OPERATIONS
    Inventors: Elise Fournier, Sylvaine Neveu, Joël Racinoux
  • Patent number: 9359215
    Abstract: Precipitated silicas including clusters of large primary silica particles having at the surface thereof small primary silica particles, have a specific surface area CTAB (SCTAB) ranging from 60 to 400 m2/g; a cluster average size d50, as measured by XDC grading after ultrasound deagglomeration, such that d50 (nm)>(6214/SCTAB (m2/g)+23; a pore volume distribution such that V(d5-d50)/V(d5-d100)>0.906?(0.0013×SCATB (m2/g)); and a pore size distribution such that Mode (nm)>(4166/SCTAB (m2/g))?9.2; such silicas are useful reinforcing fillers for polymers.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: June 7, 2016
    Assignee: RHODIA OPERATIONS
    Inventors: Emmanuelle Allain, Julien Hernandez, Lionel Ventelon, Laurent Guy, Marc Airiau
  • Patent number: 9320699
    Abstract: Disclosed are oral care compositions, for example dentifrice compositions, comprising an orally acceptable vehicle, metal oxide particles having an average particle size of no greater than a dentin tubule and a polymeric adherent material for adhering the metal oxide particles in the dentin tubule. The metal oxide particles have a median particle size of 5 microns or less, and may comprise zinc oxide.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: April 26, 2016
    Assignee: Colgate-Palmolive Company
    Inventors: Venda Porter, Andre Morgan, Michael Prencipe, Sarita Mello
  • Patent number: 9203072
    Abstract: A microporous film, characterized in that it is prepared by a method comprising melting and kneading a polyolefin resin, inorganic particles and a plasticizer, forming the resultant mixture into a sheet, subjecting the rejecting the resultant sheet to a biaxial stretching treatment of a surface magnification of not less than 20 and less than 100 times, and then extracting the plasticizer, it has an inorganic particle content of 20 to 60 mass %, and it exhibits a piercing strength of 3.0 N/20 ?m or more.
    Type: Grant
    Filed: August 29, 2005
    Date of Patent: December 1, 2015
    Assignee: ASAHI KASEI CHEMICALS CORPORATION
    Inventors: Hiroshi Hatayama, Hiroshi Sogo
  • Publication number: 20150147469
    Abstract: A method of producing silica-based particles includes, when a dispersion liquid of composite oxide particles is prepared by simultaneously adding an aqueous silicate solution and/or an acidic silicic acid solution and an aqueous solution of an alkali-soluble inorganic compound in an alkali aqueous solution or in an alkali aqueous solution with seed particles dispersed therein, if required, the aqueous silicate solution and/or the acidic silicic acid solution and the aqueous solution of alkali-soluble inorganic compound are added so that the molar ratio of MOx/SiO2 are in a range from 0.01 to 2, herein MOx denoting an inorganic oxide other than silica and SiO2 denoting silica to prepare the dispersion liquid of composite oxide particles with an average diameter (Dp1) in a range from 3 to 300 nm.
    Type: Application
    Filed: January 28, 2015
    Publication date: May 28, 2015
    Inventors: Ryo MURAGUCHI, Mitsuaki KUMAZAWA, Toshiharu HIRAI
  • Publication number: 20150132209
    Abstract: A process for preparing precipitated silica, in which a silicate is reacted with an acidifying agent in order to obtain a suspension of precipitated silica (S1), followed by: a separation step in order to obtain a cake, a cake-disintegration step in order to obtain a suspension of precipitated silica (S2), and a suspension drying step. According to the invention, a membrane concentration step is performed between the disintegration step and the drying step.
    Type: Application
    Filed: March 21, 2013
    Publication date: May 14, 2015
    Inventors: Sylvaine Neveu, Anne-Laure Pinault
  • Publication number: 20150132577
    Abstract: Precipitated silica specifically useful in the paper industry and in particular in paper-coating applications for inject printing, is characterized by an uptake of DOP oil lower than 260 ml/100 g, a pore volume (Vd25) of greater than 0.8 ml/g formed by pores having a diameter of less than 25 nm, a CTAB specific surface area of greater than 280 m2/g.
    Type: Application
    Filed: October 9, 2014
    Publication date: May 14, 2015
    Inventors: PIERRE-YVES LAHARY, YVONICK CHEVALLIER, REMI VALERO
  • Publication number: 20150125376
    Abstract: A unique method for preparing precipitated silica entails reacting a silicate with an acidifying agent to obtain a suspension of precipitated silica, and separating and drying the suspension, and further wherein the precipitation includes contacting a silicate with an acidifying agent in an acidic medium in a fast blender.
    Type: Application
    Filed: October 8, 2014
    Publication date: May 7, 2015
    Inventors: Elise FOURNIER, JEAN-CLAUDE MAGNE, FRANCOIS NICOL
  • Publication number: 20150110700
    Abstract: A process for preparing precipitated silica comprising a reaction of a silicate with an acidifying agent to obtain a suspension of precipitated silica (S1), followed by a separation step to obtain a cake, a disintegration step of said cake to obtain a suspension of precipitated silica (S2), and a drying step of this suspension, wherein the disintegration step is performed by mixing using a twin-screw mixer or by extrusion.
    Type: Application
    Filed: March 21, 2013
    Publication date: April 23, 2015
    Inventors: Sylvaine Neveu, Anne-Laure Pinault, Philippe Jost
  • Publication number: 20150098883
    Abstract: The present invention disclosed use of lactam as a solvent in the preparation of nanomaterials by precipitation method, sol-gel method or high temperature pyrolysis. These methods are able to recycle lactam solvent, which meet requirements of environmental protection.
    Type: Application
    Filed: January 19, 2012
    Publication date: April 9, 2015
    Applicant: SHANGHAI GENIUS ADVANCED MATERIAL (GROUP) CO., LTD.
    Inventors: Housheng Xia, Guisheng Yang
  • Patent number: 8992873
    Abstract: The present invention provides a method of producing hollow silica particles. First, an amine-ketimine compound is mixed with water to obtain a hydrophobic core dispersion, and then an organic siloxane compound and/or a coupling reagent is added into the hydrophobic core dispersion to form a core-shell silica dispersion. Then, the core-shell silica precipitate is separated from the core-shell silica dispersion, and then it is further dispersed and washed by a low carbon alcohol solution. Finally, hollow silica particles in accordance with the present invention are produced. In addition, the present invention also provides hollow silica particles produced by the afore-mentioned method without using any additional surfactant.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: March 31, 2015
    Assignee: National Chin-Yi University of Technology
    Inventors: Hsu-Tung Lu, Mei-Hui Tsai, I-Hsiang Tseng, Shih-Liang Huang
  • Publication number: 20150086463
    Abstract: Disclosed herein is a continuous process for preparing a silica product, comprising: (a) continuously feeding an acidulating agent and an alkali metal silicate into a loop reaction zone comprising a stream of liquid medium; wherein at least a portion of the acidulating agent and the alkali metal silicate react to form a silica product in the liquid medium of the loop reaction zone; (b) continuously recirculating the liquid medium through the loop reaction zone; and (c) continuously discharging from the loop reaction zone a portion of the liquid medium comprising the silica product. Silica products and dentifrice compositions comprising the silica products are also disclosed. A continuous loop reactor is also disclosed.
    Type: Application
    Filed: December 2, 2014
    Publication date: March 26, 2015
    Inventors: William J. Hagar, Karl W. Gallis
  • Patent number: 8986837
    Abstract: A method for preparing precipitated silica includes the reaction of sodium metabisulfite or sodium sulfite with sand, wherein a) sand is mixed with sodium metabisulfite or sodium sulfite; b) the mixture thus obtained is melted to produce solid sodium silicate and sulfurous anhydride; c) the solid sodium silicate is dissolved in water to provide a sodium silicate aqueous solution, d) the sulfurous anhydride is reacted with the sodium silicate aqueous solution to provide a mixture containing precipitated silica; and e) the precipitated silica is separated from said mixture.
    Type: Grant
    Filed: July 3, 2009
    Date of Patent: March 24, 2015
    Assignee: Rhodia Operations
    Inventors: Anne-Laure Pinault, Joël Racinoux, Petro Pechkurov
  • Patent number: 8986642
    Abstract: The present invention relates to spherical beads comprising at least one metal and/or semimetal oxide, having a mean diameter in the range from 10 to 120 ?m, a BET surface area in the range from 400 to 800 m2/g and a pore volume in the range from 0.3 to 3.0 cm3/g, wherein the diameter of a given bead at any one point of said bead deviates by less than 10% from the average diameter of said bead and the surface of said bead is substantially smooth, and also to a process for producing these spherical beads, to a particulate catalyst comprising the spherical beads and to the use of the spherical beads as catalysts or catalyst carriers.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: March 24, 2015
    Assignee: BASF SE
    Inventors: Angela Siegel, Tobias Eckardt, Andreas Braedikow, Thorsten Puvogel
  • Publication number: 20150078979
    Abstract: A process for preparing precipitated silica comprising a reaction of a silicate with an acidifying agent to obtain a suspension of precipitated silica (S1), followed by a step of separation to obtain a cake, a step of spalling said cake to obtain a suspension of precipitated silica (S2) and a step of drying said suspension, wherein the spalling step is carried out at a temperature of between 50 and 120° C.
    Type: Application
    Filed: March 21, 2013
    Publication date: March 19, 2015
    Inventors: Elise Fournier, Sylvaine Neveu, Joël Racinoux
  • Publication number: 20150056120
    Abstract: A process for preparing precipitated silica comprising a reaction of a silicate with an acidifying agent to obtain a suspension of precipitated silica, followed by a step of separation to obtain a cake and a step of drying said cake, wherein a step of compaction of said cake at a pressure greater than 10 bars is carried out between the step of separation and the step of drying.
    Type: Application
    Filed: March 21, 2013
    Publication date: February 26, 2015
    Inventors: Sylvaine Neveu, Anne-Laure Pinault
  • Patent number: 8962075
    Abstract: A method for manufacturing a hollow metal sphere with a mesoporous structure is disclosed, which comprises the following steps: (A) providing a hollow sphere template with a mesoporous structure, wherein the hollow sphere template comprises: a first shell with plural channels penetrating the first shell, the material of the first shell comprises a mesoporous silica material, and the mesoporous silica material has a cubic Ia3d symmetry pore structure; (B) mixing the hollow sphere template with a metal precursor; (C) reducing the metal precursor; and (D) removing the hollow sphere template to obtain a hollow metal sphere with a mesoporous structure. In addition, the present invention also provides a hollow metal sphere with a mesoporous structure prepared by the aforementioned method.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: February 24, 2015
    Assignee: National Tsing Hua University
    Inventors: Chia-Min Yang, Bo-Kai Chen, You-Wei Hu
  • Patent number: 8962519
    Abstract: The present invention relates to novel precipitated silicic acids for use as support materials, manufacture thereof and use thereof.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: February 24, 2015
    Assignee: Evonik Degussa GmbH
    Inventors: Frank Heindl, Claus-Peter Drexel, Frank Haselhuhn
  • Publication number: 20150037235
    Abstract: A process for preparing precipitated silicas in which: (i) an aqueous stock with a pH of between 2 and 5 is formed; (ii) silicate and acid are simultaneously added to said stock, such that the pH of the resulting reaction medium is maintained between 2 and 5; (iii) silicate is added until a pH value of between 7 and 10 is obtained; (iv) silicate and acid are simultaneously added, such that the pH of the reaction medium is between 7 and 10; (v) acid is added until a pH value of between 2.5 and 5.3 is obtained; and (vi) the reaction medium is placed in contact with acid and silicate, such that the pH is between 2.5 and 5.3; wherein the acid used in at least one of the process steps is a concentrated acid.
    Type: Application
    Filed: January 23, 2013
    Publication date: February 5, 2015
    Inventors: Emmanuelle Allain, Sylvaine Neveu
  • Publication number: 20150030519
    Abstract: A process for preparing precipitated silica in which: (i) an stock having a concentration of alkali metal M silicate less than 20 g/L is formed; (ii) acid is added to said initial stock, until at least 50% of the amount of M2O is neutralized; (iii) silicate and acid are simultaneously added, such that the degree of consolidation is greater than 4 and at most 100; and (v) acid is added until a pH value of between 2.5 and 5.3 is obtained, wherein the acid used in at least one of the process steps is a concentrated acid.
    Type: Application
    Filed: January 23, 2013
    Publication date: January 29, 2015
    Inventor: Emmanuelle Allain
  • Publication number: 20150030518
    Abstract: The invention relates to a process for the preparation of precipitated silica formed of aggregates of large primary silica particles, at the surface of which occur small primary silica particles, in which the acid used in at least one of the process steps is a concentrated acid.
    Type: Application
    Filed: January 23, 2013
    Publication date: January 29, 2015
    Inventors: Emmanuelle Allain, Sylvaine Neveu
  • Patent number: 8936772
    Abstract: A silica containing composition is disclosed. The silica composition comprising a compound having the following formula (SiO2)x(OH)yMzOaF: wherein M optionally exists and said M is at least one of the following metal or metalloid cations: boron, magnesium, aluminum, calcium, titanium, vanadium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, molybdenum, palladium, silver, cadmium, tin, platinum, gold, and bismuth; wherein F optionally exists and said F is at least one of the following: a functionalized organosilane, a sulfur-containing organosilane, an amine-containing organosilane, and an alkyl-containing organosilane at a surface area coverage of 0.01-100%; and wherein the molar ratio of y/x is equal to 0.01-0.5, the molar ratio of x/z is equal to 0.1-300, and the molar ratio of a/z is dependent on the nature of the metal oxide formed.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: January 20, 2015
    Assignee: Ecolab USA Inc.
    Inventors: Bruce A. Keiser, Nicholas S. Ergang, Richard Mimna
  • Patent number: 8932549
    Abstract: A silica-containing composition is disclosed. The composition comprises a compound having the following formula: (SiO2)x(OH)yMzOaF.B: wherein M is at least one of the following: boron, magnesium, aluminum, calcium, titanium, vanadium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, molybdenum, palladium, silver, cadmium, tin, platinum, gold, and bismuth; wherein F optionally exists and comprises at least one of the following: a functionalized organosilane, a sulfur-containing organosilane, an amine-containing organosilane, and an alkyl-containing organosilane at a surface area coverage of about 0.01 to about 100%. The molar ratio of y/x is equal to about 0.01 to about 0.5, the molar ratio of x/z is equal to about 0.5 to about 300, and the molar ratio of a/z is dependent on the nature of the metal oxide. B comprises a hygroscopic solid and preferably comprises at least one alkaline earth oxide, lanthanide oxide, or combinations thereof.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: January 13, 2015
    Assignee: Ecolab USA Inc.
    Inventors: Nicholas S. Ergang, Ian Saratovsky, Hung-Ting Chen
  • Patent number: 8916122
    Abstract: A method of producing alkoxysilanes and precipitated silicas from biogenic silicas is provided. In a first step, biogenically concentrated silica is mixed with a liquid polyol to obtain a mixture, and then the mixture is heated. In a second step, a base is added to obtain a reaction mixture. In a third step, the reaction mixture is filtered to remove the carbon enriched RHA or other undissolved biogenic silica and recover the solution of alkoxysilane and alcoholate. In a fourth step, alkoxysilane is purified by filtering, distilling, precipitating or extracting from the original reaction solution to precipitate various forms of silica. In a final step, residual base present in alkoxysilane is neutralized to eliminate the residual alkali metal base.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: December 23, 2014
    Assignee: Mayaterials, Inc.
    Inventors: Richard M. Laine, Julien C. Marchal, Vera Popova, David J. Krug
  • Patent number: 8911638
    Abstract: Stable, pourable silicon dioxide dispersion, in which the average, number-related aggregate diameter of the silicon dioxide particles in dispersion is less than 200 nm, and which comprises at least 35 wt. % of a silicon dioxide powder, 3 to 35 wt. % of at least one polyol, 20 to 60 wt. % of water, 0 to 10 wt. % of an additive and a substance having an alkaline action in an amount such that a pH of 10<pH<12 is established. It can be prepared by a procedure in which silicon dioxide powder is introduced into water and a polyol in a rotor/stator machine, the pH being less than 5, and the mixture is dispersed until the current uptake of the rotor/stator machine is largely constant, and a substance having an alkaline action is subsequently added in an amount such that a pH of the dispersion of 10<pH<12 results, the substance having an alkaline reaction being added so rapidly that no gel formation takes place.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: December 16, 2014
    Assignee: Degussa AG
    Inventors: Wolfgang Lortz, Christoph Batz-Sohn, Helmut Mangold, Gabriele Perlet, Werner Will, Sascha Reitz
  • Publication number: 20140295165
    Abstract: A process comprising: A) contacting one or more of sources of silicon oxide, selected from water sol-uble.silica sources arid alkali metal silicates, with an aqueous reaction medium, comprising one or more nonionic surfactants and thereby forming mesoporous structures comprising crosslinked silicon oxide units, wherein said cross-linked silicon oxide units have pores of about 1 to about 100 nanometers and wherein the aqueous reaction medium exhibits a pH of about 0 to about 4.0; B) exposing the aqueous reaction medium containing the mesoporous structures to elevated temperatures for a time sufficient to achieve the desired structure and pore size. Preferred water soluble silica sources comprise silicic acid, or po!ysilicic acids, The aqueous reaction, medium is prepared by combining one or more nonionic surfactants and water, theteby forming an aqueous, reaction medium. comprising micelles. Preferably, the aqueous reaction medium further comprises, a.
    Type: Application
    Filed: November 19, 2012
    Publication date: October 2, 2014
    Applicant: Dow Global Technologies LLC
    Inventors: Beata A. Kilos, Cathy L. Tway, Scott T. Matteucci, Christopher J. Tucker, Anne M. Kelly-Rowley
  • Publication number: 20140286847
    Abstract: A method of producing silica from geothermal fluid containing concentration of the silica of less than 1000 ppm includes the steps of treating the geothermal fluid containing the silica by reverse osmosis treatment thereby producing a concentrated fluid containing the silica, seasoning the concentrated fluid thereby producing a slurry having precipitated colloids containing the silica, and separating the silica from the slurry.
    Type: Application
    Filed: June 6, 2014
    Publication date: September 25, 2014
    Inventor: William L. Bourcier
  • Patent number: 8840859
    Abstract: A method of producing silica from geothermal fluid containing low concentration of the silica of less than 275 ppm includes the steps of treating the geothermal fluid containing the silica by reverse osmosis treatment thereby producing a concentrated fluid containing the silica, seasoning the concentrated fluid thereby producing a slurry having precipitated colloids containing the silica, and separating the silica from the slurry.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: September 23, 2014
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: William L. Bourcier, Carol J. Bruton
  • Publication number: 20140271749
    Abstract: Disclosed herein are silica materials comprising an adduct on at least a portion of a surface thereof. The silica materials are capable of binding volatile sulfur compounds (VSC)s and thereby reducing oral malodor. Also disclosed are dentifrice compositions, oral care compositions comprising the silica materials, and methods of making and using the silica materials.
    Type: Application
    Filed: May 29, 2014
    Publication date: September 18, 2014
    Applicant: J.M. Huber Corporation
    Inventors: Karl W. Gallis, Terry W. Nassivera, William H. Pitcock, JR.
  • Patent number: 8790608
    Abstract: Non-spherical siliceous particles having a plurality of porous branches are disclosed and claimed. The porous branches are randomly oriented and elongated, ring-like, and/or aggregated. An additive introduced during synthesis of the particles modifies pore volume and morphology. The tunability of the pore volume includes an inner diameter ranging from about 2 ? to about 50,000 ?. Synthesizing the particles includes mixing under constant or intermittent stirring in a reaction vessel an aqueous silicic acid solution with an acidic heel solution to form a mixture. The stirring may optionally be performed at a variable speed. An additive is introduced into the mixture at a controlled rate, wherein the additive imposes a pH change from a lower pH to a higher pH to the mixture to induce siliceous particle precipitation.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: July 29, 2014
    Assignee: Nalco Company
    Inventors: Brian T. Holland, Sascha Welz
  • Patent number: 8747793
    Abstract: The present invention relates to a hollow sphere with a mesoporous structure, and a method for manufacturing the same. The hollow sphere with a mesoporous structure comprises: a shell with plural mesopores penetrating the shell, wherein the shell comprises: a mesoporous silicon oxide material, and mesopores of the mesoporous silicon oxide material are arranged in Ia3d cubic symmetry. In addition, according to the method of the present invention, the aforementioned hollow sphere with the mesoporous structure can be easily obtained by use of mixed surfactants of a cationic surfactant and a non-ionic surfactant.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: June 10, 2014
    Assignee: National Tsing Hua University
    Inventors: Chia-Min Yang, Li-Lin Chang, Pei-Hsin Ku, Nien-Chu Lai, Kuan-Yi Li
  • Patent number: 8729158
    Abstract: The invention provides fumed silica comprising aggregates that have an aggregate size and a surface area that satisfy particular formulas relating aggregate size to surface area, as well as aggregates that exhibit particular viscosity, power law exponent index, and/or elastic modulus characteristics when dispersed in liquid media. The invention also provides processes of preparing such fumed silica by combining a silica precursor with a stream of combustible gas, combusting the stream, and producing a stream of combusted gas and fumed silica particles, wherein dopants are introduced, the time/temperature profile, or history, of the stream of combusted gas and fumed silica particles is adjusted to allow for post-quench aggregate growth, and/or additional silica precursor is introduced into the stream of combusted gas.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: May 20, 2014
    Assignee: Cabot Corporation
    Inventors: Sheldon B. Davis, Angelica M. Sanchez Garcia, David Matheu, Yakov E. Kutsovsky
  • Patent number: 8709991
    Abstract: The current disclosure relates to a silica-based particle containing at least approximately 5% silica by solid weight, at least approximately 15% alkali metal salt by solid weight; and at least approximately 15% water by total weight. Another embodiment of the disclosure relates to a detergent containing a silica/alkali metal salt particle and also containing at least a surfactant. Still another embodiment relates to a method of producing a silica/alkali metal salt particle. According to the method, one may combine a metal silicate and an amount of at least one acid source sufficient to form silica from the silicate and at least one alkali metal salt from the metal and acid, precipitate the silica to form precipitated silica, and, without washing the precipitated silica to remove the alkali metal salt, form a particle comprising the precipitated silica and at least approximately 15% alkali metal salt by solid weight.
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: April 29, 2014
    Assignee: Paben Proyectos Estrategicos, S.A. de C.V.
    Inventor: Enrique Hernandez
  • Patent number: 8697020
    Abstract: The present invention relates to silica magnetic particles having a spherical form and a process for preparing the same. The silica magnetic particles prepared according to the present invention, which are silica particles that includes the magnetic particles and additionally have the functional group on the surfaces, has an advantage that the particle size distribution is uniform. Further, the silica magnetic particles prepared according to the present invention can be used as a reagent for separating biomaterials and a reagent for detecting biomaterials.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: April 15, 2014
    Assignee: Bioneer Corporation
    Inventors: Jae-Ha Kim, Jong-Gwang Park, Jong-Hoon Kim, Han-Oh Park
  • Publication number: 20140079620
    Abstract: The present invention relates to a method of purifying strong acids or strongly acidic media to remove di- and higher valent metal ions, which can be used within the context of the production of high-purity silica. The invention further relates to the use of special ion exchangers for carrying out the method according to the invention and the resultant high-purity silicas.
    Type: Application
    Filed: February 10, 2012
    Publication date: March 20, 2014
    Applicant: EVONIK DEGUSSA GMBH
    Inventors: Christian Panz, Florian Paulat, Guido Titz, Sven Müller, Peter Erlhöfer, Markus Ruf, Bodo Frings, Hartwig Rauleder, Thomas Barthel, Mustafa Siray, Jürgen Behnisch
  • Patent number: 8647599
    Abstract: The present invention relates to a process for preparing TiO2/SiO2 mixed oxides or the hydrates and/or oxide hydrates thereof comprised of 0.5 to 95 wt % SiO2 and the balance as TiO2, each referring to the completely calcined product, by using titanium alcoholates and aqueous silica sol. Moreover, the invention relates to the use of these mixed oxides as catalyst carriers.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: February 11, 2014
    Assignee: Sasol Germany GmbH
    Inventors: Jurgen Schimanski, Kai Dallmann, Sohnke Rolfs, Kai Dolling, Andrea Brasch, Ute Freese
  • Patent number: 8623312
    Abstract: To provide a process for producing a dispersion of hollow fine SiO2 particles which contains no residual core fine particles, generates no uncontrollable agglomerates, and is easy to filtrate.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: January 7, 2014
    Assignee: Asahi Glass Company, Limited
    Inventors: Kawai Yohei, Yoneda Takashige
  • Patent number: 8617504
    Abstract: Hydrophilic precipitated silicas which combine a particularly low initial moisture content with low moisture absorption over time, a low tapped density and a low silanol group density, have the following physicochemical parameters: equilibrium moisture content (at 70% relative humidity/20° C.) of 0.5%-5.0% by weight, based on the weight of the hydrophilic precipitated silica, BET surface area of 50-250 m2/g, CTAB surface area of 50-250 m2/g, and DBP (anhydrous) of 200-350 g/100 g.
    Type: Grant
    Filed: May 29, 2007
    Date of Patent: December 31, 2013
    Assignee: Evonik Degussa GmbH
    Inventors: Christian Panz, Helga Obladen, Rene Allerdisse, Karl Meier, Markus Ruf, Michael Kempf, Mario Scholz, Dieter Kuhn
  • Patent number: 8614256
    Abstract: A hydrophobic precipitated silica having a BET of less than 110 m2/g, a CTAB of less than 150 m2/g, a BET/CTAB ratio of less than 3, a carbon content of greater than 3.1%, a pH of 9.7 to 10.5, a DBP of less than 230 g/(100 g), and a methanol wettability of more than 50%. The hydrophobic precipitated silica is used in compositions including defoamers, silicone rubber and HTV crosslinkable silicone rubber compositions. The hydrophobic precipitated silica is also useful as a flow assistant and carrier or anti-blocking agent.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: December 24, 2013
    Assignee: Evonik Degussa GmbH
    Inventors: Christian Panz, Rene Allerdisse, Helga Obladen, Mario Loebbus, Anja Lukas, Roland Bergmann, Karl Meier
  • Patent number: 8596468
    Abstract: New silica gel materials and novel methods of producing such are provided. The method itself entails a manner of mixing the reactants together in a one-pot process such that the time required for aging is reduced without compromising the ability to target pore size production. In such a way, the pH of the reaction drives pore size development, thereby permitting a more efficient process to be followed in terms of expensive drying/heating steps being reduced timewise, if not altogether. Furthermore, in one embodiment, the resultant gel materials exhibit a certain pore size minimum while simultaneously exhibiting a degree of softness heretofore unavailable. As such, not only is this novel method more efficient in silica gel manufacture, but the resultant materials are completely novel as well. The gel materials made therefrom may be utilized in a variety of different end uses, such as cooking oil filtration, soft skin cleansers, dental abrasives, and the like.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: December 3, 2013
    Assignee: J.M. Huber Corporation
    Inventors: Duen-Wu Hua, Gary W. Loock