Hydroxide Patents (Class 423/629)
  • Patent number: 10676587
    Abstract: A heat conductive sheet comprising a cured product layer of a heat conductive silicone composition on one or both surfaces of a glass cloth sealed using a cured product of a heat conductive resin composition. The heat conductive silicone composition includes an organic silicon compound component and an aspherical heat conductive filler. The amount of the heat conductive filler is 250 to 600 parts by mass with respect to 100 parts by mass of the organic silicon compound component, and the heat conductive filler has a DOP oil absorption of not more than 80 ml/100 g. The heat conductive sheet can be continuously manufactured by coating molding and wound into a roll even with the use of an inexpensive aspherical heat conductive filler, and has high heat conductivity, low thermal contact resistance, and high insulating properties.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: June 9, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akihiro Endo, Yasuhisa Ishihara, Toru Tsuchiya, Hisaharu Yamaguchi, Masahiro Moteki, Takahiro Maruyama
  • Publication number: 20150129490
    Abstract: Processes for manufacturing low soluble iron diatomite filter aids and such filter aids are disclosed. Aluminum oxide and/or aluminum hydroxide are used as additives when preparing the flux-calcined diatomite filter aids. As compared to either straight-calcined or soda ash flux-calcined diatomite filter aids of similar permeabilities made from the same ore, the disclosed filter aids have lower soluble iron levels. For instance, disclosed filter aids of about 0.5 to about 2.0 Darcy were made using either an aluminum oxide or aluminum hydroxide additive with soda ash. The disclosed filter aids may have an EBC soluble iron content of less than 80 ppm versus 130 ppm for similar filter aids that were made from the same ore and flux-calcined with just soda ash.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 14, 2015
    Applicant: EP MINERALS, LLC
    Inventors: Qun Wang, David Scott Keselica, Kimberly Walsh, Peter Edward Lenz, Chongjun Jiang, Bradley Scott Humphreys
  • Publication number: 20150117953
    Abstract: Provided is a practically valuable and economically excellent insolubilizing material for a specific toxic substance: that is useful for insolubilizing treatment for a heavy metal or the like conducted by applying the insolubilizing material for a specific toxic substance to soil or on the surface of the soil; that is capable of effectively insolubilizing and immobilizing the heavy metal or the like; that is capable of making treated matter neutral so as to be reusable and environment-friendly; and moreover that is capable of imparting strength to the treated matter as necessary; and with which the heavy metal or the like is not re-eluted even when the treated matter is exposed to an environment under a neutral condition or an acidic condition.
    Type: Application
    Filed: March 28, 2013
    Publication date: April 30, 2015
    Inventors: Masato Yamaguchi, Shinichi Miura, Yusuke Ichino, Saburo Ishii, Kazuomi Kitsuda
  • Publication number: 20150017090
    Abstract: The present invention provides an aluminum hydroxide powder having a predetermined cumulative pore volume which falls within a range suited for the production of a high purity alumina, and a method for producing the same. It is possible to produce an aluminum hydroxide powder having high bulk density and high firing efficiency, and an aluminum hydroxide having high shape retention.
    Type: Application
    Filed: March 6, 2013
    Publication date: January 15, 2015
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Ayumi Hyojo, Kensen Okusako, Norifumi Azuma, Koji Yamamoto, Yoshitaka Kawakami
  • Patent number: 8926939
    Abstract: The invention provides methods and compositions for the addition of a CGM to precipitation liquor of a Bayer process. The CGM comprises a neopolyol, an ester derived from a neopolyol, and/or an ether derived from a neopolyol. Optionally the CGM may comprise water and/or an antifoaming agent and/or a hydrocarbon carrier liquid. The CGM is quite effective and results in a significant increase in mean particle size of produced alumina crystals.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: January 6, 2015
    Assignee: Ecolab USA Inc.
    Inventors: Dmitri L. Kouznetsov, Jianjun Liu, David H. Slinkman
  • Patent number: 8920768
    Abstract: Disclosed herein are compounds, compositions, and methods for producing aluminum hydroxide crystals from a precipitation liquor. The precipitation liquor may be located in a Bayer process.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: December 30, 2014
    Assignee: Ecolab USA Inc.
    Inventors: James Counter, John T. Malito
  • Patent number: 8895468
    Abstract: Provided are methods of making dehydrogenation catalyst supports containing bayerite and silica. Silica-stabilized alumina powder, prepared by spray drying of bayerite powder, precipitating silica in a bayerite slurry with an acid, or impregnation or co-extrusion of bayerite with sodium silicate solution was found to be a superior catalyst support precursor. Catalysts prepared with these silica containing support materials have higher hydrothermal stability than current CATOFIN® catalysts. Also provided is a dehydrogenation catalyst comprising Cr2O3, an alkali metal oxide, SiO2 and Al2O3, and methods of using said catalyst to make an olefin and/or dehydrogenate a dehydrogenatable hydrocarbon.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: November 25, 2014
    Assignee: BASF Corporation
    Inventors: Wolfgang Ruettinger, Richard Jacubinas
  • Patent number: 8822045
    Abstract: The present invention provides methods of protecting a surface of an aluminum nitride substrate. The substrate with the protected surface can be stored for a period of time and easily activated to be in a condition ready for thin film growth or other processing. In certain embodiments, the method of protecting the substrate surface comprises forming a passivating layer on at least a portion of the substrate surface by performing a wet etch, which can comprise the use of one or more organic compounds and one or more acids. The invention also provides aluminum nitride substrates having passivated surfaces.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: September 2, 2014
    Assignee: North Carolina State University
    Inventors: Ramon R. Collazo, Zlatko Sitar, Rafael Dalmau
  • Patent number: 8815206
    Abstract: An aluminum hydroxide gel particle having high purity and extremely high acid reactivity and a production method thereof. The aluminum hydroxide gel particle has an iron (Fe) content of 1 to 10 ppm.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: August 26, 2014
    Assignee: Kyowa Chemical Industry Co., Ltd.
    Inventors: Takafumi Suzuki, Shinjiro Tamagawa
  • Patent number: 8808657
    Abstract: A process for the preparation of amorphous aluminum phosphate or polyphosphate-based pigment by reacting aluminum phosphate and sodium aluminate is provided. The amorphous aluminum phosphate or polyphosphate is characterized by a skeletal density of less than 2.50 grams per cubic centimeter and a phosphorus to aluminum mole ratio of greater than 0.8. In one embodiment, the composition is useful in paints as a substitute for titanium dioxide.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: August 19, 2014
    Assignee: Bunge Amorphic Solutions LLC
    Inventors: Fernando Galembeck, Joao de Brito, Ádamo César Mastrângelo Amaro dos Santos, Renato Rosseto
  • Patent number: 8679427
    Abstract: A process for neutralization is provided which can maintain a high solid content of a bauxite dissolution residual substance slurry even after a neutralization treatment is completed and the stabilize pH within a short time of the neutralization treatment. Such a process for neutralizing a bauxite dissolution residual substance containing a desiliconizing product which is generated in the production process of aluminum hydroxide using Bayer process, includes: mixing a bauxite dissolution residual substance or a bauxite dissolution residual substance slurry with sulfuric acid in an amount ranging from 0.6 to 1.2 equivalence to the total amount of sodium contained in the bauxite dissolution residual substance or a bauxite dissolution residual substance slurry, such that the solid content after mixing becomes 400 to 700 g/l to gelate the mixture, and thereafter obtaining a bauxite dissolution residual substance neutralized slurry.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: March 25, 2014
    Assignee: Showa Denko K.K.
    Inventor: Isao Ishikawa
  • Patent number: 8662173
    Abstract: The present invention relates to methods and compositions that can be used to delay crystallization of a treatment solution so that thief zones or fractures are plugged in subterranean formations at a substantial distance from a wellbore. A supersaturated sodium aluminate solution, or other solutions, are introduced into the reservoir. The solution is relatively stable in the supersaturated state. Crystallization, or de-stabilizing the solution, can be controlled, which in turn plugs the thief zone or fracture at a designed point of time. By controlling the time that crystallization starts, i.e., the induction period, thief zones that are located at a substantial distant from the wellbore can be plugged.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: March 4, 2014
    Assignee: Saudi Arabian Oil Company
    Inventors: Xianmin Joe Zhou, Yun Chang
  • Patent number: 8642001
    Abstract: Aluminum hydroxide flame-retardants and their use.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: February 4, 2014
    Assignee: Albemarle Corporation
    Inventors: Rene Gabriel Erich Herbiet, Norbert Wilhelm Puetz, Volker Ernst Willi Keller, Winfried Toedt
  • Patent number: 8633130
    Abstract: The invention relates to chemical compositions that can be used for hydrocarbon catalytic cracking processes with vanadium as a contaminant, including an active phase formed by different pyrophosphates M2P2O7 (M=Ba or Ca) supported on a mixture of magnesium and aluminum oxide, preferably magnesium aluminate in the spinel phase. The composition captures the metals originating from the charge, particularly vanadium, and thus protects the catalyst. Said composition is preferably used in the form of a separated particle in order to the control the addition thereof to the unit according to the metal content of the charge. The invention also relates to the method for preparing said composition, including synthesis of pyrophosphates, formation of a suspension of boehmite alumina, magnesium oxide or magnesium hydroxide, together with oxides M2P2O7, spray drying and calcination of the microspheres without generating any loss in the crystalline structure of oxides M2P2O7.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: January 21, 2014
    Assignee: Ecopetrol S.A.
    Inventors: Luis Oswaldo Almanza Rubiano, Luis Javier Hoyos Marin, Cesar Augusto Vergel Hernández
  • Patent number: 8633129
    Abstract: The invention relates to a method for preparing a chemical composition obtained by co-impregnating water-soluble salts Ba/Mg and phosphoric acid H3PO4 on boehmite alumina which has been calcined in the presence of water vapor. Said chemical composition is used as an additive in the catalytic cracking process in order to capture metals originating from the charge, particularly vanadium, in the presence of SO2 and thus to protect the activity and selectivity of the catalytic cracking catalyst.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: January 21, 2014
    Assignee: Ecopetrol S.A.
    Inventors: Luis Oswaldo Almanza Rubiano, Luis Javier Hoyos Marin, Cesar Vergel Hernández
  • Patent number: 8603419
    Abstract: The invention concerns a method of treating an alkaline granular carbonatable material which contains aluminium metal and which has in particular a pH of at least 10. The method comprises an oxidation step wherein at least a portion of said aluminium metal is oxidized by contact with moisture. The aluminium should be oxidized to avoid swelling problems when using the granular material as aggregate. In the method according to the invention this oxidation is accelerated by providing at least one oxidizing agent in said moisture, which oxidizing agent has a higher redox potential than the water contained in said moisture. The method further comprises a carbonation step wherein the granular carbonatable material is at least partially carbonated to lower the pH thereof. In this way the formation of ettringite, which may also release aluminium ions which causing further swelling problems, can be avoided in the granular material or any ettringite present therein can be destabilized.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: December 10, 2013
    Assignee: Recoval Belgium
    Inventors: Philippe Descamps, Isabelle Lecomte, Evelyne Nguyen, Dirk Van Mechelen
  • Publication number: 20130296466
    Abstract: The invention relates to a process for the milling-drying of a raw mixture containing aluminum trihydroxide having an average particle size D50 in the range from 50 to 130 ?m and a specific BET surface area in the range from 0.01 to 0.5 m2/g and containing from 0.1 to 20% by weight of water, based on the raw mixture, which comprises the steps i) introduction of the raw mixture into a milling-drying apparatus, ii) introduction of a hot air stream having a temperature in the range from 20 to 100° C. into the milling-drying apparatus so as to flow through the milling-drying apparatus and iii) comminution of the aluminum trihydroxide present in the raw mixture in the milling-drying apparatus.
    Type: Application
    Filed: August 12, 2011
    Publication date: November 7, 2013
    Inventors: Alfred Reimer, Carsten Ihmels, Christian Beer
  • Patent number: 8524192
    Abstract: An aluminum hydroxide gel particle having high purity and extremely high acid reactivity and a production method thereof. The aluminum hydroxide gel particle has an iron (Fe) content of 1 to 10 ppm.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: September 3, 2013
    Assignee: Kyowa Chemical Industry Co., Ltd.
    Inventors: Takafumi Suzuki, Shinjiro Tamagawa
  • Publication number: 20130082205
    Abstract: A fiber product is described which includes fibers, a binder and a temperature control additive. The fiber product has properties that make it useful for a variety of applications. The fibers may be glass fibers and the product may be a fiberglass insulation product for use in buildings, vehicles, or other structures for acoustic and/or thermal insulation. The fibers may be cellulosic fibers and the product may be a wood board product. The temperature control additive is incorporated into the uncured fiber product to prevent deleterious self-heating during or after binder curing. The temperature control additive undergoes an endothermic process that consumes at least a portion of the energy generated during the exothermic curing reaction.
    Type: Application
    Filed: June 6, 2011
    Publication date: April 4, 2013
    Applicant: KNAUF INSULATION SPRL
    Inventors: Gert R. Mueller, Charles Fitch Appley
  • Patent number: 8337803
    Abstract: Compositions and methods suitable for removing poisonous metals from hydrocarbons are provided. The compositions comprise hydrotalcite having one or more trapping metals dispersed on the outer surface thereof.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: December 25, 2012
    Assignee: Albemarle Netherlands B.V.
    Inventors: Julie Ann Francis, Charles Vadovic
  • Patent number: 8293816
    Abstract: Provided is a mixed aluminum hydroxide powder suitable as a filler to be filled into a resin or the like, particularly suitable in an application where the filler is desired to be filled in a large amount, and enabling the production of a molded article excellent in strength properties. The mixed aluminum hydroxide powder is obtained by mixing an aluminum hydroxide powder X having an average secondary particle diameter in the range of 5 to 16 ?m and a shape coefficient of 4 or less, and an aluminum hydroxide powder Y having an average secondary particle diameter in the range of 0.5 to 2.0 ?m and a shape coefficient of 4 or less, the mixed aluminum hydroxide powder being adjusted so as to have an average secondary particle diameter in the range of 0.9 to 12 ?m.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: October 23, 2012
    Assignee: Nippon Light Metal Company, Ltd.
    Inventors: Kazuyuki Yamamoto, Takahiro Kuroda, Toshihiro Matsuba
  • Patent number: 8287826
    Abstract: A method of purifying an aluminum source includes dissolving an aluminum ion source to provide a first solution including aluminum ions having a pH of not greater than 4.0, adjusting the pH of the first solution with a tetraalkylammonium hydroxide solution to a pH in range of 4.1 to 8.4 thereby forming an aluminum hydroxide precipitate, separating the aluminum hydroxide precipitate from the first solution, washing the separated aluminum hydroxide precipitate with an aqueous solution having a pH in a range of 4.1 to 8.4, dissolving the washed aluminum hydroxide precipitate using an acid to provide a second solution having a pH of not greater than 4.0, and forming an aluminum salt from the second solution.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: October 16, 2012
    Assignee: EEStor, Inc.
    Inventor: Lucas Pettey
  • Patent number: 8226924
    Abstract: A method for producing boehmite particles includes subjecting powder of aluminum hydroxide to hydrothermal reaction together with a nucleation agent, thereby obtaining boehmite particles having an average primary particle size of 0.6 ?m or less and including primary particles each having a hexahedral shape. A method for producing alumina particles includes: drying the boehmite particles produced by the above described method; calcining the boehmite particles, which have been dried, to obtain alumina particles; and disintegrating the obtained alumina particles.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: July 24, 2012
    Assignee: Fujimi Incorporated
    Inventors: Hitoshi Morinaga, Muneaki Tahara, Keiji Ashitaka
  • Patent number: 8216543
    Abstract: Methods of making unique water treatment compositions are provided. In one embodiment, a method of making a doped metal oxide or hydroxide for treating water comprises: disposing a metal precursor solution and a dopant precursor solution in a reaction vessel comprising water to form a slurry; and precipitating the doped metal oxide or hydroxide from the slurry.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: July 10, 2012
    Assignees: Inframat Corporation, University of Houston
    Inventors: Huimin Chen, Dennis A. Clifford, Meidong Wang, T. Danny Xiao
  • Publication number: 20120159991
    Abstract: A fining agent for reducing the concentration of seeds or bubbles in a silicate glass. The fining agent includes at least one inorganic compound, such as a hydrate or a hydroxide that acts as a source of water. In one embodiment, the fining agent further includes at least one multivalent metal oxide and, optionally, an oxidizer. A fusion formable and ion exchangeable silicate glass having a seed concentration of less than about 1 seed/cm3 is also provided. Methods of reducing the seed concentration of a silicate glass, and a method of making a silicate glass having a seed concentration of less than about 1 seed/cm3 are also described.
    Type: Application
    Filed: January 9, 2012
    Publication date: June 28, 2012
    Inventors: Matthew John Dejneka, Sinue Gomez
  • Patent number: 8138255
    Abstract: A heat-resistant aluminum hydroxide which is prepared by subjecting a mixture of aluminum hydroxide with a reaction retardant for retarding the conversion aluminum hydroxide to boehmite, as a raw material, to the hydrothermal treatment or to pressurization and heating in a steam atmosphere; and a method for preparing a heat-resistant aluminum hydroxide which comprises subjecting a mixture of aluminum hydroxide with a reaction retardant for retarding the conversion aluminum hydroxide to boehmite as a raw material to the hydrothermal treatment, or to pressurization and heating in a steam atmosphere.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: March 20, 2012
    Assignee: Kawai-Lime Ind. Co. Ltd.
    Inventors: Hirofumi Mitsunaka, Kenji Kido, Hirokazu Kihou
  • Publication number: 20110315434
    Abstract: The object of the present invention is to provide an aluminum hydroxide powder for filling in resin, which is excellent fillability in resin. Provided is an aluminum hydroxide powder forfilling in resin, being characterized in that it comprises a gibbsite crystal structure.
    Type: Application
    Filed: February 12, 2010
    Publication date: December 29, 2011
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventor: Yusuke Kawamura
  • Publication number: 20110280778
    Abstract: The present invention relates to a method of precipitation of metal ions. Mineral(s), oxide(s), hydroxide(s) of magnesium and/or calcium are adopted as raw materials, and the raw material(s) is processed through at least one step of calcination, slaking, or carbonization to produce aqueous solution(s) of magnesium bicarbonate and/or calcium bicarbonate, and then the solution(s) is used as precipitant(s) to deposit rare earth, such as nickel, cobalt, iron, aluminum, gallium, indium, manganese, cadmium, zirconium, hafnium, strontium, barium, copper and zinc ions. And at least one of metal carbonates, hydroxides or basic carbonates is obtained, or furthermore the obtained products are calcined to produce metal oxides. The invention takes the cheap calcium and/or magnesium minerals or their oxides, hydroxides with low purity as raw materials to instead common precipitants such as ammonium bicarbonate and sodium carbonate etc.
    Type: Application
    Filed: February 9, 2010
    Publication date: November 17, 2011
    Inventors: Xiaowei Huang, Zhiqi Long, Hongwei Li, Dali Cui, Xinlin Peng, Guilin Yang, Yongke Hou, Chunmei Wang, Shunli Zhang
  • Patent number: 8048400
    Abstract: There is provided a process for the preparation of a alumina precursor powder from aluminum hydroxide powder obtained by hydrolysis of aluminum alkoxide which precursor enables to provide alumina powder with a high volumetric efficiency. Such process comprises mixing aluminum hydroxide powder obtained by hydrolysis of an aluminum alkoxide with the following aqueous medium so as to obtain an aluminum hydroxide mixed slurry and then drying the aluminum hydroxide mixed slurry: aqueous medium: water or a medium mixture of water and a water-soluble alcohol wherein a water content in said medium mixture is not less than 15 parts by weight to 100 parts by weight of the medium mixture.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: November 1, 2011
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Noriaki Fujita, Shinji Fujiwara
  • Publication number: 20110256051
    Abstract: A production method comprising the steps of: spraying an aluminum hydroxide powder having a specific surface area measured by a nitrogen adsorption method of 0.3 m2/g or more and 3 m2/g or less; a ratio of an average particle diameter D50, which is a particle diameter at which 50% by weight of particles from the finest particle side are accumulated in a particle diameter distribution measured by a laser diffraction scattering method, to a sphere conversion particle diameter Dbet calculated from a specific surface area, of 10 or less; and the average particle diameter D50 of 2 ?m or more and 100 ?m or less, into flames, and then collecting it in the form of a powder to give a spherical alumina powder having a small specific surface area and a low uranium content, and capable of providing high thermal conductivity to resin compositions.
    Type: Application
    Filed: April 14, 2011
    Publication date: October 20, 2011
    Applicants: SUMITOMO CHEMICAL COMPANY, LIMITED, Nippon Steel Materials Co., Ltd.
    Inventors: Kiyoshi Sawano, Atsuhiko Imai, Takayuki Kashihara, Yusuke Kawamura, Hiroshi Takahashi
  • Patent number: 8007759
    Abstract: A static ion-exchange process for the preparation of a polynuclear Al species comprising the treatment of an aqueous aluminum chloride solution with a hydroxide-form ion-exchange resin at a temperature of from 5° C. to 60° C. for a period of at least 30 minutes.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: August 30, 2011
    Assignee: Conopco Inc.
    Inventors: Olivier Deschaume, Carole Celia Perry, Kirill Shafran
  • Patent number: 7993623
    Abstract: Compositions and methods suitable for removing poisonous metals from hydrocarbons are provided. The compositions comprise hydrotalcite having one or more trapping metals dispersed on the outer surface thereof.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: August 9, 2011
    Assignee: Albemarle Netherlands B.V.
    Inventors: Julie Ann Francis, Charles Vadovic
  • Patent number: 7976820
    Abstract: An improved method and composition for producing aluminum hydroxide crystals in a Bayer process pregnant liquor, involve the addition of an emulsified crystallization modifier comprising a C8-C10 fatty acid, precursors, salts or blends thereof. The alkyl chain of the fatty acid crystallization modifier is free of functional groups. The modifier yields a commercially viable product in the presence and absence of a hydrocarbon oil which dissolves the fatty acid. Further, the modifier, prepared in either an emulsified form or as a fatty acid neat, facilitates formation of oxalate aggregates greater than 200 ?m which may be readily screened out with minimum trihydrate loss.
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: July 12, 2011
    Assignee: Nalco Company
    Inventors: Jianjun Liu, James A Counter, Dmitri L Kouznetsov, David H Slinkman
  • Patent number: 7976821
    Abstract: An improved method and composition for producing aluminum hydroxide crystals from precipitation liquor, involves the addition of an emulsified crystal growth modifier comprising a C8-C10 fatty acid, precursors, salts or blends thereof. The emulsified crystal growth modifier also facilitates an upward shift in particle size distribution of aluminum hydroxide and an upward shift in oxalate ball size.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: July 12, 2011
    Assignee: Nalco Company
    Inventors: Jianjun Liu, James A Counter, Dmitri L Kouznetsov, David H Slinkman
  • Publication number: 20110142749
    Abstract: An aluminum hydroxide gel particle having high purity and extremely high acid reactivity and a production method thereof. The aluminum hydroxide gel particle has an iron (Fe) content of 1 to 10 ppm.
    Type: Application
    Filed: August 7, 2009
    Publication date: June 16, 2011
    Inventors: Takafumi Suzuki, Shinjiro Tamagawa
  • Patent number: 7960463
    Abstract: Particular embodiments are directed toward a rubber mixture comprising (i) a rubber; and (ii) a filler component, where the filler component includes a filler selected from the group consisting of amorphous aluminum hydroxycarbonate, amorphous aluminum hydroxyoxycarbonate, and amorphous aluminum oxycarbonate, where said amorphous aluminum hydroxycarbonate, amorphous aluminum hydroxyoxycarbonate, and amorphous aluminum oxycarbonate are characterized by a BET specific surface area of less than 40 m2/g.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: June 14, 2011
    Assignee: Bridgestone Corporation
    Inventors: Xiao-Dong Pan, Pat Sadhukhan
  • Patent number: 7959895
    Abstract: Process for the production of aluminum hydroxide flame-retardants by wet-miling and spray-drying an aluminum hydroxide containing slurry.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: June 14, 2011
    Assignee: Martinswerk GmbH
    Inventors: Rene Gabriel Erich Herbiet, Norbert Wilhelm Puetz, Volker Ernst Willi Keller, Winfried Toedt
  • Patent number: 7955589
    Abstract: An improved method and composition for producing aluminum hydroxide crystals in a Bayer process pregnant liquor, involve the addition of a crystallization modifier comprising a C8-C10 fatty acid, precursors, salts or blends thereof. The alkyl chain of the fatty acid crystallization modifier is free of functional groups. The modifier yields a commercially in the presence and absence of an hydrocarbon oil which dissolves the fatty acid.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: June 7, 2011
    Assignee: Nalco Company
    Inventors: John T. Malito, James A. Counter
  • Patent number: 7939050
    Abstract: A method for making a composite includes combining a strengthening agent and an aluminum compound to form a first solution; precipitating an Al(OH)3 gel from the first solution, wherein strengthening agent particles are dispersed within the gel; washing the Al(OH)3 gel with an alcohol; contacting the Al(OH)3 gel with a salt; drying the Al(OH)3 gel to form a powder; calcining the powder to convert Al(OH)3 to Al2O3; and sintering the powder to form a composite article comprising beta double prime alumina.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: May 10, 2011
    Assignee: General Electric Company
    Inventors: Atanu Saha, Adyam Srinivasa Mukunda
  • Publication number: 20110070141
    Abstract: A method of depositing a material on a substrate comprises placing a substrate into a process space in fluidic communication with a Gaede pump stage (GPS). A precursor gas is then injected into the process space while injecting a draw gas at a draw gas flow rate into the GPS such that the injected precursor gas achieves a precursor pressure and a precursor gas flow rate in the process space. Subsequently, substantially all of the precursor gas remaining in the process space is swept from the process space by injecting a sweep gas into the process space such that the injected sweep gas achieves a sweep pressure and sweep gas flow rate in the process space. The precursor pressure is higher than the sweep pressure, and the precursor gas flow rate is lower than the sweep gas flow rate.
    Type: Application
    Filed: May 6, 2009
    Publication date: March 24, 2011
    Applicant: Sundew Technologies LLC
    Inventor: Ofer Sneh
  • Patent number: 7906097
    Abstract: There is provided a process for preparing aluminium chloride comprising leaching aluminium dross residues with H2SO4 so as to obtain a leachate; and hydrochlorinating the leachate so as to obtain aluminium chloride. If desired, aluminium chloride can then be converted into alumina.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: March 15, 2011
    Assignee: Groupe Conseil Procd Inc.
    Inventors: Martin Beaulieu, Stéphane Chabot, Yves Charest, Jean-François Savard
  • Patent number: 7892447
    Abstract: Nanoplatelet forms of metal hydroxide and metal oxide are provided, as well as methods for preparing same. The nanoplatelets are suitable for use as fire retardants and as agents for chemical or biological decontamination.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: February 22, 2011
    Assignee: Aqua Resources Corporation
    Inventor: Orville Lee Maddan
  • Publication number: 20100272632
    Abstract: A process for neutralization is provided which can maintain a high solid content of a bauxite dissolution residual substance slurry even after a neutralization treatment is completed and the stabilize pH within a short time of the neutralization treatment. Such a process for neutralizing a bauxite dissolution residual substance containing a desiliconizing product which is generated in the production process of aluminum hydroxide using Bayer process, includes: mixing a bauxite dissolution residual substance or a bauxite dissolution residual substance slurry with sulfuric acid in an amount ranging from 0.6 to 1.2 equivalence to the total amount of sodium contained in the bauxite dissolution residual substance or a bauxite dissolution residual substance slurry, such that the solid content after mixing becomes 400 to 700 g/1 to gelate the mixture, and thereafter obtaining a bauxite dissolution residual substance neutralized slurry.
    Type: Application
    Filed: December 22, 2008
    Publication date: October 28, 2010
    Applicant: Showa Denko K.K.
    Inventor: Isao Ishikawa
  • Patent number: 7811546
    Abstract: Aluminum hydroxide aggregated particles which have an average particle diameter of not less than 40 ?m, an average particle diameter as determined after pressing at 1,000 kg/cm2 of not more than 35 ?m, and an L value of slurry obtained by mixing 20 ml of glycerol and 10 g of the aluminum hydroxide aggregated particles of not more than 69, are obtained by a process comprising the steps of: (a) feeding a supersaturated aqueous sodium aluminate solution to a vessel, (b) adding aluminum hydroxide seeds to the supersaturated aqueous sodium aluminate solution, (c) stirring the seed-added solution in the vessel while continuously feeding an additional supersaturated aqueous sodium aluminate solution into the vessel to hydrolyze the supersaturated aqueous sodium aluminate solution, (d) separating the aluminum hydroxide aggregated particles from the aqueous sodium aluminate solution, and (e) continuously discharging the aqueous sodium aluminate solution out of the vessel.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: October 12, 2010
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hisakatsu Kato, Masashi Wada, Naoyuki Eguchi, Hirofumi Sasaki
  • Patent number: 7807119
    Abstract: A process for the production of alumina trihydrate by alkaline digestion of bauxite using the Bayer process in which aluminate liquor and insoluble residues are separated using a solid/liquid separation device (E; W2; DC) characterised in that the said slurry (21a; 41; 230?) is at least partially passed through a hydrocyclone (H1; H21; H22; H3) to improve and accelerate the separation of the sodium aluminate liquor from the insoluble residues in the slurry (21a; 41; 230?) containing the said liquor and the said residues and that supplies or is derived from the said liquid-solid separation device. In a first embodiment, at least one hydrocyclone is used at the upstream side of the settler-thickener, as clarifier of the pregnant liquor. In a second embodiment, at least one hydrocyclone is used as a thickener of insoluble residue mud. In a third embodiment, a hydrocyclone is used in combination with the causticisation settler.
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: October 5, 2010
    Assignee: Aluminium Pechiney
    Inventors: Jean-Marc Rousseaux, Gerard Pignol, Yves Magnan
  • Patent number: 7790139
    Abstract: The object of the invention is a method for the manufacture of aluminum trihydrates by hydrolysis of aluminum alcoholates in aqueous, alkaline solution with addition of organic compounds, the so manufactured aluminum trihydrates and their use as catalyst supports.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: September 7, 2010
    Assignee: Sasol Germany GmbH
    Inventors: Kai Dolling, Andrea Brasch
  • Patent number: 7771681
    Abstract: The present invention relates ways to increase the output of a high quality product from the aluminum hydroxide recovery processes such as the Bayer process. The invention is a method of increasing the size of precipitated aluminum hydroxide while not reducing the total production amounts. The invention relates to the use of a crystal growth modifier compositions added to the precipitation liquor to increase the particle size distribution of the precipitated alumina trihydrate.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: August 10, 2010
    Assignee: Nalco Company
    Inventors: Dmitri L. Kouznetsov, Jianjun Liu, David H. Slinkman
  • Patent number: 7767190
    Abstract: An improved process for the causticisation of Bayer liquors in an alumina refinery, the process including the steps of reacting lime with aluminate ions in a Bayer liquor within a primary reactor under controlled conditions of low to moderate temperature (between 70-80° C.) and agitation, to form substantially only a hydrocalumite species and hydroxyl ions; and a secondary reactor wherein the hydrocalumite species formed is subjected to heating in contact with a Bayer liquor under controlled conditions so as to cause the hydrocalumite species to react with the liquor to form calcium carbonate, aluminate ions and hydroxyl ions, whereby a causticised Bayer liquor is obtained and wherein the efficiency of lime utilization is substantially increased and/or alumina losses are minimized.
    Type: Grant
    Filed: October 28, 2002
    Date of Patent: August 3, 2010
    Assignee: BHP Billiton Worsley Alumina PTY Ltd.
    Inventors: Steven Philip Rosenberg, Darrel James Wilson, Catherine Ann Heath
  • Publication number: 20100061924
    Abstract: Process for the production of aluminum hydroxide flame-retardants by wet-miling and spray-drying an aluminium hydroxide containing slurry.
    Type: Application
    Filed: June 21, 2007
    Publication date: March 11, 2010
    Applicant: Martinswerk GmbH
    Inventors: Rene Gabriel Erich Herbiet, Norbert Wilhelm Puetz, Volker Ernst Willi Keller, Winfried Toedt
  • Patent number: RE43468
    Abstract: An alumina particle (1) of the present invention has an alumina body with a short axis length (b) of 1 to 10 nm, a long axis length (a) of 20 to 400 nm and an aspect ratio (a/b) of 5 to 80. The alumina body is expressed by a Formula I, and n is not less than 0. Al2O3.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: June 12, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takashi Oda, Yasuaki Kai, Tomohiro Ito