Special Process Of Pelletizing Or Agglomerating Or Product Patents (Class 106/485)
  • Patent number: 10106427
    Abstract: A method for preparing nano silica and nano calcium carbonate using rice hull ash and flue gas. The method includes: 1) adding rice hull ash to a sodium hydroxide solution, to yield a first mixed solution; stirring and heating the first mixed solution; then filtering the first mixed solution to yield a first filtrate; 2) adding the first filtrate to a reaction still, and diluting the first filtrate; adding polyethylene glycol as a dispersant to the reaction solution; introducing flue gas to the reaction solution; filtering the reaction mixture to yield a first filter cake and a second filtrate; washing the first filter cake to a neural pH, slurrying and drying the first filter cake to yield nano silica; and 3) mixing the second filtrate and a washing solution collected from 2); adding a calcium hydroxide solution to the reaction still, to yield nano calcium carbonate.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: October 23, 2018
    Inventors: Yilong Chen, Yanfeng Zhang, Zhijiu Zhuo, Xingcai Zheng, Zhangjian Fang, Leiming Tao, Yuting Cheng
  • Patent number: 8083848
    Abstract: Disclosed herein are kaolin compositions, such as beneficiated fine sedimentary kaolin compositions. The beneficiated fine sedimentary kaolins may be obtained from the upper bed of the Rio Capim Kaolin deposit. The compositions may have at least one property chosen from a low iron content and low Hinckley crystallinity index, such as Fe2O3 in an amount less than about 0.8% by weight relative to the total weight of the solids content and wherein the Hinckley crystallinity index of the kaolin is less than about 0.5. Also disclosed are products obtained therefrom, such as paint and paper coating compositions.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: December 27, 2011
    Assignee: Imerys Pigments, Inc.
    Inventors: Robert J. Pruett, Paula R. Alves
  • Patent number: 7954341
    Abstract: The invention is concerned with a material which shows low absorption for UV radiation having a wavelength below 250 nm, low birefringence, high chemical resistance and high radiation resistance and which is therefore particularly usable for making optical components for microlithography. According to the invention the material consists of synthetically produced quartz crystallites which form a polycrystalline structure and have a mean grain size in the range between 500 nm and 30 ?m. The method according to the invention for making a blank from the material comprises providing granules consisting of synthetically produced quartz crystals having a mean grain size in the range between 500 nm and 30 ?m, and sintering the granules to obtain a blank of polycrystalline quartz.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: June 7, 2011
    Assignee: Heraeus Quarzglas GmbH & Co. KG
    Inventors: Bodo Kuehn, Stefan Ochs
  • Patent number: 7806978
    Abstract: The present invention relates to a kaolin composition having improved physical properties, for example, for use in the production of paper products. The composition can comprise kaolin having a shape factor of at least about 20. The kaolin can have a particle size distribution such that at least about 94% by weight of the kaolin can have an esd of less than about 2 ?m and/or at least about 80% by weight of the kaolin can have an esd of less than 1 ?m. The amount of the kaolin having an esd of less than about 0.25 ?m can range from about 25% to about 60% by weight. The Hercules viscosity of the kaolin product is less than 4000 rpm at 18 dynes at 63% solids and less than 1500 rpm at 18 dynes at 69% solids when measured using the “A” bob. The present invention also relates to an improved method for making the kaolin product from sedimentary kaolin.
    Type: Grant
    Filed: December 15, 2003
    Date of Patent: October 5, 2010
    Assignee: Imerys Pigments, Inc.
    Inventors: Robert J. Pruett, Jun Yuan, Bomi M. Bilimoria, Roger W. Wygant, Anthony V. Lyons
  • Patent number: 7731790
    Abstract: The invention concerns a conditioned composition comprising at least a liquid absorbed on a support containing a precipitated silica, said silica being in the form of substantially spherical beads and having: a mean pellet size greater than 150 ?m; a filling density in compact state(DRT) greater than 0.29; an oversize rate for a grid with mesh aperture size of 75 ?m of at least 92% by weight. The invention also concerns the use of such a silica as a support for liquid.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: June 8, 2010
    Assignee: Rhodia Chimie
    Inventor: Jean-François Viot
  • Patent number: 7611575
    Abstract: The present invention relates to coarse calcined kaolin slurries having a high solids content. The invention also relates to methods of making such slurries. The resulting slurries can have a solids content of at least about 58% by weight wherein at least about 40% by weight of the calcined kaolin particles has a particle size of at least about 1 ?m. The slurries can be stabilized where the solids show little settling from suspension. The slurries have many uses, including fillers or extenders in paint and coating compositions for paper or paper board. More generally, the inventive products may be used wherever calcined kaolins are used. The present invention also related to coarse calcined kaolin slurries having a multimodal particle size distribution and a high solids content.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: November 3, 2009
    Assignee: Imerys Pigments, Inc.
    Inventors: Edward J. Sare, Tommy L. Adkins, Stephen C. Raper
  • Patent number: 7563317
    Abstract: Silanised, structurally modified silicas, characterised by groups fixed on the surface, the groups being alkylsilyl (SiCnH2n+1, with n=2-18). They are produced in that pyrogenically produced silicas are treated with the silanising agent and structurally modified. They are used to improve scratch resistance in lacquers.
    Type: Grant
    Filed: July 29, 2003
    Date of Patent: July 21, 2009
    Assignee: Degussa AG
    Inventors: Jürgen Meyer, Stephanie Frahn, Manfred Ettlinger
  • Publication number: 20080190037
    Abstract: Metal oxide particle agglomerates prepared by adding an aluminum phosphate agglomerating agent with mixing to an aqueous dispersion of metal oxide nanoparticles to form an aqueous homogeneous dispersion of nanoparticles and agglomerating agent and then adjusting the pH of the dispersion with mixing to about 3.5 to about 6.5 to produce the particle agglomerates and use of the particle agglomerates to prepare ink receptive coatings, as catalysts, as reinforcing fillers, as polishing abrasives and as flattening agents.
    Type: Application
    Filed: April 18, 2008
    Publication date: August 14, 2008
    Inventors: David P. Workman, Michael A. Romba, Ronald S. Doles
  • Patent number: 7279037
    Abstract: Disclosed are methods of processing Chinese kaolin involving providing Chinese kaolin having a desired powder size, delaminating the Chinese kaolin, pulverizing the delaminated Chinese kaolin at least two times, and heating the at least twice pulverized Chinese kaolin. Also disclosed are systems for automated processing of Chinese kaolin containing a pulverizer for pulverizing Chinese kaolin, a tester for testing and generating data of at least one parameter of the Chinese kaolin or at least one parameter of the pulverizer, a controller, operatively coupled to the pulverizer and the tester, for controlling operation of the pulverizer based on data received from the tester.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: October 9, 2007
    Assignee: Engelhard Corporation
    Inventors: Saad N. Nemeh, Danny Williams, Francis Yin, Randall P. Brown, Ernie Finch
  • Patent number: 7270704
    Abstract: The inventive method for producing refractory high-strength spherical granules consists in separately presintering kaolin and bauxite in a rotational furnace, jointly sintering said components in order to produce a charging material, granulating, drying and screening said charging material, sintering said granules in the rotational furnace and screening the sintered granules. Said sintered kaoline is produced by sintering at a temperature ranging from 1400 to 1500 DEG C so far as a water absorption of 5% is attained for kaoline containing 40-45 mass % and a free quartz in a quantity equal to or greater than 60 mass %. The Al2O3:SiO2 ratio in the charging material is equal to 1:1 at the following charging material component ratio: 36-67 mass % sintered kaolin and the rest being sintered bauxite.
    Type: Grant
    Filed: November 8, 2005
    Date of Patent: September 18, 2007
    Assignee: Otkrytoe Aktsionernoe Obschestvo “Borovichsky Kombinat Ogneuporov”
    Inventors: Vladimir Anatolievich Mozhzherin, Viktor Pavlovich Migal, Vyacheslav Yakovlevich Sakulin, Alexandr Nikolaevich Novikov, Galina Nikolaevna Salagina, Evgeny Arkadievich Schtern, Vladimir Vasilievich Skurikhin, Vyacheslav Vladimirovich Bulin, Lyubov Vladimirovna Mordanova, Boris Abramovich Simanovsky, Oleg Mikhailovich Rosanov
  • Patent number: 7125432
    Abstract: New methods of producing narrower particle size distribution precipitated silica and/or silicate materials are provided. Such a method permits a significant reduction in manufacturing costs through the utilization of more efficient drying/evaporation components, in essence, in one potentially preferred embodiment, production of such silica and/or silicate materials followed directly by a hydraulic chamber press filtering step combined with vacuum dewatering subsequently leading to the needed resultant particle comminution. The resultant precipitated silicas and/or silicates produced thereby exhibit greater density prior to comminution and thus greater propensity for more uniform milling than previously utilized and prevalent spray/flash drying apparatuses.
    Type: Grant
    Filed: July 23, 2004
    Date of Patent: October 24, 2006
    Assignee: J.M. Huber Corporation
    Inventor: Yung-Hui Huang
  • Patent number: 6884509
    Abstract: An aggregate turf filler for use with the turf of athletic fields and landscaped areas which comprise crushed silica sand particles (SiO2) which are substantially round in shape and are sized to be between 12 and 40 mesh. An acrylic based sealer covering the outer surface of each of the silica sand particles. Finally, providing that the silica sand particles have a smooth outer surface, possess an angle of repose of less than 30°, repel water, resist compacting, present no damaging sharp edges when incorporated with the turf and are environmentally safe.
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: April 26, 2005
    Assignee: U.S. Greentech, LLC
    Inventors: Carl L. Huff, Randolph S. Reddick
  • Patent number: 6866711
    Abstract: A composite pigment is provided with the composite pigment including a dense inorganic material and silica. The pigment composition is characterized by a CTAB surface area of greater than about 20 m2/g; a BET surface area of greater than about 15 m2/g; and a density of greater than about 2.5 g/cm3.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: March 15, 2005
    Inventors: Fitzgerald Alphanso Sinclair, Mark Edward Wozniak, Louis Frank Gatti, William C. Fultz
  • Patent number: 6849112
    Abstract: Amorphous inorganic particles as a dental material includes silica and inorganic oxide(s) other than silica and has high x-ray impermeability. The inorganic particles as a dental material includes silica with the content in the range from 70 to 98 weight % and oxide(s) of one or more elements selected from the group of Zr, Ti, La, Ba, Sr, Hf, Y, Zn, AL, and B, wherein 5 to 70 weight % of the silica is originated from an acidic silicic acid solution and 30 to 95 weight % of the silica is originated from a sol of silica. The inorganic particles as a dental material have an average particle diameter in the range from 1 to 10 ?m, specific surface area in the range from 50 to 350 m2/g, pore volume in the range from 0.05 to 0.5 ml/g, amorphous crystallinity as observed by x-ray diffraction, and the refractive index in the range from 1.47 to 1.60.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: February 1, 2005
    Assignee: Catalysts & Chemicals Industries Co., Ltd.
    Inventors: Hiroyasu Nishida, Noboru Senju, Michio Komatsu
  • Patent number: 6761763
    Abstract: Calcined kaolin clay having a high bulk density, improved wet out and slurry incorporation times is produced by using pressure to compact the clay. Other properties of the compacted clay are improved or equivalent to the non-compacted starting calcined clay material.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: July 13, 2004
    Assignee: Thiele Kaolin Company
    Inventors: William H. Wiggins, Sr., Andrea L. Crabb, William H. Wiggins, Jr.
  • Publication number: 20040000257
    Abstract: Calcined kaolin clay having a high bulk density, improved wet out and slurry incorporation times is produced by using pressure to compact the clay. Other properties of the compacted clay are improved or equivalent to the non-compacted starting calcined clay material.
    Type: Application
    Filed: June 26, 2002
    Publication date: January 1, 2004
    Inventors: William H. Wiggins, Andrea L. Crabb, William H. Wiggins
  • Patent number: 6613138
    Abstract: A manufactured granular substrate composition suitable for use as a carrier for active chemical agents. The composition includes one or more mineral components having a bulk density greater than about 70 pounds per cubic foot. The composition also contains about one or more light weight additives and one or more water soluble binders. The resulting manufactured granular substrate has a bulk density of less than about 55 pounds per cubic foot with a size guide number of about 75 to about 300.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: September 2, 2003
    Assignees: The National Lime and Stone Co., The Andersons Agriservices, Inc.
    Inventors: James W. Welshimer, Nadine C. Dunn, Timothy D. Birthisel
  • Patent number: 6610136
    Abstract: Aggregated mineral pigments (such as kaolin clay pigments) having a high surface area and useful in coating and filling compositions for ink jet printing media are manufactured by dry grinding an unground mineral composition starting material and then optionally acid treating the ground material.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: August 26, 2003
    Assignee: Thiele Kaolin Company
    Inventors: Prakash B. Malla, Siva Devisetti
  • Patent number: 6537363
    Abstract: A pigment product suitable for use in a coating composition to provide a gloss coating on paper, the pigment product comprising a processed particulate kaolin produced from a naturally platy kaolin clay having a particle size distribution such that about 50% to 60% by weight of the particles have an esd less than 2 &mgr;m and less than 25% by weight of the particles have an esd less than 0.25 &mgr;m and a shape factor of at least 15. This platy clay can be blended with b-fraction clay component. In processing, the crude kaolin is ground to a shape factor greater than 50 to produce even greater “platy” clay. The pigment product has a particle size distribution such that at least 80% by weight of the particles have an esd less than 2 &mgr;m and greater than 12% and less than 35% by weight of the particles have an esd less than 0.25 &mgr;m and whose surface area is greater than 12 m2/g when measured by the BET method.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: March 25, 2003
    Assignee: Imerys Pigments, Inc.
    Inventors: Christopher R. L. Golley, Daniel John Panfil, Harry Vincent Brown, Jr., John Claude Husband
  • Publication number: 20030019399
    Abstract: Aggregated mineral pigments (such as kaolin clay pigments) having a high surface area and useful in coating and filling compositions for ink jet printing media are manufactured by dry grinding an unground mineral composition starting material and then optionally acid treating the ground material.
    Type: Application
    Filed: March 21, 2002
    Publication date: January 30, 2003
    Inventors: Prakash B. Malla, Siva Devisetti
  • Publication number: 20030003294
    Abstract: Systems and methods of making and using fine particle materials in pigment blends and for using the aforementioned pigment blends in paint, coating, or coloring compositions are provided. This invention further provides systems and methods of enhancing the visual appearance of a variety of substrates by introducing a paint, coating, or coloring composition to the substrate. The fine particle materials of the present invention have a substantially random geometric shape, a particle size less than about 100 microns, and help provide both functional and visual enhancing properties to compositions and substrates containing these fine particle materials.
    Type: Application
    Filed: July 16, 2002
    Publication date: January 2, 2003
    Applicant: Ameritech Holding Corporation, a corporation of New York
    Inventors: Guido Greco, Vincent Pernice, Barry E. Scheetz
  • Patent number: 6494943
    Abstract: Colored pigments having one or more desired parameters and/or properties are described. These parameters and/or properties include: a) a particles size of from about 10 nm to about 300 nm; b) an accusizer number of less than 1010 particles/ml of dispersion at 15% solids which are greater than 0.5 micron; c) a filterability such that when in a liquid medium, 100 ml having 10% solids of the colored pigment filters through a 3 micron nylon absolute filter; d) a colored pigment purity of greater than about 80%, based on extractable material; and/or e) a stability such that the above-described properties do not change by more than 50% at 25 degrees C. for at least one week. Colored pigments having at least one organic group and having one or more of the above-described characteristics is also described as well as a process for preparing surface-modified colored pigments.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: December 17, 2002
    Assignee: Cabot Corporation
    Inventors: Yuan Yu, Friedrich K. von Gottberg, Robert M. Amici, Paul S. Palumbo
  • Patent number: 6478865
    Abstract: Aggregated mineral pigments (such as kaolin clay pigments) having a high surface area and useful in coating compositions for ink jet printing media are manufactured by dry grinding an unground mineral composition starting material and then optionally acid treating the ground material.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: November 12, 2002
    Assignee: Thiele Kaolin Company
    Inventors: Prakash B. Malla, Siva Devisetti
  • Patent number: 6294505
    Abstract: The present invention relates to an integrated additive composition which contains anti-blocking agents and at least one organic component and is characterized in that the organic component(s) is (are) localized in a concentration of 5 to 65 wt.-%, relative to the total weight of the composition, in the pores of the anti-blocking agent, the volume of the organic component(s) not being greater, however, than the pore volume of the anti-blocking agent. The invention also describes processes for the preparation of this integrated additive composition and its use in polyolefin films and in injection molding.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: September 25, 2001
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Georg Luers, Andreas Schmidt
  • Patent number: 6270562
    Abstract: A filler material comprising a fibrous material and one or more forms of surface-modifying particles for use in dental composites and dental restorations. The surface-modifying particles are bonded to the fibrous material to increase the surface area of the fibrous material and improve the bonding properties of the fibrous material to enable it to better bond to a resin matrix material in a dental composite. In accordance with the present invention, the fibrous material possesses a lower melting temperature than the surface-modifying particles. The surface-modifying particles and the fibrous material are heated to a temperature below the softening temperature of the fibrous material but at a temperature and time sufficient to soften the surface of the fibrous material in order to bond the surface-modifying particles thereto.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: August 7, 2001
    Assignee: Jeneric/Pentron, Inc.
    Inventor: Weitao Jia
  • Patent number: 6136086
    Abstract: Flux calcined kaolin clay especially useful as a pigment for low sheen paints is obtained by mixing hydrous kaolin with an aqueous solution of alkaline flux, spray drying, pulverizing, calcining and repulverizing.
    Type: Grant
    Filed: November 19, 1998
    Date of Patent: October 24, 2000
    Assignee: Englehard Corporation
    Inventors: John Hen, Ray Young, Andres Ginez, Sharad Mathur
  • Patent number: 6103005
    Abstract: The present invention provides compositions, and method for making same, comprising large particle size, calcined kaolin clays that, when used in paint formulations, provide paints having low sheen and good weathering resistance. Compositions of the invention include a composition comprising the pigment produced by a process comprising calcining a feed comprising kaolin having a median equivalent spherical diameter (e.s.d.) as measured on a Sedigraph 5100 of greater than about 2.0 microns and having .ltoreq. about 15% less than 0.5 micron.
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: August 15, 2000
    Assignee: Imerys Kaolin, Inc.
    Inventors: Edward J. Sare, Stephen C. Raper, Tommy L. Adkins, Curtis L. Manning
  • Patent number: 6103004
    Abstract: The invention relates to an aggregated silica gel which has been produced from silica gel particles having a particle size of 1 to 20.mu., a surface of 200 to 1000 m.sup.2 /g and a specific pore volume of 0.4 to 2.5 ml/g and a binding agent selected from synthetic or natural phyllosilicate, pyrogenic silicon dioxide and organic polymers soluble in water or dispersible in water. Aggregation takes place by spray-drying a suspension having 1 to 25% solids. The product is suitable as a matting agent for coatings, as an antiblocking agent for polymer films and as a beer clarifying agent.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: August 15, 2000
    Assignee: Grace GmbH
    Inventors: Peter Belligoi, Rex Field, Georg Luers, Rita Schneider
  • Patent number: 6017387
    Abstract: A process for preparing a molding sand for a green sand mold is provided. The process comprises the step of drying under a reduced pressure of 0 to 0.3 atm for 0.5 to 30 seconds a green molding sand obtained by kneading silica sand, clay, and water, to dry the clay superficial part and to retain in a moist state the clay deeper part on the silica sand core part in each particle of the molding sand. The molding sand prepared by this process has enhanced flowability. Furthermore, the sand mold prepared from the molding sand has sufficient strength.
    Type: Grant
    Filed: October 8, 1998
    Date of Patent: January 25, 2000
    Assignee: Sintokogio, Ltd.
    Inventors: Yutaka Hadano, Shigeaki Yamamoto
  • Patent number: 5776240
    Abstract: Granules based on silicon dioxide and having the properties:Average particle size: 10 to 120 .mu.mBET surface area: 40 to 400 m.sup.2 /gPore volume: 0.5 to 2.5 ml/gPore size distribution: less than 5% of the total pore volume exists of pores with a diameter<5 nm, remainder are meso- and macroporespH value: 3.6 to 8.5Tapped density: 220 to 700 g/lThey are prepared by dispersing silicon dioxide in water, spray drying, and optionally heating and/or silanizing. The granules can be used as catalyst supports.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: July 7, 1998
    Assignee: Degussa Aktiengesellschaft
    Inventors: Klaus Deller, Helmfried Krause, Juergen Meyer, Dieter Kerner, Hans Lansink-Rotgerink, Werner Hartmann
  • Patent number: 5707440
    Abstract: A finely divided inorganic filler material is a sintered composite which consists of larger macro-filler particles of glass and of smaller micro-filler particles of glass or ceramics partially covering the macro-filler particle and firmly connected to it by sintering. Plastic materials reinforced with the filler are distinguished by improved abrasion resistance.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: January 13, 1998
    Assignee: Heraeus Kulzer GmbH
    Inventors: Xu Hengchang, Joachim Nagel
  • Patent number: 5690728
    Abstract: A structured composite pigment composed of TiO.sub.2, calcined clay and polyaluminum chloride (PAC). A novel process is disclosed for producing an aggregated composite premium pigment having superior optical, physical and dispersion characteristics for papermaking applications. The aggregated pigment is produced by chemically aggregating a mixture containing TiO.sub.2 and calcined clay with polyaluminum chloride of a basicity of 10-85% in alkaline conditions of pH 8.5-10.5.
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: November 25, 1997
    Assignee: Nord Kaolin Company
    Inventor: Sathanjheri A. Ravishankar
  • Patent number: 5674315
    Abstract: A fluidized bed reactor is supplied with fuel, oxygen-containing gas, and kaolinite, which contains water of crystallization. At least 80% by weight of the kaolinite have particle sizes in the range from 0.1 to 3 mm. A fluidized bed at temperatures in the range from 850.degree. to 950.degree. C. is formed in the fluidized bed reactor. A meta-kaolin white pigment which contains water of crystallization not in excess of 2% by weight is withdrawn from the fluidized bed reactor.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: October 7, 1997
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Ernst Bareuther, Jochen Kauper, Werner Stockhausen, Martin Rahn
  • Patent number: 5584925
    Abstract: An opacifying kaolin pigment with improved porosity, light scattering ability (opacity), gloss, and ink receptivity over that of the starting pigment is manufactured by a process which comprises the steps of treating an aqueous solution of kaolin with a phosphate compound, using the endogenous aluminum leached from kaolin and/or adding a soluble aluminum compound and increasing the pH of the mixture.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: December 17, 1996
    Assignee: Thiele Kaolin Company
    Inventors: Chris B. Maxwell, Prakash B. Malla
  • Patent number: 5565578
    Abstract: A process for conditioning diaryldiketopyrrolo[3,4-c]pyrrole pigments (DPP) and for preparing solid solutions having a DPP component are disclosed. The inventive processes involve dissolving the DPP in aqueous, basic DMSO, alone, or in mixture with additional components in the case of a solid solution, and then precipitating the conditioned pigment or pigment solid solution by methods known in the art.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: October 15, 1996
    Assignee: Ciba-Geigy Corporation
    Inventor: Fridolin B abler
  • Patent number: 5551975
    Abstract: Pigments for use in paper are comprised of structured aggregate clays which are reaction products of kaolin clays and colloidal silicas. Silica modified clays of low treatment level can under certain high-shear mixing conditions be attritioned back to their starting clay particle size consequently yielding silica coated clay particles that provide unique properties. Also provided are structured aggregate clay products produced by the reaction of kaolin clay, colloidal silicas and spacer particles such as titanium dioxide, which products have improved porosity and light scattering characteristics. Also provided are clay slurry products which comprise mixtures of the reaction product of kaolin clay and colloidal silica, and optionally titanium dioxide, blended with other clay products.
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: September 3, 1996
    Assignee: J. M. Huber Corporation
    Inventors: Gary M. Freeman, Kurt H. Moller, Richard D. Carter
  • Patent number: 5496403
    Abstract: Inorganic oxide pigments (ceramics) are prepared by mixing the starting materials in the presence of water and in the presence or absence of assistants, drying and subsequent calcining in a rotary furnace by processing the starting materials in the presence of water into a pumpable suspension having particle sizes of 50%<10 .mu.m and 100%<50 .mu.m, dewatering the suspension by spray drying it to leave porous granules, and calcining those granules>97% from 20 to 800 .mu.m in size.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: March 5, 1996
    Assignee: BASF Lacke + Farben Aktiengesellschaft
    Inventors: Harald Gaedcke, Guenter Etzrodt, Egon Liedek
  • Patent number: 5480578
    Abstract: A detergent additive for commercial detergents (softener agents) that contain fabric softeners is described. This additive is based on agglomerates of a smectic laminar silicate coated with divided particles. This detergent additive is characterized in that the agglomerates are at least partially coated with particles of a cation exchanger that will pass through a screen with a mesh of about 45 .mu.m and have an average particle size of less than about 10 .mu.m, where the amount of cation exchanger particles is about 2 to 30 wt % (based on the dry weight of the uncoated agglomerates). This detergent additive may be used in the conventional detergent formulations.
    Type: Grant
    Filed: March 3, 1994
    Date of Patent: January 2, 1996
    Assignees: Sud-Chemie AG, Dalli-Werke
    Inventors: Rudiger Hirsch, Reinhard Hahn, Norbert Schall
  • Patent number: 5376171
    Abstract: A process for producing micropellets of lightweight aggregate having a substantially spheroidal configuration which includes continuously mixing ceramic clay and liquid in a high speed rotating pin mixer to encapsulate substantially all other non-volatile inorganic solid materials present in micropellets having a diameter not exceeding about six mesh. The spheroidal micropellets are then fired at a temperature of at least 2,000.degree. F. to oxidize all volatile organic compounds present. The light-weight aggregate of micropellets can advantageously-be used to replace sand in a cement or concrete matrix, as a well as for numerous other uses.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: December 27, 1994
    Inventor: James A. Frye
  • Patent number: 5364579
    Abstract: Calcined kaolin clay is pelletized in a pelletizer by a process wherein the calcined clay has ammonia added to it, suitably in relatively small amounts such as less than 1% by weight. The pelletized clay is preferably coated with a binder to improve its flowability.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: November 15, 1994
    Assignee: ECC International Inc.
    Inventors: Weyman H. Dunaway, Elizabeth H. Garrett, Dudley C. Rowe
  • Patent number: 5358560
    Abstract: Solid form additive systems which are dispersible in aqueous media are disclosed, as are methods for preparing such additive systems. The additive systems are dry, free-flowing particulate materials that contain at least one additive component, at least one tackifying agent, and at least one surfactant.
    Type: Grant
    Filed: October 4, 1991
    Date of Patent: October 25, 1994
    Assignee: Eastman Chemical Company
    Inventors: Brenda J. Hitch, Mahendra K. Sharma, Leo P. Voetgli
  • Patent number: 5269840
    Abstract: Colorant clusters comprising an aggregation of a plurality of grains of sol-derived material and colorant. The clusters are particularly useful as pigments in liquid compositions, e.g., paints and inks, for forming coatings that are retroreflective immediately upon drying. Also, a process for preparing such colorant clusters comprising admixing colorant in a binder sol to yield a pigment sol and then removing liquid medium from the pigment sol to yield the clusters. Also, a coating composition comprising retroreflective elements, a vehicle, and the aforementioned colorant clusters. After application of the composition to a substrate, the resultant coating is immediately retroreflective upon drying.
    Type: Grant
    Filed: February 4, 1992
    Date of Patent: December 14, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Geoffrey P. Morris, Chester A. Bacon, Jr., Wallace K. Bingham
  • Patent number: 5183540
    Abstract: Method for the recovery of solvent from a solvent-based wash liquid containing non-hazardous waste resulting from an equipment cleaning operation. The wash solution typically averaging approximately 90 percent solvent and 10 percent resin, pigments and other dissolved or suspended solids is continuously tumbled in a tumbler/evaporator vessel together with a highly porous, adsorbent extender in granulated form, while maintaining temperatures sufficient to evaporate the solvent and prevent the solid matter from sticking together after processing. The extender is a substantially inert, material and may be selected from diatomaceous earth, powdered calcium silicate, powdered glass (100 mesh), oak sawdust (100 mesh), cedar sawdust (100 mesh), bentonite, charcoal (100 mesh) and ground corn cobs. The amount of extender introduced into the vessel is of the order of 5 to 20 percent by weight of the wash solution. The system may employ jacketed ribbon, double cone or rotating helix blenders.
    Type: Grant
    Filed: September 18, 1990
    Date of Patent: February 2, 1993
    Inventor: Isadore E. Rubin
  • Patent number: 5028268
    Abstract: The rheology of an aqueous slurry of a calcined kaolin clay powder is significantly improved by spray drying a slurry of the calcined kaolin clay powder, recovering the spray-dried material, and forming an aqueous slurry from said spray-dried material.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: July 2, 1991
    Assignee: E.C.C. America Inc.
    Inventors: Dursun E. Ince, Paul R. Suitch, Hilary Burgamy, Tony May
  • Patent number: 5011534
    Abstract: A low-abrasion calcined kaolin opacifying pigment composed of particles in the size range of about 70 to 84% by weight finer than 2 microns and having a color defined by Hunter Trisitimulus values of "L" within the range of 92 to 94, "a" within the range of .sup.+ 1.0 to .sup.+ 2.2 and "b" within the range of .sup.+6.4 to .sup.+ 7.5. The pigment is produced by novel wet processing including high solids degritting of a high iron, high titania content Tertiary kaolin without conventional fractionation, bleaching and dewatering to isolate a fine particle size fraction, followed by spray drying, pulverization, calcination and repulverization.
    Type: Grant
    Filed: February 14, 1990
    Date of Patent: April 30, 1991
    Assignee: Engelhard Corporation
    Inventors: Richard R. Berube, John S. Babiec, Jr., M. Phillip Jameson, Andrew R. Negele, Mitchell J. Willis
  • Patent number: 4976786
    Abstract: A method for forming a hydrothermally aggregated kaolin clay pigment, comprising preparing an aqueous slurry of particulate kaolin clay and sodium aluminate, having a total solids concentration of from about 2 to 25% by weight, the weight ratio between kaolin and aluminate being greater than 1; and hydrothermally treating the slurry in a closed system to form aggregates of adherent kaolin platelets.
    Type: Grant
    Filed: October 4, 1989
    Date of Patent: December 11, 1990
    Assignee: ECC America Inc.
    Inventors: Weyman H. Dunaway, Lev F. Verbov
  • Patent number: 4851048
    Abstract: A structured kaolinitic pigment having improved physical and optical characteristics when incorporated as a filler in paper. The pigment is also useful in paper coating applications. The pigment consists of porous aggregates of kaolin particles which are chemically bonded together. The pigment may be produced by chemically reacting a particulate kaolin with a metal chloride, such as silicon tetrachloride. The process is conducted under conditions such that the kaolinite structure is not impaired.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: July 25, 1989
    Assignee: E.C.C. America Inc.
    Inventors: J. Philip E. Jones, Jorge E. Salinas, Keryn N. Geho, Weyman H. Dunaway, Rasik H. Raythatha
  • Patent number: 4842647
    Abstract: The present invention offers a mould additive for continuous casting of steel characterized by having a fully spherical shape in which average particle size is in the range of 100 to 800 .mu.m.
    Type: Grant
    Filed: February 10, 1988
    Date of Patent: June 27, 1989
    Assignee: Shinagawa Refractories Co., Ltd.
    Inventors: Kenji Ichikawa, Osamu Nomura, Yoichiro Kawabe, Koyo Yanagawa