Including Anticaking Or Antihygroscopic Function Patents (Class 423/267)
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Patent number: 11512238Abstract: A method of infusing salt can include heating salt to a temperature above the boiling point of water. The method can also apply a liquid additive solution to the heated salt to create an infused salt. The temperature of the heated salt can be sufficiently high that the salt remains above the boiling point of water for a first period of time after the liquid additive solution is applied thereto.Type: GrantFiled: January 30, 2019Date of Patent: November 29, 2022Inventor: Andrew Blank
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Patent number: 11495387Abstract: Magnetic particles, each including a core made of a magnetic material, and an insulating coating film which covers a surface of the core made of a magnetic material. The insulating coating film is formed of a sol-gel reaction product of a mixture containing a metal alkoxide and an organic phosphoric acid or a salt thereof.Type: GrantFiled: July 8, 2019Date of Patent: November 8, 2022Assignee: Murata Manufacturing Co, , Ltd.Inventors: Hironobu Kubota, Yuya Ishida
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Patent number: 10011485Abstract: The present invention relates to a method for the manufacture of cyclododecasulfur, a cyclic sulfur allotrope wherein the number of sulfur (S) atoms in the allotrope's homocyclic ring is 12. The method includes reacting a metallasulfur derivative with an oxidizing agent in a reaction zone to form a cyclododecasulfur-containing reaction mixture.Type: GrantFiled: February 23, 2017Date of Patent: July 3, 2018Assignee: EASTMAN CHEMICAL COMPANYInventors: Scott Donald Barnicki, Robert Thomas Hembre, Elaine Beatrice MacKenzie, Joy Lynn Laningham, Michael Richard Laningham, Shane Kipley Kirk, Larry Wayne Blair, Sumit Chakraborty, Venkateswarlu Bhamidi, Guoxiong Hua, John Derek Woollins
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Patent number: 10005670Abstract: An equilibrium solution, such as a beverage product, containing a calcium salt of a sequestrant (such as calcium hexametaphosphate), coordinated compound of a calcium sequestrant and a sequestrant allows the delivery of bio-available calcium while maintaining the preservative qualities of the sequestrant (such as sodium hexametaphosphate). In one embodiment, the reaction of a salt such as calcium hydroxide and a sequestrant such as sodium potassium hexametaphosphate (sodium potassium polyphosphate) yields such an equilibrium solution in a beverage matrix. Calcium hexametaphosphate having a relatively short phosphate chain is disclosed, as well as the method of making that material, and beverage compositions containing the material together with a sequestrant preservative, such as SHMP.Type: GrantFiled: March 10, 2016Date of Patent: June 26, 2018Assignee: Sunny Delight Beverages Co.Inventors: Robert J. Sarama, Gregory Arcuino
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Patent number: 9663635Abstract: The present invention provides, as an aluminum nitride powder excellent in the water resistance, an aluminum nitride powder subjected to a surface treatment with a predetermined organic compound. The present invention also provides a resin composition including the aluminum nitride powder and a resin, and a thermal conductive molded article obtained by molding the resin composition.Type: GrantFiled: December 16, 2014Date of Patent: May 30, 2017Assignees: NITTO DENKO CORPORATION, NITTO SHINKO CORPORATIONInventors: Yoshiharu Hatakeyama, Kenichi Fujikawa, Miho Yamaguchi, Yuji Yamagishi, Akihiro Oohashi
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Patent number: 9657442Abstract: The invention relates to an aqueous insolubilizer composition intended for the surface treatment of paper and cardboard, comprising a mixture composed of glyoxal and of at least one alkali metal orthophosphate, and also its use.Type: GrantFiled: March 26, 2013Date of Patent: May 23, 2017Assignee: ARCHROMA IP GMBHInventor: Claude Trouve
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Patent number: 9399577Abstract: Provided is a method for producing a water-resistant aluminum nitride powder capable of adding a good water-resistant property to an aluminum nitride powder wherein yttria exists on a particle surface. The method is for producing a water-resistant aluminum nitride powder by carrying out a treatment to a particle surface of an aluminum nitride powder, the method including the successive steps of (i) making an aluminum nitride powder contact with an acid solution wherein yttria exists at least on a particle surface of the aluminum nitride powder; and (ii) making the aluminum nitride powder contact with a phosphorous acid compound, wherein the amount of yttria which is extracted when the aluminum nitride powder is filtered, washed with water, and dried after the step (i) and is thereafter subjected to extraction with 1 mol/L hydrochloric acid is no more than 1000 mg per 100 g of the aluminum nitride powder.Type: GrantFiled: September 6, 2013Date of Patent: July 26, 2016Assignee: TOKUYAMA CORPORATIONInventors: Megumu Tamagaki, Yukihiro Kanechika
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Patent number: 9139758Abstract: Ice melting compositions, methods for manufacturing ice melting compositions, and methods for melting ice are disclosed. The ice melting compositions can include a coarse deicing particle nucleus and a fine deicing particle coating substantially surrounding the coarse deicing particle nucleus. The fine particle coating can be attached or bonded to the coarse particle nucleus with a binder. The coarse particle nucleus and the fine particle coating can have a variety of particle sizes.Type: GrantFiled: July 10, 2013Date of Patent: September 22, 2015Assignee: Moton Salt, Inc.Inventors: Stephen Matuszczak, Syed Ali Shah, Kurt John Waatti
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Patent number: 8247640Abstract: The present invention concerns highly swellable absorption mediums with a reduced caking tendency at high humidity and/or high temperatures, wherein a swellable polymer is coated with a non-ionic, nitrogen-containing surfactant and optionally a Lewis acid and then reacted by heating.Type: GrantFiled: March 5, 2010Date of Patent: August 21, 2012Assignee: Evonik Stockhausen GmbHInventors: Gerd Jonas, Richard Mertens, Markus Frank
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Patent number: 8236268Abstract: A process for producing sodium hydrogencarbonate crystal particles having a low caking property, which entails subjecting sodium hydrogencarbonate crystal particles having an average particle size of from 50 to 500 ?m based on the mass to heat treatment at a temperature of from 70 to 95° C. by a heating gas having a carbon dioxide gas concentration of at most the concentration calculated by the formula: Carbon dioxide gas concentration=0.071×e(0.1×T)×R(?0.0005×T?0.9574), where T (° C.) is the temperature of sodium hydrogencarbonate crystals, and R (%) is the relative humidity around the crystals at the temperature of the crystals, provided that the upper limit of the carbon dioxide gas concentration is 100 vol % to form anhydrous sodium carbonate on the surface of the sodium hydrogencarbonate crystal particles with a content of anhydrous sodium carbonate of from 0.03 to 0.4 mass % in the sodium hydrogencarbonate crystals.Type: GrantFiled: December 27, 2006Date of Patent: August 7, 2012Assignee: Asahi Glass Company, LimitedInventors: Hachirou Hirano, Takako Hirano, legal representative, Shintaro Kikuchi, Fumiaki Nakashima, Hisakazu Arima, Shigeru Sakurai
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Patent number: 7846409Abstract: The invention discloses deagglomerated barium sulphate which has an average primary particle size of less than 0.5 ?m and is coated with a dispersant. The dispersant has preferably reactive groups which are able to interact with the surface of the barium sulphate; particularly preferred dispersants are those which are able to endow the barium sulphate with a hydrophilic surface and have reactive groups for coupling to or into polymers. Also disclosed is a plastics premix comprising the deagglomerated, coated barium sulphate.Type: GrantFiled: December 1, 2004Date of Patent: December 7, 2010Assignee: Solvay Infra Bad Hoenningen GmbHInventors: Ferdinand Hardinghaus, Christopher David Glende, Karl Hoehler, Won Jai Park, Rainer Stahl, Andreas Poppe
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Patent number: 7470419Abstract: The present application relates to granules of powdery mineral particles produced by spray granulation of a liquid slurry comprising powdery minerals particles having particle size below 10 m, at least one water-reducing agent and/or at least one binder agent and/or at least one dispersing agent. The application further relates to a method for producing such granules.Type: GrantFiled: June 16, 2005Date of Patent: December 30, 2008Assignee: Elkem ASInventor: Tor Soyland Hansen
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Patent number: 7435758Abstract: Described is an additive for producing the positive active material for lead-acid storage batteries on the basis of finely divided tetrabasic lead sulfate. The additive contains a tetrabasic lead sulfate of an average particle size smaller than about 3 ?m as well as finely divided silicic acid for preventing an agglomeration of the particles of the tetrabasic lead sulfate. During maturation, this additive ensures the formation of the structure of a tetrabasic lead sulfate crystal with a very narrow bandwidth of crystal sizes and a very homogeneous distribution. In a subsequent electrochemical formation to lead oxide, this leads to particularly efficient lead-acid storage batteries. Furthermore, the invention relates to a method of making the additive according to the invention as well as its advantageous use in the positive material for the maturation and drying of singled and not singled plates in the production of lead-acid storage batteries.Type: GrantFiled: December 23, 2003Date of Patent: October 14, 2008Assignee: Penarroya Oxide GmbHInventors: Ian Klein, Werner Nitsche
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Patent number: 7091250Abstract: The present invention is an additive for producing a positive active material for lead-acid storage batteries on the basis of finely divided tetrabasic lead sulfate. The additive contains a tetrabasic lead sulfate of an average particle size less than about 3 ?m as well as finely divided hydrophobic silicic acid for preventing agglomeration of the particles of the tetrabasic lead sulfate. During maturation, this additive ensures the formation of the structure of a tetrabasic lead sulfate crystal with a very narrow bandwidth of crystal sizes and a very homogeneous distribution. In the subsequent electrochemical formation to lead oxide, this leads to particularly efficient lead-acid storage batteries. Furthermore, the invention relates to a method of making the additive according to the invention as well as its advantageous use in the positive material for the maturation and drying of plates in the production of lead-acid storage batteries.Type: GrantFiled: April 3, 2003Date of Patent: August 15, 2006Assignee: PENOX GmbHInventors: Ian Klein, Werner Nitsche
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Patent number: 7045112Abstract: Disclosed herein are compositions of a manganese sulfide (MnS) compound useful as additives for making a sintered product. Also disclosed herein is a method of making the composistions in which molybdenum (Mo) or Fe—Mo is added to the MnS compound to improve machinability and to obtain a more stable MnS compound, thereby reducing any change in weight and size in a sintering process. The compositions can suppress erosion of parts in a sintering furnace during a sintering process, prevent sooting on a surface of the sintered product from occurring, and enhance resistance to moisture in the air to keep the sintered product in the air for a long time.Type: GrantFiled: May 4, 2005Date of Patent: May 16, 2006Assignee: Kaya Ama Inc.Inventors: Dong Kyu Park, Hyung Bum Kim
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Patent number: 6949226Abstract: A sodium-based dechlorinating agent is added to a flue gas; hydrogen chloride contained in this flue gas is removed as residue of dechlorination; the thus removed residue of dechlorination is dissolved by adding water; water-insoluble constituents are separated from the resulting aqueous solution; and after adjusting pH of the aqueous solution remaining after separation of the water-insoluble constituents, mercury, dioxin, and the like are removed and discharged. The sodium-based dechlorinating agent is mixed with a hydrophilic anti-caking agent, with an angle of repose of 40° or more, a dispersibility of less than 50, and a floodability index value of less than 90. This permits inhibition of occurrence of a pressure drop and leakage in the filter cloth of the dust collector.Type: GrantFiled: June 25, 2001Date of Patent: September 27, 2005Assignees: Mitsui Engineering & Shipbuilding, Asahi Glass Company Ltd.Inventors: Tomio Sugimoto, Masumi Itaya, Yoshinao Hirano, Hiroaki Harada, Hachiro Hirano, Sigeru Sakurai, Makoto Yoshida, Masaharu Tanaka
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Publication number: 20040197254Abstract: A dispersed ingredient having metal-oxygen bonds which is obtained by hydrolyzing a metal alkoxide in an organic solvent in the absence of an acid, a base, and/or a dispersion stabilizer, either with 0.5 to less than 1 mol of water per mol of the metal alkoxide or at −20° C. or lower with 1.0 to less than 2.0 mol of water per mol of the metal alkoxide. In the organic solvent, the dispersed ingredient is stably dispersed without aggregating. Use of the dispersed ingredient enables a thin metal oxide film and a homogeneous organic/inorganic composite to be produced at a temperature as low as 200° C. or below.Type: ApplicationFiled: January 8, 2004Publication date: October 7, 2004Inventors: Motoyuki Toki, Akiji Higuchi, Nobuo Kimura, Yoshitaka Fujita
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Patent number: 6482379Abstract: A sodium-based dechlorinating agent g is added to a flue gas G6; hydrogen chloride contained in this flue gas is removed as residue of dechlorination; the thus removed residue of dechlorination is dissolved by adding water i; water-insoluble constituents k are separated from the resulting aqueous solution j; and after adjusting pH of the aqueous solution 1 remaining after separation of the water-insoluble constituents k, mercury, dioxin and the like are removed and discharged. The sodium-based dechlorinating agent g is mixed with a hydrophilic anti-caking agent, with an angle of repose of 40° or more, a dispersibility of less than 50, and a floodability index value of less than 90. A mean particle diameter of sodium hydrogencarbonate is set within a range of from 2 &mgr;m to 30 &mgr;m. The hydrophilic anti-caking agent comprises silica, and is contained in an amount of 0.1 mass % or more in the sodium-based dechlorinating agent.Type: GrantFiled: November 2, 2000Date of Patent: November 19, 2002Assignees: Mitsui Engineering & Shipbuilding Co., LTD, Asahi Glass Company Ltd.Inventors: Tomio Sugimoto, Masumi Itaya, Yoshinao Hirano, Hiroaki Harada, Hachiro Hirano, Sigeru Sakurai, Makoto Yoshida, Masaharu Tanaka
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Publication number: 20020054846Abstract: Solid pulverulent reactive composition for the purification of a gas, the said composition comprising sodium bicarbonate and a caking inhibitor for sodium bicarbonate comprising lignite coke and/or a magnesium compound comprising magnesium (hydr)oxide. Process for the purification of a gas, according to which a reactive composition comprising sodium bicarbonate which is substantially devoid of silica is introduced into the gas and the gas is subjected to removal of dust.Type: ApplicationFiled: November 15, 1999Publication date: May 9, 2002Inventors: NILO FAGIOLINI, GUY DEPELSENAIRE, PASCAL BERTEAU
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Publication number: 20020006372Abstract: A sodium-based dechlorinating agent g is added to a flue gas G6; hydrogen chloride contained in this flue gas is removed as residue of dechlorination; the thus removed residue of dechlorination is dissolved by adding water i; water-insoluble constituents k are separated from the resulting aqueous solution j; and after adjusting pH of the aqueous solution l remaining after separation of the water-insoluble constituents k, mercury, dioxin and the like are removed and discharged. The sodium-based dechlorinating agent g is mixed with a hydrophilic anti-caking agent, with an angle of repose of 40° or more, a dispersibility of less than 50, and a floodability index value of less than 90. A mean particle diameter of sodium hydrogencarbonate is set within a range of from 2 &mgr;m to 30 &mgr;m. The hydrophilic anti-caking agent comprises silica, and is contained in an amount of 0.1 mass % or more in the sodium-based dechlorinating agent.Type: ApplicationFiled: June 25, 2001Publication date: January 17, 2002Inventors: Tomio Sugimoto, Masumi Itaya, Yoshinao Hirano, Hiroaki Harada, Hachiro Hirano, Shigeru Sakurai, Makoto Yoshida, Masaharu Tanaka
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Patent number: 6065409Abstract: The method consists in causing the flue gases to pass through a filter placed inside the recovery boiler so that the fly ash contained in said flue gases can be hot filtered out. An additional flow (B) of a material is superposed on the flow of fly ash to be filtered, which material has characteristics such that it increases the melting point of the fly ash by forming high melting point eutectics so as to facilitate unclogging by preventing viscous bridges from forming between the particles of fly ash. Application to hot scrubbing of flue gases generated by burning household refuse.Type: GrantFiled: June 26, 1997Date of Patent: May 23, 2000Assignee: GEC Alsthom Stein IndustrieInventor: Jean-Xavier Morin
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Patent number: 5800805Abstract: This invention provides a deodorant composition in a dispensing container which is pressurized with an aerosol propellant. The primary ingredients of a typical product are particulate sodium bicarbonate, ethanol, volatile silicone oil and a suspending agent such as hydrophobic hectorite clay. An invention aerosol deodorant product has a stable particulate sodium bicarbonate suspension phase, and exhibits excellent fluid evacuation properties with a relatively high content of ethanol and low content of aerosol propellant.Type: GrantFiled: June 19, 1997Date of Patent: September 1, 1998Assignee: Church & Dwight Co., IncInventor: Lucia Salas
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Patent number: 5720794Abstract: An improved particulate, ammonium nitrate is prepared with 2.0-6.0 percent by weight potassium sulfate. The potassium sulfate suppresses crystalline phase IV.revreaction.III transitions in the ammonium nitrate particles while undergoing temperature variations between 18.degree.-42.degree. C. The resulting fertilizer, which may be further coated to further suppress dusting, exhibits superior resistance to caking, clumping and cracking.Type: GrantFiled: July 30, 1996Date of Patent: February 24, 1998Assignee: Mississippi Chemical CorporationInventor: Louis J. Tortorelli
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Patent number: 5650141Abstract: This invention provides a deodorant cosmetic stick product which has a translucent or transparent light transmitting appearance. The cosmetic stick has a content of ingredients such as sodium bicarbonate, propylene glycol, sodium stearate, Steareth-100, Pentadoxynol-200, and water. An invention deodorant cosmetic stick has excellent esthetics when applied underarm, such as smoothness and a comfortable dry feel, and without a visually perceptible residue.Type: GrantFiled: September 13, 1995Date of Patent: July 22, 1997Assignee: Church & Dwight Co., Inc.Inventors: Wolfgang R. Bergmann, Richard T. Murphy, Linda J. Lancaster
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Patent number: 5628990Abstract: This invention provides cosmetic deodorant stick, roll-on and cream formulations. An invention deodorant product comprises an organic matrix having a dispersed solids phase which includes discrete crystallites of bicarbonate salt ingredient and particulate boron oxide desiccant ingredient. When an invention deodorant product is applied to a skin surface, the boron oxide reacts with moisture, and converts to boric acid which neutralizes any content of a strong basic irritant such as alkali metal carbonate which is present as an impurity in an alkali metal bicarbonate salt.Type: GrantFiled: October 25, 1995Date of Patent: May 13, 1997Assignee: Church & Dwight Co., Inc.Inventors: Richard T. Murphy, Wolfgang R. Bergmann
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Patent number: 5578107Abstract: There is disclosed a caking inhibitor for mono-and diammonium phosphates which is water soluble and effective at small concentrations rendering the phosphates acceptable in most utilities without separation of the inhibitor. The inhibitor is sodium sulfate. Effective amounts of this salt range from about 0.5 percent to about 1 percent by weight in the ammonium phosphates. It is particularly advantageous that this salt is useful in both types of ammonium phosphates.Type: GrantFiled: June 6, 1995Date of Patent: November 26, 1996Assignee: Monsanto CompanyInventors: Robert V. Brill, Louis A. Highfill
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Patent number: 5472530Abstract: The present invention relates to a method of manufacturing free-flowing ammonium nitrate particles, applying an inorganic coating. The invention also comprises an anti-caking coating.Type: GrantFiled: February 24, 1995Date of Patent: December 5, 1995Assignee: Norsk Hydro a.sInventors: Torstein Obrestad, Leif G. Helleb.0., Jan B. Isaksen, Bj.0.rn Juliussen
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Patent number: 5468460Abstract: More reliable removal of sulfur oxides (SO.sub.x) from combustion effluents by in furnace injection is achieved by stabilizing slurries of calcium carbonate (limestone), calcium oxide (lime) and calcium hydroxide (hydrated lime) for extended periods of time and during in-furnace injection. The slurries are stabilized by a stabilization system comprising a generally hydrophobic surfactant having an HLB of less than about 8 and a more hydrophilic surfactant having an HLB of at least about 8, wherein the HLB values of the hydrophobic and the hydrophilic surfactants differ by at least about 3.Type: GrantFiled: January 10, 1994Date of Patent: November 21, 1995Assignee: Nalco Fuel TechInventor: M. Linda Lin
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Patent number: 5441669Abstract: Disclosed is a method of preventing potassium bicarbonate from caking. Anhydrous potassium carbonate is dispersed throughout the potassium bicarbonate immediately after it is manufactured. Preferably, about 0.1 to about 2.5 wt % of the anhydrous potassium carbonate is used. Also disclosed is a composition made by that method.Type: GrantFiled: July 5, 1994Date of Patent: August 15, 1995Inventors: Karl W. Seper, Robert L. Zeller, III, Russell J. Morgan
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Patent number: 5422087Abstract: This invention provides a free-flowing alkali metal bicarbonate composition, which has a content of an acidic inorganic compound such as boron oxide (B.sub.2 O.sub.3) or phosphorus pentoxide (P.sub.2 O.sub.5). The acidic inorganic compound reacts with the residual hygroscopic alkali metal carbonate content of the bulk alkali metal bicarbonate powder to form alkali metal bicarbonate.Type: GrantFiled: February 28, 1994Date of Patent: June 6, 1995Assignee: Church & Dwight Co., Inc.Inventor: M. Stephen Lajoie
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Patent number: 5372795Abstract: The invention relates to a process for continuously hydrophobicizing pyrogenic, finely divided silica, in which the waste gases are fed back to a mixing chamber upstream of the SiO.sub.2 reaction flame.Type: GrantFiled: November 8, 1993Date of Patent: December 13, 1994Assignee: Wacker-Chemie GmbHInventors: Ernst Muhlhofer, Gunter Kratel, Peter Scherm
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Patent number: 5183648Abstract: The invention concerns a process for preparing magnesia having reduced hydration tendency, wherein magnesia particles are treated with a solution of an inorganic acid, an organic acid an/or salts thereof, as well as hydration resistant magnesia thus obtained, a dry mixture for preparing magnesia based castables and magnesia based castables containing magnesia thus obtained.Type: GrantFiled: March 8, 1991Date of Patent: February 2, 1993Assignee: Shell Research LimitedInventor: Anthony J. Wolfert
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Patent number: 5182046Abstract: Improved sodium borohydride powder compositions have a silica-based anticaking agent. In a method wherein a mixture of sodium borohydride and an anti-caking agent are compacted under pressure, the process is improved, particularly in speed, by the use of a silica-based anti-caking agent.Type: GrantFiled: December 5, 1990Date of Patent: January 26, 1993Assignee: Morton International, Inc.Inventors: Richard A. Patton, Walter A. Richardson
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Patent number: 5154909Abstract: Process for the production of salt in which sodium chloride is crystallized in the form of spheres by evaporation of a sodium chloride brine and the spheres obtained are then broken up. The salt produced by the process is particularly suitable for the food industry.Type: GrantFiled: January 2, 1991Date of Patent: October 13, 1992Assignee: Solvay & Cie (Societe Anonyme)Inventors: Leon Ninane, Claude Breton
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Patent number: 4927463Abstract: The present invention provides an aqueous dispersion comprising gypsum and a surface-active, anionic compound, wherein the surface-active compound is a phosphoric acid ester selected from the group consisting of (1) an acidic phosphoric acid ester of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and are alkyl poly(oxyethylene), alkyl poly(oxypropylene), alkylphenoxy- alkyl or alkylphenyl polyoxyalkyl radicals, (2) a monophosphoric acid ester of a mono- or dihydroxyalkylurea or of an alkoxylated mono- or dihydroxyalkylurea, and (3) a monophosphoric acid ester of a polyalkoxylated amine, in which several hydroxyl groups can be esterified with phosphoric acid.Type: GrantFiled: March 30, 1989Date of Patent: May 22, 1990Assignee: Biochemie Ladenburg GmbHInventors: Erhard Kloetzer, Johannes Kioustelidis, Guenter Schmidt
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Patent number: 4923689Abstract: Disclosed herein is an aluminum nitride powder having the improved water-resistance, which is obtained by treating the aluminum nitride powder with an inorganic or organic phosphoric acid compound followed by heating at about 150.degree. to 800.degree. C. when the organic phosphoric acid compound is used.Type: GrantFiled: July 18, 1989Date of Patent: May 8, 1990Assignee: Toyo Aluminium Kabushiki KaishaInventors: Masatoshi Uenishi, Yoshiki Hashizume, Takamasa Yokote
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Patent number: 4894211Abstract: The invention relates to a process for the production of granular sodium perborate monohydrate having good mechanical strength. The process is characterized in that sodium silicate having an SiO.sub.2 /Na.sub.2 O molar ratio comprised within the range of from 0.4 to 2.0 is added to granular sodium perborate tetrahydrate while this is being kept in movement and the so processed perborate tetrahydrate is dried until perborate monohydrate is obtained.Type: GrantFiled: May 15, 1986Date of Patent: January 16, 1990Assignee: Ausimont S.p.A.Inventors: Antonino Condo', Renzo Ferrario
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Patent number: 4853144Abstract: A composition of matter in particulate, crystalline form. The composition comprises a hydrate-forming phosphate selected from the group consisting of sodium tripolyphosphate, sodium pyrophosphate and trisodium phosphate, between about 0.1% by weight and about 23% by weight added water in the form of water of hydration said water containing in solution sufficient surfactant to provide the composition from about 0.20 ppm and about 125 ppm of a surfactant. Methods for preparing such compositions are also disclosed.Type: GrantFiled: December 19, 1988Date of Patent: August 1, 1989Inventor: Louis A. Highfill
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Patent number: 4849198Abstract: Particulate, active-oxygen compounds, especially sodium percarbonate, tend to cake during storage, which makes it more difficult to handle them. The invention reduces this caking tendency while the active-oxygen content remains essentially unchanged. The method of achieving this comprises bringing the active-oxygen compound in contact with such an amount of an aqueous solution containing one or more phosphonic acid compounds capable of chelate complex formation that the weight ratio of active-oxygen compound to phosphonic acid compound is 100:0.1 to 100:10, preferably 100:1 to 100:3, and subsequent drying.Sodium percarbonate is used in particular as active-oxygen compound and 1-hydroxyethane-1,1-diphosphonic acid as a 3 to 30% by weight aqueous solution is used as phosphonic acid compound. Sodium percarbonate wet salt is preferably washed with this solution, freed of excess solution and dried. Percarbonate treated in this manner hardly tends to cake at all and exhibits a greater active-oxygen stability.Type: GrantFiled: June 7, 1988Date of Patent: July 18, 1989Assignee: Degussa AktiengesellschaftInventor: Alexander Ruhs
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Patent number: 4828823Abstract: The monofluorophosphate compatibility of dicalcium phosphate dihydrate can be improved in processes in which a slaked lime slurry is reacted with phosphoric acid to form a monocalcium phosphate solution to which is added magnesium oxide, additional lime slurry and pyrophosphoric acid with later removal of the dicalcium phosphate dihydrate. The improvement involved adding the magnesium oxide at 0.3%-2% and adding 0.1%--less than 0.5% of trimagnesium phosphate to the recovered dicalcium phosphate dihydrate.Type: GrantFiled: April 7, 1986Date of Patent: May 9, 1989Assignee: Stauffer Chemical CompanyInventor: Rosa Li
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Patent number: 4806332Abstract: A method for preventing anhydrous potassium fluoride from solidification by causing the anhydrous potassium fluoride to absorb carbon dioxide gas.Type: GrantFiled: December 28, 1987Date of Patent: February 21, 1989Assignee: Hashimoto Chemical Industries Co., Ltd.Inventor: Nobuhiro Miki
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Patent number: 4803058Abstract: A composition of matter in particulate, crystalline form. The composition comprises a hydrate-forming phosphate selected from the group consisting of sodium tripolyphosphate, sodium pyrophosphate and trisodium phosphate, between about 0.1% by weight and about 23% by weight added water in the form of water of hydration said water containing in solution sufficient surfactant to provide the composition from about 0.20 ppm and about 125 ppm of a surfactant. Methods for preparing such compositions are also disclosed.Type: GrantFiled: May 12, 1988Date of Patent: February 7, 1989Assignee: Monsanto CompanyInventor: Louis A. Highfill
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Patent number: 4797981Abstract: Process for the production of salt in which sodium chloride is crystallized in the form of spheres by evaporation of a sodium chloride brine and the spheres obtained are then broken up. The salt produced by the process is particularly suitable for the food industry.Type: GrantFiled: December 8, 1986Date of Patent: January 17, 1989Assignee: Solvay & Cie (Societe Anonyme)Inventors: Leon Ninane, Claude Breton
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Patent number: 4659557Abstract: In a process for making ferrous sulphate in granule form, ferrous sulphate heptahydrate is mixed with fine-grain brown coal or lignite having a low water content, in such an amount that the resulting mixture is pourable.Type: GrantFiled: March 7, 1983Date of Patent: April 21, 1987Assignee: Rheinische Braunkohlenwerke AG.Inventors: Uwe Lenz, Gunter Ritter
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Patent number: 4487749Abstract: Dicalcium phosphate dihydrate compositions having improved monofluorophosphate compatibility are prepared by reacting a lime slurry with phosphoric acid to form a monocalcium phosphate solution, and then further reacting the monocalcium phosphate solution with additional lime slurry to a pH in the range of from above about 2.2 to below about 5.5.Type: GrantFiled: July 8, 1983Date of Patent: December 11, 1984Assignee: Stauffer Chemical CompanyInventors: Fawzy G. Sherif, Helmut W. Majewski, Francis A. Via
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Patent number: 4486396Abstract: The present invention relates to ammonium nitrate or products having a high content of ammonium nitrate stabilized against swelling and break-down by thermal cycling, and a method for manufacturing such products. An amount of 0.05-1.0 weight % porous particles having a surface area of 150-400 m.sup.2 /g and a pore size of 100-300 .ANG.ngstroms are included in the products. As porous particles, preferably silicon dioxide particles having a surface area of 250-350 m.sup.2 /g and a pore size of 100-250 .ANG.ngstroms are used. The products are made by first drying granulated or prilled ammonium nitrate or products having a high content of ammonium nitrate and thereupon coating them with the porous particles, and if desired also adding a dust-binding agent and/or an anticaking agent. Ammonium nitrate thus conditioned is both as stable and porous as required for use in explosives and in addition it meets the requirements for so-called tropical grade ammonium nitrate.Type: GrantFiled: June 14, 1983Date of Patent: December 4, 1984Assignee: Norsk Hydro a.s.Inventors: Olav Kjohl, Ellen Brekke, Arne O. Egner
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Patent number: 4472365Abstract: Dicalcium phosphate dihydrate composition having improved monofluorophosphate compatibility are prepared by the addition of magnesium oxide and pyrophosphoric acid to the reaction mixture, and terminating the reaction by which the dicalcium phosphate dihydrate is formed at a low pH.Type: GrantFiled: June 15, 1981Date of Patent: September 18, 1984Assignee: Stauffer Chemical CompanyInventor: Christian G. Michel
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Patent number: 4447476Abstract: The present invention relates to a process for stabilizing dehydrated magnesium chloride by coating with a material having a high degree of affinity for water. The coating operation is preferably carried out with magnesium oxide in a layer thickness of at least 0.1 mm, the magnesium oxide being hydroxylated by adding water during the coating operation.Type: GrantFiled: May 3, 1982Date of Patent: May 8, 1984Assignee: F. J. Gattys IngenierburoInventor: Franz J. Gattys
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Patent number: 4421728Abstract: Particulate red amorphous phosphorus is stabilized against oxidative degradation to phosphorus acids and phosphine by the use of titanium dioxide or titanium phosphate.Type: GrantFiled: July 7, 1982Date of Patent: December 20, 1983Assignee: ERCO Industries LimitedInventor: Helena Twardowska
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Patent number: 4408998Abstract: A process for preparing thermally stable ammonium nitrate-containing granules having high bulk density, high impact resistance, high crushing resistance and little or no tendency to cake by spraying a composition containing at most 5% by weight water, about 0.5% to 5% by weight of a insoluble and chemically inert silica-containing material, ammonium nitrate, and other components into a fluidized bed of ammonium nitrate seed particles thereby forming granules and recovering the thus formed ammonium nitrate-containing granulated product.Type: GrantFiled: June 18, 1982Date of Patent: October 11, 1983Assignee: Unie Van Kunstmestfabrieken BVInventors: Stanislaus M. P. Mutsers, Cornelis Hoek, Gerardus M. C. Wagemans