Including Aluminum Patents (Class 423/465)
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Patent number: 9556037Abstract: Disclosed is a process for producing a fluorine-containing complex salt, characterized by that, on a reaction mother liquor containing a plurality of cation species and a fluoroanion in a state that they have been dissolved in a solvent, a trigger for accelerating decomposition of the fluoroanion is allowed to act, thereby precipitating a complex salt containing a plurality of cation species and fluorine, as a solid, from the reaction mother liquor. According to this process, it is possible to produce a monodispersed fluorine-containing complex salt with uniform particle size and shape.Type: GrantFiled: April 11, 2012Date of Patent: January 31, 2017Assignee: Central Glass Company, LimitedInventor: Tetsuya Tamura
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Patent number: 8936710Abstract: The disclosure provides low-molecular-ratio cryolite for aluminum electrolytic industry, which consists of potassium cryolite and sodium cryolite with a mole ratio of 1:1˜1:3, wherein the molecular formula of the potassium cryolite is mKF.AlF3 and the molecular formula of the sodium cryolite is nNaF.AlF3, where m=1˜1.5 and n=1˜1.5. When the low-molecular-ratio cryolite provided by the disclosure is applied to the aluminum electrolytic industry, electrolytic temperature and power consumption can be reduced and electrolytic efficiency is improved.Type: GrantFiled: January 22, 2014Date of Patent: January 20, 2015Assignee: Shenzhen Sunxing Light Alloys Materials Co., Ltd.Inventors: Xuemin Chen, Jun Yang, Zhihong Li, Weiping Wu
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Patent number: 8926861Abstract: The present invention relates to a hydrogen-storing composite material which is convertible essentially reversibly between a storing state and a non-storing state, wherein the reaction enthalpy in this conversion reaction can be set in a targeted manner to a value between 15 and 80 kJ/mol of H2, preferably 25 to 40 kJ/mol of H2.Type: GrantFiled: October 30, 2008Date of Patent: January 6, 2015Assignee: Helmholtz-Zentrum Geesthacht Zentrum für Material—und Küstenforschung GmbHInventors: Nico Eigen, Martin Dornheim, Rüdiger Bormann
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Patent number: 8808773Abstract: A process for treating a milled product to reduce microbial activity at a high confidence level is disclosed. A sterile ready to eat milled product at a high confidence of sterility is also disclosed.Type: GrantFiled: January 20, 2011Date of Patent: August 19, 2014Inventors: Glen Lester Weaver, Edith D. Akins-Lewenthal, Bradley T. Allen, Scott R. Baker, Dean Hoerning, Anthony E. Petersen, Richard William Schumacher, Benjamin Warren
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Patent number: 8679318Abstract: The disclosure provides an electrolyte supplement system in an aluminum electrolysis process, which includes low-molecular-ratio cryolite, wherein the low-molecular-ratio cryolite is selected from mKF.AlF3, nNaF.AlF3 or mixture thereof, where m=1˜1.5 and n=1˜1.5. When the electrolyte supplement system provided by the disclosure is applied to the aluminum electrolytic industry, electrolytic temperature can be reduced obviously in the aluminum electrolysis process without changing the existing electrolytic process; thus, power consumption is reduced, volatilization loss of fluoride is reduced and the comprehensive cost of production is reduced.Type: GrantFiled: December 9, 2012Date of Patent: March 25, 2014Assignee: Shenzhen Sunxing Light Alloys Materials Co., Ltd.Inventors: Xuemin Chen, Jun Yang, Zhihong Li, Weiping Wu
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Publication number: 20140050653Abstract: Disclosed is a process for producing a fluorine-containing complex salt, characterized by that, on a reaction mother liquor containing a plurality of cation species and a fluoroanion in a state that they have been dissolved in a solvent, a trigger for accelerating decomposition of the fluoroanion is allowed to act, thereby precipitating a complex salt containing a plurality of cation species and fluorine, as a solid, from the reaction mother liquor. According to this process, it is possible to produce a monodispersed fluorine-containing complex salt with uniform particle size and shape.Type: ApplicationFiled: April 11, 2012Publication date: February 20, 2014Applicant: Central Glass Company, LimitedInventor: Tetsuya Tamura
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Publication number: 20140021355Abstract: The present invention aims at providing a scintillator for high temperature environments which has satisfactory light emission characteristics under high temperature environments; and a method for measuring radiation under high temperature environments. The scintillator for high temperature environments comprises a colquiriite-type crystal represented by the chemical formula LiM1M2X6 (where M1 is at least one alkaline earth metal element selected from Mg, Ca, Sr and Ba, M2 is at least one metal element selected from Al, Ga and Sc, and X is at least one halogen element selected from F, Cl, Br and I), for example, typified by LiCaAlF6, and the crystal optionally containing a lanthanoid element such as Ce or Eu. The method for measuring radiation under high temperature environments uses the scintillator.Type: ApplicationFiled: April 2, 2012Publication date: January 23, 2014Applicants: TOHOKU UNIVERSITY, TOKUYAMA CORPORATIONInventors: Kentaro Fukuda, Noriaki Kawaguchi, Akira Yoshikawa, Takayuki Yanagida, Yui Yokota
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Patent number: 8557209Abstract: A method for cyclically preparing elemental boron and coproducing sodium cryolite using sodium fluoborate as an intermediate material, which includes the following steps: A) adding hydrofluoric acid to boric acid or boron oxide to enable a reaction to form fluoboric acid; B) adding a sodium carbonate aqueous solution to the fluoboric acid to enable a reaction to form the sodium fluoborate; C) putting the sodium fluoborate into a reactor, adding aluminum to react with the sodium fluoborate to form the elemental boron and sodium cryolite; D) extracting the sodium cryolite, sending the sodium cryolite to a rotary reaction kettle together with concentrated sulphuric acid to enable a reaction to form hydrogen fluoride gas and aluminum sodium sulphate, collecting the hydrogen fluoride gas and dissolving it into water to obtain the hydrofluoric acid; E) recycling the obtained hydrofluoric acid to Step A to leach the boric acid or boron oxide.Type: GrantFiled: December 9, 2012Date of Patent: October 15, 2013Assignee: Shenzhen Sunxing Light Alloys Materials Co., Ltd.Inventors: Xuemin Chen, Yueming Yu, Qingdong Ye, Jun Yang, Zhi Zhou
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Patent number: 8414857Abstract: The invention concerns calcium phosphates in granular form having an x-ray diffraction pattern characteristic of hydroxyapatite and good compressibility and flow properties in direct compression applications. The invention also concerns the method for preparing said granules characterized in that it comprises processing a suspension of brushite dicalcium phosphate having a certain particle-size distribution using a basic solution, and maintaining the pH at not less than 7.0 for a sufficient time interval to enable the transformation of the brushite calcium phosphate into hydroxyapatite calcium phosphate.Type: GrantFiled: December 11, 2009Date of Patent: April 9, 2013Assignee: Innophos, Inc.Inventors: John Godber, Lorraine Leite
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Patent number: 8202449Abstract: A fire-retardant composition comprising an ammonium polyphosphate, a suspending agent and an effective amount of a corrosion inhibiting agent. When in solution the corrosion inhibiting agent includes at least one ion selected from the group of ions consisting of aluminum ions, ferric ions, calcium ions and magnesium ions. Said ions complex an effective amount of fluoride ions present in the fire-retardant composition to reduce the corrosiveness of the fire-retardant composition.Type: GrantFiled: October 31, 2006Date of Patent: June 19, 2012Assignee: ICL Performance Products, LPInventors: Andrew Garner, Neville James Stead
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Patent number: 8192715Abstract: The present invention provides a lithium-containing composite oxide for a positive electrode for a lithium secondary battery, which has a large volume capacity density and high safety, and excellent durability for charge and discharge cycles and charge and discharge rate property, and its production method. The lithium-containing composite oxide is represented by the general formula LipNxMyOzFa (where N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, Sn, alkaline earth metal elements and transition metal elements other than Co, Mn and Ni, 0.9?p?1.2, 0.965?x<2.00, 0<y?0.035, 1.9?z?4.2, and 0?a?0.Type: GrantFiled: February 10, 2009Date of Patent: June 5, 2012Assignee: AGC Seimi Chemical Co., Ltd.Inventors: Takeshi Kawasato, Kazushige Horichi, Megumi Uchida, Takuya Mihara, Naoshi Saito
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Patent number: 8101143Abstract: A process for producing a lithium-containing composite oxide for a positive electrode active material for use in a lithium secondary battery, the oxide having the formula LipNxMmOzFa (wherein N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than N, 0.9?p?1.2, 0.9?x<1.00, 0<m?0.03, 1.9?z?2.2, x+m=1 and 0?a?0.02), which comprises using as an M element source a solution comprising a complex containing the M element dissolved in an organic solvent.Type: GrantFiled: September 29, 2006Date of Patent: January 24, 2012Assignee: Seimi Chemical Co., Ltd.Inventors: Takeshi Kawasato, Megumi Uchida, Toshiaki Abe, Naoshi Saito, Manabu Suhara
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Patent number: 8088349Abstract: Disclosed is a clean method for preparing layered double hydroxides (LDHs), in which hydroxides of different metals are used as starting materials for production of LDHs by atom-economical reactions. The atom efficiency of the reaction is 100% in each case because all the atoms of the reactants are converted into the target product since only M2+(OH)2, M3+(OH)3, and CO2 or HnAn? are used, without any NaOH or other materials. Since there is no by-product, filtration or washing process is unnecessary. The consequent reduction in water consumption is also beneficial to the environment.Type: GrantFiled: September 11, 2007Date of Patent: January 3, 2012Assignee: Beijing University of Chemical TechnologyInventors: Xue Duan, Dianqing Li, Zhi Lv, Yanjun Lin, Xiangyu Xu
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Patent number: 7749482Abstract: To provide a process for producing a lithium-containing composite oxide for a positive electrode for a lithium secondary battery, which is excellent in the volume capacity density, safety, charge and discharge cycle durability and low temperature characteristics. A process for producing a lithium-containing composite oxide represented by the formula LipNxMmOzFa (wherein N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than N, 0.9?p?1.2, 0.97?x<1.00, 0<m?0.03, 1.9?z?2.2, x+m=1 and 0?a?0.Type: GrantFiled: July 9, 2007Date of Patent: July 6, 2010Assignee: AGC Seimi Chemical Co., Ltd.Inventors: Kazushige Horichi, Etsuya Kawata
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Publication number: 20100098614Abstract: A process for synthesizing clay particles comprising the step of heating a reactant solution mixture of metal salt and a metal silicate using a radiation source under conditions to form said synthetic clay particles.Type: ApplicationFiled: March 14, 2008Publication date: April 22, 2010Applicant: SHAYONANO SINGAPORE PTE LTDInventor: Mahesh Dahyabhai Patel
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Publication number: 20100016607Abstract: The subject invention relates to a process for the synthesis of highly active binary metal fluoride system for the fluorination of aromatic compounds. Fluorinated aromatic compounds are valuable synthons for the chemical synthesis of pharmaceutical drugs and novel polymers. Fluorobenzene is used to control carbon content in steel manufacturing, is an intermediate for pharmaceuticals, pesticides and other organic compounds. Fluorobenzene is typically produced by the reaction of aniline and sodium nitrite in the presence of hydrogen fluoride. The present invention relates to a process for the synthesis of highly active binary metal fluoride system consists of copper (II) fluoride and aluminum (III) fluoride for the fluorination of aromatic compounds in gas phase and recycling of the reagent, in situ, using O2 and HF.Type: ApplicationFiled: December 11, 2007Publication date: January 21, 2010Applicant: University of Florida Research Foundation Inc.Inventors: William R. Dolbier, JR., Krishna Murthy Janmanchi
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Publication number: 20090267488Abstract: This invention discloses a wavelength converting material. The wavelength converting material comprises a metal haloaluminate compound phosphor with a chemical formula Mw-pAlyOzXq:Rp, wherein M is at least one element selected from the group of Be, Mg, Ca, Sr, Ba and Zn; X is at least one element selected from the group of F, Cl, Br, and I; R is one or more elements selected from the group of the transition metals and at least one element selected from the lanthanide series. Because the emitting wavelength of the metal haloaluminate compound phosphor is 550˜650 nm which is from the green to the red light spectrum, the white light mixed by the converted light of the metal haloaluminate phosphor and the blue light has better color rendering index. Besides, this invention also discloses the optoelectronic devices comprising the metal haloaluminate compound phosphor.Type: ApplicationFiled: April 28, 2009Publication date: October 29, 2009Applicant: EPISTAR CORPORATIONInventors: Yu-Sheng Tang, Ru-Shi Liu, Shu-Fen Hu, Chien-Yuan Wang
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Publication number: 20090087362Abstract: Disclosed herein is a cathode active material coated with a fluorine compound for lithium secondary batteries. The cathode active material is structurally stable, and improves the charge-discharge characteristics, cycle characteristics, high-voltage characteristics, high-rate characteristics and thermal stability of batteries.Type: ApplicationFiled: March 17, 2006Publication date: April 2, 2009Inventors: Yang Kook Sun, Woo Seong Kim, Jung Min Han
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Publication number: 20090032573Abstract: The present invention provides an amorphous caesium aluminium fluoride complex, a process for its production and the use of the complex as a flux, in particular for the soft soldering of aluminium.Type: ApplicationFiled: December 20, 2006Publication date: February 5, 2009Inventors: Gerd J. Harms, Hartmut Hofmann, Klaus-Peter Lehmann, Alexander Schiedt
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Publication number: 20080274037Abstract: The present invention is related to a method for preparing an X-ray amorphous or weakly crystalline metal oxide fluoride of a composition represented by the formula Ma+ObFc comprising the steps of b) providing a precursor, whereby the precursor is a fluorinated metal compound having a composition which is represented by the formula Ma+F(a?d)BdLxb) converting the precursor into an metal oxide/hydroxide fluoride; and c) calcinating the metal oxide/hydroxide fluoride having the formula Ma+OcHfFc to generate the X-ray amorphous or weakly crystalline metal oxide fluoride of the formula Ma+ObFc, whereby M is selected from the group comprising metals of the first, second, third and fourth main group and any subgroup of the periodic table; B is a group or an anion which is selected from the group comprising alkoxide, enolates, alkyl, chloride, bromide, iodide, nitrate, and organic acid anions; B is preferably an alkoxy group; L is a solvent other than water; a is any integer of 1, 2, 3, 4, 5 or 6, preferably 2 or 3;Type: ApplicationFiled: December 5, 2005Publication date: November 6, 2008Applicant: HUMBOLDT-UNIVERSITAET ZU BERLINInventors: Udo Gross, Erhard Kemnitz, Stephan Ruediger
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Patent number: 7211235Abstract: A method is described for the manufacture of hydrotalcites by using at least one compound of a bivalent metal (Component A) and at least one compound of a trivalent metal (Component B), wherein at least one of these components is not used in the form of a solution, characterized in that a) at least one of the Components A and/or B which is not used in the form of a solution, shortly before or during mixing of the components, and/or b) the mixture containing the Components A and B is subjected to intensive grinding until an average particle size (D50) in the range of approx. 0.1 to 5 ?m is obtained, and optionally, after aging treatment or hydrothermal treatment, the resulting hydrotalcite product is separated, dried, and optionally calcinated.Type: GrantFiled: April 18, 2002Date of Patent: May 1, 2007Assignee: Sud-Chemie AGInventors: Max Eisgruber, Jürgen Ladebeck, Jürgen Koy, Hubert Schiessling, Wolfgang Buckl, Herrmann Ebert
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Patent number: 7179566Abstract: A cathode active material for a secondary battery including a lithium-manganese composite oxide having a spinel structure and represented by the following general formula (I), Lia(MxMn2-x-y-zYyAz)(O4-wZw) (I), wherein 0.5?x?1.2, 0?y, 0?z, x+y+z<2, 0?a?1.2 and 0?w?1; M contains at least Co and may further contains at least one element selected from the group consisting of Ni, Fe, Cr and Cu; Y is at least one element selected lo from the group consisting of Li, Be, B, Na, Mg, Al, K and Ca; A is at least one of Ti and Si; and Z is at least one of F and Cl. When the cathode active material for the secondary battery is used as the cathode for the a secondary battery, a higher operating can be realized while suppressing the reliability reduction such as the capacity decrease after the cycles and the deterioration of the crystalline structure at a higher temperature.Type: GrantFiled: March 7, 2003Date of Patent: February 20, 2007Assignee: NEC CorporationInventors: Daisuke Kawasaki, Takehiro Noguchi, Tatsuji Numata
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Patent number: 7090722Abstract: Acid-reactive dental fillers, and methods of making and using such fillers, are disclosed. The acid-reactive dental fillers include a trivalent metal, oxygen, fluorine, an alkaline earth metal, and, optionally, silicon. The acid-reactive dental fillers are preferably nanostructured, for example, in the form of nanoparticles.Type: GrantFiled: May 17, 2004Date of Patent: August 15, 2006Assignee: 3M Innovative Properties CompanyInventors: Kenton D. Budd, Jason P. Thalacker, Sumita B. Mitra, Brant U. Kolb, Lani S. Kangas
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Patent number: 6949233Abstract: A method for preparing a positive active material for a rechargeable lithium battery is provided. In this method, a lithium source, a metal source, and a doping liquid including a doping element are mixed and the mixture is heat-treated.Type: GrantFiled: February 13, 2002Date of Patent: September 27, 2005Assignee: Samsung SDI Co., Ltd.Inventors: Ho-Jin Kweon, Jun-Won Suh, Geun-Bae Kim
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Publication number: 20040185345Abstract: A cathode active material for a secondary battery including a lithium-manganese composite oxide having a spinel structure and represented by the following general formula (I), Lia(MxMn2-x-y-zYyAz)(O4-wZw) (I), wherein 0.5≦x≦1.2, 0≦y, 0≦z, x+y+z<2, 0≦a≦1.2 and 0≦w≦1; M contains at least Co and may further contains at least one element selected from the group consisting of Ni, Fe, Cr and Cu; Y is at least one element selected lo from the group consisting of Li, Be, B, Na, Mg, Al, K and Ca; A is at least one of Ti and Si; and Z is at least one of F and Cl. When the cathode active material for the secondary battery is used as the cathode for the a secondary battery, a higher operating can be realized while suppressing the reliability reduction such as the capacity decrease after the cycles and the deterioration of the crystalline structure at a higher temperature.Type: ApplicationFiled: February 6, 2004Publication date: September 23, 2004Inventors: Daisuke Kawasaki, Takehiro Noguchi, Tatsuji Numata
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Patent number: 6767665Abstract: The invention relates to a method for producing molten salts and their mixings, using an extruder. The starting materials are melted and reacted and the products of the reaction are then guided via a column with alkali salt.Type: GrantFiled: June 8, 2001Date of Patent: July 27, 2004Assignee: BASF AktiengesellschaftInventors: Hans-Leonhard Ohrem, Susanne Brzezinski
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Publication number: 20020142225Abstract: A positive active material composition for a rechargeable lithium battery includes at least one lithiated compound, and at least one additive compound selected from the group consisting of a thermal-absorbent element-included hydroxide, a thermal-absorbent element-included oxyhydroxide, a thermal-absorbent element-included oxycarbonate, and a thermal-absorbent element-included hydroxycarbonate.Type: ApplicationFiled: March 7, 2002Publication date: October 3, 2002Inventors: Ho-Jin Kweon, Jun-Won Suh, Hyun-Sook Jung
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Patent number: 6428778Abstract: A process for synthesis of finely divided antiperspirant suspensions includes providing an antiperspirant salt consisting essentially of an Al salt which is effective as an antiperspirant and which is described by an empirical formula as follows: Al(OH)(3−b)XbzH2O where b=0.4 to 3, z<4, and X=halogen; mixing the Al salt into a non-aqueous oil phase to provide a mixture; and subsequently grinding the mixture with a suitable milling device at a temperature below 80° C. to provide a suspension having a preselected fineness. A perspiration-inhibiting cosmetic preparation includes, as active ingredient, the antiperspirant suspension described above.Type: GrantFiled: May 26, 2000Date of Patent: August 6, 2002Assignee: BK Guilini Chemie GmbH und Co OHGInventors: Johannes Breker, Bruno Kaufmann, Wolfgang Reibel, Klaus Schanz
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Patent number: 6406677Abstract: Processes are provided for preparation of precursors of Group III-V compounds, i.e., nitrides, phosphides, arsenides, antimonides and bismuthides of boron, aluminum, gallium and indium. The precursors are easily converted, e.g., by thermal decomposition, to the Group III-V compounds which are useful as thin-film coatings for aerospace components or as powders which may be shaped as desired.Type: GrantFiled: July 12, 1999Date of Patent: June 18, 2002Assignee: Eltron Research, Inc.Inventors: Michael T. Carter, William J. Donahue
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Patent number: 6350424Abstract: The production of a potassium fluoroaluminate having a low melting point, which can be used as a flux when soldering aluminum. The potassium fluoroaluminate is prepared in an aqueous medium from aluminum hydroxide, hydrogen fluoride and potassium hydroxide in a molar ratio of aluminum:fluorine:potassium of approximately 1:5:2. After drying at 80° C. under vacuum, the resulting potassium fluoroaluminate has a differential scanning calorimetry melting point of about 548° C.Type: GrantFiled: August 18, 1999Date of Patent: February 26, 2002Assignee: Solvay Fluor und Derivate GmbHInventors: Heinz-Joachim Belt, Ruediger Sander, Werner Rudolph
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Patent number: 6221129Abstract: A flux which contains irreversibly dehydrated K2AlF5, for soldering light metal materials, in particular aluminum. The flux has the advantages of forming a very uniform flux coating on the workpiece or workpieces to be soldered and exhibiting outstanding flow of the solder. An appropriate soldering process, an aqueous flux suspension and preparation processes for the flux are also disclosed.Type: GrantFiled: April 25, 2000Date of Patent: April 24, 2001Assignee: Solvay Fluor und Derivate GmbHInventors: Heinz-Joachim Belt, Alfred Borinski, Ruediger Sander, Werner Rudolph
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Patent number: 6207125Abstract: Flux residues from aluminium soldering fluxes composed of alkali metal metallates, especially fluoroaluminates of the alkali metals, in particular potassium and cesium, can be recycled by adding them to the reaction mixture used for the production of hydrogen fluoride from fluorspar and sulfuric acid or oleum. In this way the fluorine content of the flux residues becomes reusable, and the anhydrite which is produced can advantageously be used for conventional purposes.Type: GrantFiled: May 25, 1999Date of Patent: March 27, 2001Assignee: Solvay Fluor und Derivate GmbHInventors: Ulrich Seseke-Koyro, Thomas Born
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Patent number: 6060031Abstract: The device and method of the invention provide a neutralizing compound that reacts with acid gases generated in laser exhaust to yield an insoluble non-toxic powder.Type: GrantFiled: July 27, 1998Date of Patent: May 9, 2000Assignee: TRW Inc.Inventor: Peter M. Livingston
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Patent number: 6004697Abstract: A method of improving certain vanadium oxide formulations is presented. The method concerns fluorine doping formulations having a nominal formula of LiV.sub.3 O.sub.8. Preferred average formulations are provided wherein the average oxidation state of the vanadium is at least 4.6. Herein preferred fluorine doped vanadium oxide materials, electrodes using such materials, and batteries including at least one electrode therein comprising such materials are provided.Type: GrantFiled: December 5, 1997Date of Patent: December 21, 1999Assignees: Minnesota Mining & Manufacturing Co., Hydro-Quebec CorporationInventors: Michael M. Thackeray, Arthur J. Kahaian, Donald R. Visser, Dennis W. Dees, Roy Benedek
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Patent number: 5985233Abstract: The production of a potassium fluoroaluminate having a low melting point, which can be used as a flux when soldering aluminum. The potassium fluoroaluminate is prepared in an aqueous medium from aluminum hydroxide, hydrogen fluoride and potassium hydroxide in a molar ratio of aluminum:fluorine:potassium of approximately 1:5:2. After drying at 80.degree. C. under vacuum, the resulting potassium fluoroaluminate has a differential scanning calorimetry melting point of about 548.degree. C.Type: GrantFiled: October 10, 1997Date of Patent: November 16, 1999Assignee: Solvay Fluor und Derivate GmbHInventors: Heinz-Joachim Belt, Ruediger Sander, Werner Rudolph
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Patent number: 5980650Abstract: A flux which contains irreversibly dehydrated K.sub.2 AlF.sub.5, for soldering light metal materials, in particular aluminum. The flux has the advantages of forming a very uniform flux coating on the workpiece or workpieces to be soldered and exhibiting outstanding flow of the solder. An appropriate soldering process, an aqueous flux suspension and preparation processes for the flux are also disclosed.Type: GrantFiled: January 24, 1996Date of Patent: November 9, 1999Assignee: Solvay Fluor und Derivate GmbHInventors: Heinz-Joachim Belt, Alfred Borinski, Ruediger Sander, Werner Rudolph
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Patent number: 5968288Abstract: A method for the preparation of potassium salts of complex aluminum fluorides which can be used in particular as a flux in particular for soldering lightweight metallic materials. In the method a potassium compound is added to aqueous fluoroaluminic acid, and potassium cryolite or a substance mixture which contains potassium cryolite is added to the resulting suspension. The resulting product is then dried and can be used as a flux for soldering lightweight metallic materials, especially aluminum.Type: GrantFiled: June 4, 1996Date of Patent: October 19, 1999Assignee: Solvay Fluor und Derivate GmbHInventors: Heinrich Willenberg, Wilfried Becher, deceased, Karl-Heinz Hellberg
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Patent number: 5955064Abstract: An enhanced antiperspirant active having improved stability and a process for preparing the enhanced antiperspirant active solution are disclosed, the process comprises blending an enhanced basic aluminum chlorohydrate antiperspirant active having a peak 4 content of at least 20% (Component A) with a zirconium hydroxychloride neutral amino acid complex (component B) and a conventional basic aluminum chloride (Component C) , the order of addition not being critical; wherein at least 10% by weight of the total aluminum being derived from Component A and about 90% to 10% of the aluminum being derived from Component C; thereby forming a stable antiperspirant active solution of enhanced efficacy, the overall concentration of reactants in solution being about 38% to 55% by weight.Type: GrantFiled: October 21, 1997Date of Patent: September 21, 1999Assignee: Westwood Chemical CorporationInventors: Rocco Giovanniello, Nelson Ayala, Jing Shen, Ketan Shah
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Patent number: 5814291Abstract: The present invention is one-step method for synthesizing a synthetic anion intercalated hydrotalcite material. The method comprises reacting an aluminum source with a magnesium source in the presence of an inorganic acid of the anion to be intercalated, and in the absence of a Group IA metal source. The resulting slurry can be dried to form the final product.Type: GrantFiled: May 14, 1997Date of Patent: September 29, 1998Assignee: Aristech Chemical CorporationInventor: Chandrashekhar P. Kelkar
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Patent number: 5663478Abstract: A process is disclosed for treating used aluminum chlorofluoride catalyst either alone or mixed with organics. It involves forming a solution of the catalyst in water or an aqueous acid and then adjusting the pH and/or composition of the aqueous phase formed to precipitate compounds containing the aluminum and/or fluorine.Type: GrantFiled: February 12, 1996Date of Patent: September 2, 1997Assignee: E.I. Du Pont de Nemours and CompanyInventors: William Henry Gumprecht, William Joel Huebner
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Patent number: 5460795Abstract: New crystalline phases of the fluoroaluminum compound AlF.sub.k (OH).sub.3-k and processes for their preparation and conversion to conventional phases, as well as isolation of solid HAlF.sub.4 are disclosed.Type: GrantFiled: November 15, 1994Date of Patent: October 24, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventors: David R. Corbin, Norman Herron, David L. Thorn
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Patent number: 5417954Abstract: New crystalline phases of the fluoroaluminum compounds NH.sub.4 AlF.sub.4 and AlF.sub.3 and processes for their preparation are disclosed.Type: GrantFiled: March 2, 1994Date of Patent: May 23, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventors: Richard L. Harlow, Norman Herron
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Patent number: 5393509Abstract: New crystalline phases of the fluoroaluminum compound AlF.sub.k (OH).sub.3-k and processes for their preparation and conversion to conventional phases, as well as isolation of solid HAlF.sub.4 are disclosed.Type: GrantFiled: September 24, 1993Date of Patent: February 28, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventors: David R. Corbin, Norman Herron, David L. Thorn
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Patent number: 5318764Abstract: Potassium tetrafluoroaluminate and potassium hexafluoroaluminate have been produced by three new processes: (a) by reacting alumina trihydrate with freshly produced, hot, solvated potassium fluoride or potassium bifluoride solution in presence of stoichiometric amounts and/or an excess of hydrogen fluoride, or (b) by reacting aluminum trifluoride trihydrate with hot aqueous solution in potassium fluoride or potassium bifluoride, or (c) by generating in situ potassium aluminate by reacting alumina trihydrate with hot aqueous potassium hydroxide and treating the same with aqueous or anhydrous hydrogen fluoride.Type: GrantFiled: November 9, 1992Date of Patent: June 7, 1994Assignee: Advance Research Chemicals, Inc.Inventors: Dayal T. Meshri, Sampath H. Kumar, Sudhir S. Bhagat, Dinshaw B. Contractor, Sanjay Meshri
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Patent number: 5242669Abstract: An improved method of making high quality potassium tetrafluoroaluminate. Hydrofluoric acid is added to high purity aluminum metal powder to form aluminum fluoride in solution. Nitric acid is added to this solution whereby impurities in the solution dissolve into the nitric acid. Water is then added to the solution to precipitate from the solution solid aluminum fluoride with impurities removed therefrom. The aluminum fluoride is then milled in the presence of hydrofluoric acid and potassium hydroxide whereby the exposure thereto produces the high quality potassium tetrafluoroaluminate which may then be washed and dried.Type: GrantFiled: July 9, 1992Date of Patent: September 7, 1993Assignee: The S. A. Day Mfg. Co., Inc.Inventor: Helmut Flor
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Patent number: 5236679Abstract: This invention provides a method for removing aluminum contamination from phosphoric acid during the acidulation of phosphate rock with sulfuric acid in the presence of recycled phosphoric acid. The method of this invention involves the addition of acid soluble silica to the acidulation slurry and calls for maintaining the molar ratio of non-fluosilicate fluoride (i.e. fluoride not complexed with silica) to aluminum in the liquid phase of the acidulation slurry between 2.5 and 5.0. These conditions favor the precipitation of aluminum as calcium tetrafluoaluminate dihydrate and enable the co-removal of this compound by filtration with by-product gypsum. This invention is particularily suitable for the processing of phosphate rocks with high iron and aluminum contents, such as the nonsedimentary phosphate rocks occurring in Sri Lanka.Type: GrantFiled: May 6, 1992Date of Patent: August 17, 1993Assignee: Freeport-McMoRan Resource PartnersInventors: John W. Wen, Charles W. Weston
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Patent number: 5045300Abstract: A process comprising the reaction of an amine.aluminum trichloride complex and a bifluoride compound to produce an aluminum fluoride compound. Exemplary processes include the reaction of AlCl.sub.3.N(CH.sub.2 CH.sub.3) and NH.sub.4 HF.sub.2 or NaHF.sub.2 to respectively produce NH.sub.4 AlF.sub.4 or Na.sub.5 Al.sub.3 F.sub.14.Type: GrantFiled: October 23, 1990Date of Patent: September 3, 1991Assignee: Ethyl CorporationInventor: Everett M. Marlett
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Patent number: 4940477Abstract: The present invention is directed to a method for synthesizing fluorine-containing, aluminosilicate crystals having a stoichiometry approximating that of topaz. The method comprises three basic steps:(1) vapors of a readily-oxidizable compound of silicon and of a readily-oxidizable compound of aluminum and fluorine are passed to a flame oxidation burner;(2) amorphous fluorine-containing, aluminosilicate particles resulting from the combustion of those gases are collected; and(3) the collected particles are sintered into an integral body at a temperature between about 650.degree.-925.degree. C.Type: GrantFiled: July 19, 1989Date of Patent: July 10, 1990Assignee: Corning IncorporatedInventors: Peter L. Bocko, David H. Crooker, Lina M. Echeverria
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Patent number: 4692323Abstract: The invention concerns a process for separating magnesium-based impurities contained in a wet-process produced phosphoric acid. This process comprises adding an ammonium compound R(NH.sub.4) soluble in the said phosphoric acid, and, where called for, a fluorine compound and an aluminum compound to this phosphoric acid so as to induce a reaction forming an insoluble complex (NH.sub.4).sub.x (Mg).sub.y (Al).sub.z (F, OH).sub.6 ; this complex crystallizes in large grains and is easily separated subsequently by filtration and decantation.Type: GrantFiled: June 12, 1986Date of Patent: September 8, 1987Assignee: Centre National de la Recherche Scientifique (C.N.R.S.)Inventors: Gilbert Bonel, Jean C. Heughebaert, Mohamed Chaabouni, Hassine Ayedi
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Patent number: 4640828Abstract: A process for separating and removing substantial amounts of magnesium and other ion impurities from wet process phosphoric acid of 35-45% P.sub.2 O.sub.5 content is provided. The process steps comprise: (a) heating the acid while maintaining the acid at a concentration of 35-45% P.sub.2 O.sub.5 by the addition of water for a time sufficient to effect removal of silicon as fluosilicic acid and/or silicon tetrafluoride, thereby forming a stripped acid; (b) precipitating ralstonite from the heated stripped acid; and (c) separating the precipitated ralstonite from the acid.Type: GrantFiled: October 22, 1985Date of Patent: February 3, 1987Assignee: International Minerals & Chemical Corp.Inventor: Arthur N. Baumann