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| Number | Title | Issue Date |
| 7524480 | Process for producing manganese fluoride Disclosed is a process for producing manganese fluoride, comprising a step (1) of allowing a manganese compound such as MnF2 having been dried at a temperature of not lower than 100° C. to react with a fluorinating agent such as F2 at a temper... | 04/28/2009 |
| 7404943 | Methods for solubilizing and recovering fluorinated compounds Methods of enhancing the solubility of a fluorinated compound in an organic solvent are provided. In one embodiment, carbon dioxide gas pressure is applied to the solvent at a pressure effective to enhance the solubility of the fluorinated compound. The method may f... | 07/29/2008 |
| 7395823 | Method and apparatus for local fluorine and nitrogen trifluoride production The present invention relates to a process for production, shipment, and treatment of a NH4F(HF)x feedstock for local production of fluorine and NF3 for semiconductor chamber cleaning without the need for storage of large quantities ... | 07/08/2008 |
| 7364715 | As-grown single crystal of alkaline earth metal fluoride A single crystal of alkaline earth metal fluoride is produced by a single crystal pulling method, has a straight barrel part diameter of not less than 17 cm, preferably has a straight barrel part length of not less than 5 cm, and has a light transmittance, as measur... | 04/29/2008 |
| 7316838 | Low cost electrically conductive carpeting manufactured from conductive loaded resin-based materials Conductive carpeting is formed of a conductive loaded resin-based material. The conductive loaded resin-based material comprises micron conductive powder(s), conductive fiber(s), or a combination of conductive powder and conductive fibers in a base resin host. The p... | 01/08/2008 |
| 7261872 | Method for producing metal fluoride materials A method of producing nano metal fluoride powders comprising the steps of mixing an aqueous or organic continuous phase comprising at least one metal cation salt with a hydrophilic or organic polymeric disperse phase forming a metal cation salt/polymer gel and then ... | 08/28/2007 |
| 7175823 | Purification method for producing high purity niobium compound and/or tantalum compound The present invention provides a method enabling the high purification of a niobium compound and/or tantalum compound in a simplified manner at a low cost. This is accomplished by providing a method enabling the high purification of a niobium compound and/or tantalu... | 02/13/2007 |
| 7095774 | Cathodes for fluorine gas discharge lasers A fluorine gas discharge laser electrode for a gas discharge laser having a laser gas containing fluorine and a method for manufacturing an electrode is disclosed. The electrode may include a copper and copper alloy body having an upper curved region containing a di... | 08/22/2006 |
| 7090809 | Production of aluminum compounds and silica from ores A method for the production of inorganic aluminum substances and amorphous silica from aluminum oxide containing ores, comprising: (a) leaching of said ores with fluorosilicic acid to obtain aluminum fluosilicate solution; (b) filtering said leached solution from in... | 08/15/2006 |
| 7033563 | Method for reducing oxygen component and carbon component in fluoride A method for reducing oxygen and carbon components in high-purity fluoride such as calcium fluoride and barium fluoride (a high-purity fluoride that is not limited to calcium fluoride and barium fluoride), or in rare-earth fluorides such as ytterbium fluoride and ce... | 04/25/2006 |
| 6989060 | Calcium fluoride crystal and method and apparatus for using the same A calcium fluoride crystal produced in accordance with a method for producing calcium fluoride crystal on the basis of refining a raw material of calcium fluoride and causing crystal growth of the refined calcium fluoride, the method including a process of raising a... | 01/24/2006 |
| 6986874 | Method and apparatus for the production of nitrogen trifluoride The present invention provides a method and apparatus for producing nitrogen trifluoride. The method comprises contacting a fluorine-containing feed stream with liquid ammonium acid fluoride in a reaction zone for time and under conditions sufficient to produce nitr... | 01/17/2006 |
| 6903040 | Continuous process and apparatus for the efficient conversion of inorganic solid particles The invention pertains to a continuous process for the conversion of inorganic solid starting particles which either are amorphous or possess a degree of order into inorganic solid product particles which (a) when the starting particles are amorphous, p... | 06/07/2005 |
| 6896866 | Method for purification of tungsten hexafluoride A method for purifying tungsten hexafluoride of high purity, capable of producing tungsten hexafluoride of higher purity than that of the related art, readily and at a low cost. A method for purifying tungsten hexafluoride of high purity, characterized in that tungs... | 05/24/2005 |
| 6790419 | Purification of gaseous inorganic halide The present invention provides an apparatus and method for the purification of gaseous inorganic halides utilizing a reactive metal and molecular sieves to remove impurities. ... | 09/14/2004 |
| 6780390 | Method of producing high purity germanium tetrafluoride A method of producing high purity germanium tetrafluoride comprising the step of flowing a mixture of inert gas and fluorine gas through a reactor chamber preferably containing germanium powder. The reactor effluent stream is conducted through at least one product t... | 08/24/2004 |
| 6770253 | Process for producing silicon tetrafluoride A process for producing silicon tetrafluoride includes reacting at 250° C. or higher elemental silicon with hydrogen fluoride, thereby producing a gas product containing silicon tetrafluoride. This reaction can be conducted such that the gas product contains at lea... | 08/03/2004 |
| 6649326 | Photolithographic method and UV transmitting fluoride crystals with minimized spatial dispersion The invention provides a UV below 200 nm lithography method. The invention includes providing a below 200 nm radiation source for producing | 11/18/2003 |
| 6645451 | Method of preparing inorganic pentafluorides The preparation of phosphorus pentafluoride and arsenic pentafluoride by reacting corresponding trihalides with elemental chlorine, bromine or iodine and also with hydrogen fluoride.... | 11/11/2003 |
| 6635231 | Preparation of arsenic pentafluoride A process for the preparation of high purity arsenic pentafluoride in high yield. The process uses sulfur trioxide or oleum and an excess of hydrogen fluoride to react arsenic acid or arsenic pentoxide in a reaction medium containing an excess of hydrogen... | 10/21/2003 |
| 6596252 | Recycling of spent pot linings A process is described for the treatment of spent pot lining material from electrolyte reduction cells, this spent material having a substantial content of cryolite. The spent material is first leached with water at a dilution and a time sufficient to dis... | 07/22/2003 |
| 6524546 | Process for making calcium chlorides A new process for producing calcium chloride and other metal halides from the carbonates, bicarbonates, oxides of these metals. The process utilizes the discovery that hydrogen halides, when used in a true or conventional fluidizing medium in shallow beds... | 02/25/2003 |
| 6507020 | Halide compound mass spectrometry method and mass spectrometry apparatus A mass spectrometry apparatus is provided with an emitter for emitting metal ions, a reaction chamber where the detected gas is introduced and ionized by the metal ions, an aperture for guiding molecules of the ionized detected gas, and a mass spectromete... | 01/14/2003 |
| 6436362 | Process for preparing aluminum fluoride Process for preparing aluminum fluoride which comprises fluorination of alumina with gaseous HF, characterized in that the alumina is fluorinated with HF at an initial temperature lower than 300° C., the temperature is raised with a temperature gradient ... | 08/20/2002 |
| 6342194 | NF3 treating process A process for treating NF3 useful as a dry etching gas and cleaning gas in processes for producing LSI, TFT, and solar cell and in an electron photographic processes. The treating process comprises following step: (a) preparing a reactor includ... | 01/29/2002 |
| 6316377 | Rare earth oxide fluoride nanoparticles and hydrothermal method for forming nanoparticles A hydrothermal method for forming nanoparticles of a rare earth element, oxygen and fluorine has been discovered. Nanoparticles comprising a rare earth element, oxygen and fluorine are also described. These nanoparticles can exhibit excellent refractory p... | 11/13/2001 |
| 6187280 | Process for the preparation of aluminum fluoride Process for preparing aluminum fluoride having an high surface area and high pore volume comprising the fluorination with HF of alumina having surface area of at least 150 m2 /g and pore volume not lower than 0.3 cc/g, said alumina comprising f... | 02/13/2001 |
| 6187275 | Recovery of AlF3 from spent potliner A method of recovering AlF3 from spent potliner using an acid digest to form gaseous HF which is converted to hydrofluoric acid and reacted with alumina trihydrate to form AlF3.... | 02/13/2001 |
| 6153164 | Method for producing uranium oxide from uranium tetrafluoride and a phyllosilicate mineral A method for producing uranium oxide includes combining uranium tetrafluoride and a phyllosilicate mineral containing a solid oxidizing agent within the mineral's structure having a lower thermodynamic stability than the uranium oxide; heating the combina... | 11/28/2000 |
| 6146601 | Enrichment of silicon or germanium isotopes Isotopes of either germanium or silicon are separated by a chemical exchange reaction. Preferably the compound is a hydro halide or halide composition and the donor can be a wide variety of compounds such as a lower molecular weight alcohol.... | 11/14/2000 |
| 6123908 | Method of treating spent potliner material from aluminum reduction cells A process of treating spent potliner material from aluminum reduction cells and recovering useful products. In the process of the present invention, spent potliner material is introduced into an acid digester containing, for example, sulfuric acid. As a r... | 09/26/2000 |
| 6103212 | Method for making UHP tungsten hexafluoride This invention is directed to a method for producing UHP tungsten hexafluoride by introducing an amount of crude tungsten hexafluoride to an evaporating process for separation into an amount of tungsten hexafluoride-containing volatile impurities and an a... | 08/15/2000 |
| 6080210 | Process for producing aluminum fluoride particles A process for producing aluminum fluoride particles having a smooth surface, comprising the steps of adding aluminum fluoride seed crystals to a super-saturated solution of aluminium fluoride; allowing aluminum fluoride particles to be precipitated under ... | 06/27/2000 |
| 6060031 | Method for neutralizing acid gases from laser exhaust 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.... | 05/09/2000 |
| 6028026 | Cubic chromium trifluoride and its use for halogenated hydrocarbon processing This invention provides a crystalline chromium fluoride having a cubic crystal structure (i.e., chromium trifluoride having an X-ray diffraction powder pattern as shown in Table I); and a catalytic composition comprising cubic chromium trifluoride. This i... | 02/22/2000 |
| 5955042 | Method of treating spent potliner material from aluminum reduction cells A process for treating spent potliner material from aluminum reduction cells and recovering useful products. In the process, spent potliner material is introduced into an acid digester containing, for example, sulfuric acid. A gas component is produced wh... | 09/21/1999 |
| 5910294 | Abatement of NF3 with metal oxalates A process for abating NF3 by contacting it with a metal oxalate or carbonate.... | 06/08/1999 |
| 5891361 | Method for preparing small particle size fluoride up-converting phosphors Spherical particles of fluoride up-converter phosphors having a particle size of 1 micron and less can be made from their corresponding precursor hydroxycarbonate particles by heating the hydroxycarbonate particles in an oxygen-containing atmosphere to co... | 04/06/1999 |
| 5830424 | Method of extracting fluorine from minerals or mineral species A method of extracting a mineral or mineral species comprising contacting the mineral or mineral species with a leachate solution which contains metal or metalloid ions capable of forming soluble fluoro-complexes of high bond strength with fluorine in the... | 11/03/1998 |
| 5707406 | Method of manufacturing aluminum fluoride anhydride A method of manufacturing aluminum fluoride anhydride by means of a wet method. This method is featured in that a seed crystal of AlF3.3H.sub.2 O containing not more than 5% of fine particle 40 μm or less in diameter is added into the super-sa... | 01/13/1998 |
