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| Number | Title | Issue Date |
| 7892518 | Method of fluorination A method of fluorination comprising reacting monosaccharides, oligosaccharides, polysaccharides, composite saccharides formed by bonding of these saccharides with proteins and lipids and saccharides having polyalcohols, aldehydes, ketones and acids of the polyalcoho... | 02/22/2011 |
| 7413722 | Method and apparatus for manufacturing nitrogen trifluoride A method and apparatus for manufacture of NF3 by gas-liquid phase reaction of fluorine and ammonia in molten ammonium acid fluoride (AAF) in a static reactor in which the reactants are conveyed primarily by thermal conduction or siphon. Optimally, the rea... | 08/19/2008 |
| 7371363 | Methods of purifying hydrogen fluoride Provided are methods of producing anhydrous hydrogen fluoride comprising: providing a mixture comprising hydrogen fluoride and at least one halogenated hydrocarbon; and extracting hydrogen fluoride from the mixture by contacting the mixture with a solution of less t... | 05/13/2008 |
| 7361795 | Azeotrope-like compositions of 1,1,1,3,3-pentafluorobutane and hydrogen fluoride The invention relates to azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentafluorobutane (HFC-365) and hydrogen fluoride and a process for separating the azeotrope-like mixtures. The compositions of the invention are useful as an intermediate in the production... | 04/22/2008 |
| 7311890 | Process for the production of fluorinated organic compounds and fluorinating agents A process for the production of a fluorinated organic compound, characterized by fluorinating an organic compound having a hydrogen atoms using IF5; and a novel fluorination process for fluorinating an organic compound having a hydrogen atoms by using a f... | 12/25/2007 |
| 7288201 | Methods for removing moisture from hydrogen halides A composition comprising a magnesium halide coated macroporous carbonaceous substrate is provided for effecting moisture removal from a hydrogen halide fluid. Moisture removal is effected by intimately contacting the hydrogen halide fluid with the magnesium halide c... | 10/30/2007 |
| 7128885 | NF3 production reactor A process for the production of nitrogen trifluoride by reacting fluorine gas and liquid ammonia acid fluoride in a first reaction zone having a relatively low energy input followed by treatment of the resulting reaction product in a second reaction zone having a re... | 10/31/2006 |
| 7083773 | Method for producing nitrogen trifluoride using jet-loop reactors Nitrogen trifluoride is produced with a high yield by the method comprising forming a fast stream of micro droplets of a fused ammonium fluoride salt by rapidly ejecting the fused ammonium fluoride salt into a reactor through a nozzle while circulating the fused amm... | 08/01/2006 |
| 7063823 | Depleted UFprocessing plant and method for processing depleted UF A depleted UF6 processing plant including a first fluidized bed reactor configured to react depleted UF6 with steam to produce UO2F2 and hydrogen fluoride, a second fluidized bed reactor connected to the first fluidized be... | 06/20/2006 |
| 7045107 | Process for the production of nitrogen trifluoride The present invention is directed to an improved reaction process that allows for the achievement of excellent NF3 production yields, while minimizing the amount of unreacted fluorine exiting with the process gases and minimizing the amount of liquid melt... | 05/16/2006 |
| 7037480 | Calcium chloride purification Significant amounts of soluble fluoride, known to create problems in processes requiring high quality grade calcium chloride, are removed from calcium chloride solution using hydroxyapatite as a removal mechanism. Under acidic conditions, calcium chloride solution i... | 05/02/2006 |
| 7021487 | Processing method for high pressure gas container and halogen containing gas filled in said container A metal container to be filled with a halogen containing gas, with the inner surface processed with a polishing agent. The gas has a reduced purity decline by the increase of the water content or impurities from the inner surface of the container which is absorbed b... | 04/04/2006 |
| 7014824 | Method for purifying process waste gases The present invention relates to a method for purifying process waste gases by introducing them into a waste gas purification system that includes a reaction chamber and by post-treating the reaction products that leave the reaction chamber in a washing or sorbtion ... | 03/21/2006 |
| 6998054 | Selective fluoride and ammonia removal by chromatographic separation of wastewater A process for fluoride removal from wastewater streams produced during industrial operation for further industrial use or to comply with environmental regulations. The process segregates the removal of fluoride and fluorosilicate ions, from the totality of ions in t... | 02/14/2006 |
| 6984366 | Method for nitrogen trifluoride production A method for the production of nitrogen trifluoride from a fluorine reactant and an ammonium ion source that is dispersed within a liquid phase reaction mixture containing one or more perfluorocarbon fluids is disclosed herein. In one embodiment, the fluorine reacta... | 01/10/2006 |
| 6863780 | Process of separating/purifying pentafluoropropane There is provided an azeotropic mixture having 1,1,1,3,3-pentafluoropropane and hydrogen fluoride. Further, there is provided a process of separating/purifying R-245fa and/or HF from a mixture of R-245fa and HF wherein the mixture of 1,1,1,3,3-pentafluoropropane and... | 03/08/2005 |
| 6858198 | Method for regulating water concentration in a process stream Provided is a method for regulating the concentration of water in the acid feed stream in a process for the production of HF by the reaction with a fluorine containing material, the method comprising: (a) providing an acid feed str... | 02/22/2005 |
| 6841140 | Method and apparatus for producing hydrogen fluoride As to a reactor which is used in a process for producing hydrogen fluoride through a reaction of fluorite with sulfuric acid, and which comprises means for applying a shearing force to a content therein between the means and an inner surface thereof, a metal materia... | 01/11/2005 |
| 6821351 | Hydrofluoric acid generating composition and method of treating surfaces The present invention relates to compositions, kits and processes for the brightening of metal surfaces by the application of the chemical compositions. These compositions act to release hydrofluoric acid as a brightening agent. The solutions are preferably mixed du... | 11/23/2004 |
| 6790428 | Process for the reduction or elimination of NH3/HF byproduct in the manufacture of nitrogen trifluoride A process for reducing or eliminating NH3/HF/MFz liquid waste melt in the manufacture of NF3 is provided which includes the steps of providing an NF3 reactor for a reaction of F2 with a liquid NH3/HF/MFz mixture... | 09/14/2004 |
| 6673326 | Catalytic processes for the reduction of perfluorinated compounds and hydrofluorocarbons A process for reducing perfluorinated compounds and/or hydrofluorocarbon compounds in a sample uses a catalyst made from aluminum oxide (Al2 O3), and one or more enhancers selected from the group consisting of nickel, cobalt, and sul... | 01/06/2004 |
| 6660893 | Hydrogen fluoride recovery process A process for separating and recovering hydrogen fluoride from a mixture with an organic compound especially a fluorine-containing compound by extraction with a solution of an alkali metal fluoride in hydrogen fluoride, phase separation and recovery. A pr... | 12/09/2003 |
| 6605193 | Recovery of HFC-32 A method for isolating 32 from a crude mixture containing HCl and an azeotropic mixture of 32 and HF is provided without the need to isolate any HF azeotrope.... | 08/12/2003 |
| 6602480 | Method for treating waste gas containing fluorochemical A method for decomposing a fluorine-containing compound by contacting an exhaust gas 1 containing a fluorine-containing compound, such as C2 F6, with aluminum oxide 3, such as γ-alumina, which has been heated to a high temperature o... | 08/05/2003 |
| 6579377 | Hydrofluoric acid generating composition and method of treating surfaces The present invention relates to compositions, kits and processes for the brightening of metal surfaces by the application of the chemical compositions. These compositions act to release hydrofluoric acid as a brightening agent. The solutions are preferab... | 06/17/2003 |
| 6555086 | Hydrogen fluoride recovery process Processes for separating and recovering hydrogen fluoride from a gaseous mixture of an organic compound and hydrogen fluoride are disclosed. The processes include contacting the gaseous mixture with a solution of an alkali metal fluoride in hydrogen fluor... | 04/29/2003 |
| 6540882 | Processes for the synthesis of pentafluorobutane and the separation of hydrogen fluoride and pentafluorobutane mixtures The invention relates to a process of separation of mixtures containing HFC-365mfc/HF azeotropic compositions by two distillations at different pressures, as well as to a process of synthesis of HFC-365mfc which integrates this process of separation and a... | 04/01/2003 |
| 6521199 | Regeneration of onium fluoride-HF adducts Hydrogen fluoride adducts and ammonium fluorides are used for fluorinating acid chlorides and halocarbon compounds such as chloroalkanes or chloronated ethers. The used adducts can be regenerated and then reused in the fluorination reactions.... | 02/18/2003 |
| 6482979 | Perfluorinated acid fluorides and preparation thereof A method for the preparation of a perfluorinated acid fluoride (especially 3-alkoxy propionic acid fluoride) is provided. The method results in high yields of the acid fluoride.... | 11/19/2002 |
| 6468490 | Abatement of fluorine gas from effluent An effluent abatement system 200 that may be used to abate F2 gas content of effluent exhausted from a process chamber 35, such as effluent from a CVD chamber cleaning process includes a catalytic reactor 250 to reduce the content of F2 | 10/22/2002 |
| 6451274 | Depleted UF6 processing plant and method for processing depleted UF6 The object of the present invention is to simplify the depleted UF6 processing plant and processing method and to prevent calcium fluoride to be a fine powder, wherein the processing plant comprises a first fluidized bed reactor for forming UO | 09/17/2002 |
| 6440224 | Hydrofluoric acid generating composition and method of treating surfaces A method of treating a surface of a metal is provided. A source of fluoride ion is mixed with a source of acid to form hydrofluoric acid and, when applied to a metal surface to be treated, the hydrofluoric acid acts as a brightening agent.... | 08/27/2002 |
| 6428764 | Process for the production of calcium fluoride A process is disclosed for producing calcium fluoride. The process comprises (a) mixing phosphate rock with aqueous H2 SiF6 at ambient temperature for at least one hour; (b) nucleating the calcium fluoride in the slurry prepared in s... | 08/06/2002 |
| 6423290 | Method for recovering an organic solvent from an acidic waste stream such as in integrated chip manufacturing An organic solvent is separated from a waste stream comprising hydrofluoric acid, an organic solvent and etchant contaminants. The process comprises separating the hydrofluoric acid by subjecting the waste stream to at least one of the following processes... | 07/23/2002 |
| 6387340 | Manufacturing method for lithium hexafluoro phosphate A method of preparing lithium hexafluoro phosphate (LiPF6) using phosphorous pentachloride (PCl5), lithium chloride (LiCl), and hydrogen fluoride (HF) as raw materials. The method includes the steps of: (a) reacting the phosphorous p... | 05/14/2002 |
| 6375808 | Process for producing difluoromethane A process for refining difluoromethane by removing hydrogen fluoride, which is contained in difluoromethane difficult to remove. The process involves distilling a mixture of difluoromethane with hydrogen fluoride where the mixture is in contact with sulfu... | 04/23/2002 |
| 6365122 | Process for manufacturing potassium sulfate fertilizer and other metal sulfates A new process of preparing potassium sulfate fertilizer and other metal sulfates from the chlorides and other halides of these metals. The process utilizes the discovery that sulfur dioxide or trioxide, when introduced as a fluidizing medium into shallow ... | 04/02/2002 |
| 6355221 | Process for removing soluble fluoride from a waste solution containing the same The present invention relates to a process for recovery of particulate calcium fluoride from a waste solution containing soluble fluoride. More specifically, the invention relates to a process for removal of soluble fluoride from and recovery of fluorspar... | 03/12/2002 |
| 6352677 | Process to produce commercial grade anhydrous hydrogen fluoride (AHF) and uranium oxide from the delfuorination of uranium hexafluoride (UF6) The invention relates to a method for recovering products from the defluorination of uranium hexafluoride. Recovered are a commercial grade anhydrous hydrogen fluoride and triuranium oxide through the use of two distinct reactors.... | 03/05/2002 |
| 6350426 | Method of determining component concentrations in three-component mixture and method of continuous production of hydrogen fluoride using the method A method of quickly and safely determining the component concentrations of a three-component mixture comprising substantially sulfuric acid, hydrogen fluoride and water, which comprises measuring at least one set of three physical quantities of (1) temper... | 02/26/2002 |
