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| Number | Title | Issue Date |
| 7785559 | Method of forming hypobromous acid in aqueous system A method which especially can safely produce a hypobromous acid or a water-soluble salt thereof, that does not require expensive equipment or the like, does not involve extra work such as pre-mixing or have restrictions such as producing immediately prior to use, an... | 08/31/2010 |
| 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 |
| 7351391 | System and method for converting the spent remnants of a first pickling acid solution into a usable second pickling acid solution A system and method of economically converting a spent first pickling acid solution that contains hydrochloric acid, water and ferrous chloride into a suitable second pickling solution. Sulfuric acid is added to the first pickling acid solution. This produces a rege... | 04/01/2008 |
| 7311799 | Hydrofluoric acid wastewater treatment method and device The invention provides a hydrofluoric acid wastewater treatment method that achieves efficient recovery of hydrofluoric acid from hydrofluoric acid wastewater and also achieves sufficient reduction in the hydrofluoric acid concentration of the dehydrofluorinated wat... | 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 |
| 7186395 | Iron oxides with a higher degree of refining Iron oxides are upgraded by calcining at from 700 to 1200° C. ... | 03/06/2007 |
| 7175819 | Regeneration of cupric etchants and recovery of copper sulfate Spent, acidic solutions comprising cupric chloride and hyrdrochloric acid from the copper etching process are regenerated by a process in which the acid is subjected to distillation with sulfuric acid. In one embodiment, the process comprises (a) providing a spent e... | 02/13/2007 |
| 7163665 | Apparatus for decomposing gaseous aliphatic hydrocarbon halide compounds A method for decomposing a gaseous aliphatic hydrocarbon halide compound more simply is provided. The method includes the steps of mixing the gaseous aliphatic hydrocarbon halide compound and a chlorine gas-containing gas and emitting light to a mixture gas of the g... | 01/16/2007 |
| 7163615 | Method of treating substance to be degraded and its apparatus There is provided a method of treating a substance to be degraded comprising the steps of: degrading the substance to produce a degraded product; contacting the product obtained in the degrading step with a liquid; and entrapping a component of the product not trapp... | 01/16/2007 |
| 7128890 | Purification of hydrochloric acid obtained as by-product in the synthesis of methanesulfonic acid Process for purifying the hydrochloric acid obtained as by-product in the synthesis of MSA, characterized in that the gaseous flow of hydrogen chloride evacuated from the top of the synthesis reactor is placed in contact in a treatment column, counter-currentwise, w... | 10/31/2006 |
| 7108784 | Apparatus for removal and destruction of ammonia from an aqueous medium Methods and apparatuses are provided for the removal and destruction of ammonia from an aqueous medium. The methods and apparatuses include the removal of ammonia from an aqueous medium by contact with either natural or synthetic zeolite. The spent zeolite is re-gen... | 09/19/2006 |
| 7105087 | Hexa-valent chromium removal from aqueous media using ferrous-form zeolite materials Systems and methods are provided for the removal and disposal of chromium form an aqueous medium. The systems and methods include the removal of chromium from a source by contact with either natural or synthetic zeolite that has been modified with a ferrous ion or o... | 09/12/2006 |
| 7060242 | Method for treating waste materials containing halogen In a method for the treatment of halogen containing waste materials wherein valuable materials and/or energy can be recuperated without the generation of additional halogenated waste materials, the halogen containing waste materials are mixed with a molten substitut... | 06/13/2006 |
| 7045110 | High yield co-production of anhydrous hydrogen bromide and sodium bisulfate A batch process for co-producing anhydrous hydrogen bromide and a purified bisulfate salt comprising: (a) charging a batch reactor with a bromide salt slurry, wherein the slurry is more than 50% by weight bromide salt; (b) reacting the slurry with sulfuric acid in a... | 05/16/2006 |
| 7045111 | High yield co-production of anhydrous hydrogen bromide and sodium bisulfate A process for co-producing anhydrous hydrogen bromide and a purified bisulfate salt by (a) reacting a bromide salt with sulfuric acid to produce crude hydrogen bromide and crude bisulfate salt; (b) purifying the crude hydrogen bromide to produce anhydrous hydrogen b... | 05/16/2006 |
| 7045109 | Conversion of sodium bromide to anhydrous hydrobromic acid and sodium bisulfate Process for the conversion of sodium bromide to anhydrous hydrobromic acid and sodium bisulfate, said process with the following sequential steps: reaction of sodium bromide and sulfuric acid in a solution of water to produce hydrobromic acid and sodium bisulfate wh... | 05/16/2006 |
| 7018514 | Method and apparatus for processing substances to be decomposed A method for processing substances to be degraded is provided. The method includes a decomposing step in which a mixed gas containing chlorine and the substances to be degraded is irradiated with light to decompose the substances to be degraded, a contact step in wh... | 03/28/2006 |
| 7015142 | Patterned thin film graphite devices and method for making same In a method of making graphite devices, a preselected crystal face of a crystal is annealed to create a thin-film graphitic layer disposed against selected face. A preselected pattern is generated on the thin-film graphitic layer. A functional structure includes a c... | 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 |
| 6955840 | Liquid crystal display device having thin glass substrate on which protective layer formed and method of making the same The LCD according to present invention includes a first substrate and a second substrate, two protective layers including at least one layer formed on outer surface of the first and second substrates, a transparent electrode formed on inner surface of the first subs... | 10/18/2005 |
| 6946055 | Method for recovering an organic solvent from a waste stream containing supercritical CO2 An organic solvent is separated from a waste stream containing supercritical CO2, an organic solvent and etchant contaminants. The process includes separating the supercritical CO2 by subjecting the waste stream to elevated temperature and/or r... | 09/20/2005 |
| 6946105 | Process and apparatus for the recovery of metal oxide particles A process for the recovery of metal oxides from a solution containing metallic salts by spray roasting of these solutions. The process is particularly suitable for spray roasting spent pickling acids. The process feeds the solution to a reactor for spray roasting of... | 09/20/2005 |
| 6936566 | Modified metalloaluminophosphate molecular sieves The invention is directed to a method for modifying a microporous metalloaluminophosphate molecular sieve, the method comprising the steps of a) introducing a compound containing at least one M-X group within the cages of said microporous molecular sieve; and b) rea... | 08/30/2005 |
| 6933417 | Process for vinyl chloride manufacture from ethane and ethylene with partial CHl recovery from reactor effluent A process for producing vinyl chloride monomer from ethylene and ethane having input of significant quantities of both ethane and ethylene in input streams to the affiliated reactor where hydrogen chloride in the reactor effluent is only partially recovered from the... | 08/23/2005 |
| 6909024 | Process for the conversion of ethylene to vinyl chloride and novel catalyst compositions useful for such process This invention is a process for producing vinyl chloride from an ethylene-containing feed, oxygen, and a chlorine source in the presence of a catalyst. The process permits direct production of vinyl chloride in a single reactor system, and further permits ethane to ... | 06/21/2005 |
| 6906233 | Modified metalloaluminophosphate molecular sieves The invention is directed to a method for modifying a microporous metalloaluminophosphate molecular sieve, the method comprising the steps of a) introducing a compound containing at least one M-X group within the cages of said microporous molecular sieve; and b) rea... | 06/14/2005 |
| 6896865 | Method for recovering hydrogen chloride from chlorine based waste and use of recovered hydrogen chloride To provide a process for recovering high quality hydrogen chloride rationally with good economical efficiency, particularly hydrogen chloride with an elevated quality level to be provided as the feedstock for the oxychlorination reaction in producing dichloroethane ... | 05/24/2005 |
| 6890508 | Preparation of largely HBr-free HCI gas and largely HBr-free aqueous HCI solution The present invention relates to a process for preparing largely HBr-free HCl gas and largely HBr-free aqueous HCl solution, which comprises the following steps: a) providing HBr-containing HCl gas; b) passing the HBr-containing HCl gas thr... | 05/10/2005 |
| 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 |
| 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 |
| 6811763 | Conversion of sodium bromide to anhydrous hydrobromic acid and sodium bisulfate Process for the conversion of sodium bromide to anhydrous hydrobromic acid and sodium bisulfate, said process with the following sequential steps: reaction of sodium bromide and sulfuric acid in a solution of water to produce hydrobromic acid and sodium bisulfate wh... | 11/02/2004 |
| 6797240 | Process and apparatus for the extraction and regeneration of acids from spent acids Process and apparatus for regenerating spent acid liquor includes a primary roasting furnace for evaporating a substantial portion of the liquid from the spent acid to produce acid vapors and partially roasted metal salts. The partially roasted metal salts are trans... | 09/28/2004 |
| 6793905 | Method for producing high-purity hydrochloric acid This invention relates to a novel method, which can be carried out according to industrial standards, for producing high-purity hydrochloric acid with a very low particle content, for use in the production of semiconductors. ... | 09/21/2004 |
| 6719957 | Process for purification of anhydrous hydrogen chloride gas High boiling contaminants such as chloro-aromatic compounds are removed from a gas by compressing the gas containing the contaminant, cooling the compressed gas to reduce the temperature of the gas to at least 20° C. above the outlet temperature of a second cooling... | 04/13/2004 |
| 6692719 | Process for regeneration of acid halide solutions A process is disclosed for regenerating an aqueous acid halide leachant from a spent aqueous metal halide leach liquor. The process comprises introducing into a fluidized bed or spray roaster a hydrocarbon fuel, an oxygen-enriched oxidizing gas and the aq... | 02/17/2004 |
| 6676917 | Process for the production of hydrochloric acid and neutralized sulfates A process for the production of hydrochloric acid and neutralized sulfates comprising: reacting sulfuric acid with an alkaline metal chloride in order to obtain a liquor containing hydrochloric acid, an acid alkaline metal sulfate and an excess of sulfuri... | 01/13/2004 |
| 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 |
| 6652817 | Apparatus for processing organohalogen compounds An apparatus for processing an organohalogen compounds includes a catalyst container containing a catalyst layer, a supplying path for supplying a carrier gas containing organohalogen compounds and steam through the catalyst container, a cooling chamber a... | 11/25/2003 |
| 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 |
| 6589492 | Process for recovering catalyst components from a mother liquor of liquid phase oxidation A process for recovering components of a catalyst from a mother liquor of liquid phase oxidation in production of aromatic carboxylic acids by liquid phase oxidation of aromatic hydrocarbons having substituents with a gas containing oxygen in a presence o... | 07/08/2003 |
