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| Number | Title | Issue Date |
| 7442352 | Flue gas purification process using a sorbent polymer composite material Process for removing sulfur oxides, mercury vapor, and fine particulate matters from industrial flue gases that contain such pollutants. Pollutants are removed by modules, which contain microporous adsorbent (i.e., sorbent) material held within a polymer matrix. The... | 10/28/2008 |
| 7335340 | Flue gas desulfurization apparatus and flue gas desulfurization system A flue gas desulfurization apparatus includes at least one activated carbon fiber board 20 provided in a catalyst unit 6, the board being formed by alternatingly juxtaposing one or more plate-like activated carbon fiber sheets and one or more corrugate... | 02/26/2008 |
| 7311891 | Process for the recovery of sulfur from Claus tail gas streams Recovering sulfur from a gas stream containing hydrogen sulfide by oxidizing the gas stream to convert the hydrogen sulfide in the gas stream to sulfur oxide, and thus form a sulfur oxide enriched gas stream. The sulfur oxide enriched gas stream is contacted with a ... | 12/25/2007 |
| 7261870 | Process for the reduction of carbon monoxide and carbonyl sulfide emissions Carbon monoxide and carbonyl sulfide emissions are reduced in manufacturing processes, including titanium tetrachloride production processes. Gas is contacted with CO, COS, and an oxygen-containing gas with a suitable catalyst. The catalyst may be a metal oxide cata... | 08/28/2007 |
| 7241430 | Activated carbon for odor control and method for making same An activated carbon-metal oxide matrix is disclosed. The activated carbon-metal oxide matrix may be obtained by a method including the steps of: preoxidizing a carbon material, grinding the preoxidized carbon material; mixing the ground preoxidized material with a m... | 07/10/2007 |
| 7037474 | Use of sulfide-containing liquors for removing mercury from flue gases A method and apparatus for reducing and removing mercury in industrial gases, such as a flue gas, produced by the combustion of fossil fuels, such as coal, adds sulfide ions to the flue gas as it passes through a scrubber. Ideally, the source of these sulfide ions m... | 05/02/2006 |
| 7029639 | Desulfurizer comprising activated carbon and method of desulfurization A desulfurization apparatus for desulfurizing a flue gas containing sulfur oxides through contact with a porous carbon material. The carbon material, which is provided in a desulfurization tower, is at least one species selected from activated carbon and activated c... | 04/18/2006 |
| 6962616 | Preparation of adsorbents from organic fertilizer and mineral oil and their application for removal of acidic gases from sulfur containing wet gas streams A method of making an adsorbent which includes: a) thermally drying dewatered sewage sludge to form granulated organic fertilizer; b) treating the fertilizer with mineral oil; and c) pyrolyzing the treated fertilizer at temperatures between about 600° C. and about ... | 11/08/2005 |
| 6946108 | Flue gas desulfurization apparatus and flue gas desulfurization system, and method for operating flue gas desulfurization apparatus A flue gas desulfurization apparatus includes at least one activated carbon fiber board 20 provided in a catalyst unit 6, the board being formed by alternatingly juxtaposing one or more plate-like activated carbon fiber sheets and one or more corrugate... | 09/20/2005 |
| 6942842 | Process for the desulfurization of CO gas The present invention provides a process for the preparation of carbon monoxide gas (CO gas) that is free of sulfur compounds to the greatest possible extent and a process to use that gas in chemical syntheses, for example, for the synthesis of phosgene from carbon ... | 09/13/2005 |
| 6905534 | Method and apparatus for removing vapor phase contaminants from a flue gas stream The present invention provides a method and apparatus for removing trace contaminants from a gas stream or flue gas. In one embodiment, the present invention an apparatus for removing a trace contaminant from a gas stream, comprising a gas duct configured to receive... | 06/14/2005 |
| 6872373 | Flue gas processing apparatus and desulfurization method A flue gas processing apparatus for removing sulfur oxide contained in a gas, including a desulfurization tower through which the gas flows, the desulfurization tower including a catalyst unit having at least one activated carbon fiber board which adsorbs the sulfur... | 03/29/2005 |
| 6858192 | Activated carbon for odor control and method for making same An activated carbon-metal oxide matrix is disclosed. The activated carbon-metal oxide matrix may by obtained by a method including the steps of: preoxidizing a carbon material, grinding the preoxidized carbon material; mixing the ground preoxidized material with a m... | 02/22/2005 |
| 6814948 | Exhaust gas treating systems An active carbon for use in the treatment of exhaust gas can be obtained by heat-treating a starting active carbon fiber derived from polyacrylonitrile, pitch or the like or a starting particulate active carbon in a non-oxidizing atmosphere. The heat-treating temper... | 11/09/2004 |
| 6555079 | Method and device for cleaning the atmosphere Method for cleaning the atmosphere by adsorbing pollutants, e.g., hydrocarbons, ozone, carbon monoxide, nitrogen oxides, sulfur oxides, etc., contained in the atmosphere. The pollutant-containing atmosphere is contacted with an outer surface of a substrat... | 04/29/2003 |
| 6521200 | Catalyst and process for oxidation of sulphur dioxide A process for the recovery of sulphur trioxide, solutions of sulphuric acid, or organic derivatives thereof, using organic compounds and/or supercritical fluids, and catalyst. The process comprises the steps of passing a mixture of SO2 and an o... | 02/18/2003 |
| 6114273 | Method for sox removal by catalytic carbon An improved process is provided for the removal of sulfur oxides from gas or vapor media containing oxygen and H2 O by contacting the media with a catalytically-active carbonaceous char. The improvement is provided by the use of a catalytically... | 09/05/2000 |
| 6103205 | Simultaneous mercury, SO2, and NOx control by adsorption on activated carbon Regenerative adsorption of mercury on activated carbons derived from scrap tires enables the removal and recovery of mercury from combustion/incineration flue gas, with concurrent control of SO2 and NOx. Flue gas is used for regenera... | 08/15/2000 |
| 6086842 | Recycling of sodium hydroxide and production of gypsum from dry flue gas desulfurization The present invention is directed towards a system that makes high quality gypsum from a dry flue gas desulfurization process which utilizes a low temperature regeneration of the carbon adsorbent in the flue gas process. The high quality gypsum is easily ... | 07/11/2000 |
| 6033638 | Sequential adsorptive capture and catalytic oxidation of volatile organic compounds in a reactor bed A method for adsorbing and oxidizing VOC's in the same bed, thus reducing the size of or even eliminating the need for a catalytic or thermal oxidation unit at the end of the system. In this system, a catalyst is intimately interspersed with the adsorbent... | 03/07/2000 |
| 5908652 | Method for modifying aroma-containing gas A method for modifying an aroma-containing gas comprising volatile components recovered from coffee, characterized by contacting the aroma-containing gas with molecule sieve carbon oxidized with a strong acid is disclosed. This method removes undesirable ... | 06/01/1999 |
| 5733515 | Purification of air in enclosed spaces The present invention discloses an improved method for filtration of air within enclosed spaces. Improvement is achieved by the use of a high-temperature carbonaceous char that is catalytically active for the removal of certain undesirable constituents fr... | 03/31/1998 |
| 5700436 | Purification of air in enclosed spaces The present invention discloses an improved method for filtration of air within enclosed spaces. Improvement is achieved by the use of a high-temperature carbonaceous char that is catalytically active for the removal of certain undesirable constituents fr... | 12/23/1997 |
| 5462693 | Air purifying agent and a process for producing same An air purifying agent comprising a carrier which contains short pulp fiber, on which one or more chemical components selected from the group consisting of acids, alkalis, oxidizing agents, reducing agents and antimicrobial components are supported. Accor... | 10/31/1995 |
| 5456891 | Process for the purification of contaminated exhaust gases from incineration plants A process, using regenerable adsorption materials, for purifying exhaust gases that have been contaminated with at least SO2, a heavy metal such as mercury and additional toxic gases such as dioxins and furans is disclosed. The process includes... | 10/10/1995 |
| 5405593 | Leonardite char adsorbents A method of removing polluting noxious substances from a flow of flue-gas including sulfur dioxide, nitric oxides and heavy metals is disclosed. The method consists of passing the flue-gas material through sized-reduced leonardite to assure that it will h... | 04/11/1995 |
| 5403548 | Activated carbon adsorbent and applications thereof An alkali metal iodide and phosphoric acid are homogeneously supported on an activated carbon honeycomb, in respective amounts of 0.015 to 1.5 mg atoms as iodine and 1.4 to 7.0 mg equivalents per gram of activated carbon. The alkali metal iodide is potass... | 04/04/1995 |
| 5346876 | Air purifying agent and a process for producing same An air purifying agent comprising a carbonaceous carrier and activated manganese dioxide and iodate supported thereon. According to the present invention, there can be provided an air purifying agent which is safe to handle and exhibits sufficient effect ... | 09/13/1994 |
| 5344631 | Process for the separation of undesirable constituents from a waste gas Process for adsorbing undesirable constituents from a waste gas by feeding the waste gas through at least one reaction chamber filled with lumpy or granular adsorbent, and through at least one adsorption layer. The adsorbent is introduced into the reactio... | 09/06/1994 |
| 5320992 | Disposable oxide carrier for scavenging hydrogen sulfide A mineral carrier for those iron oxides which react to remove hydrogen sulfide and mercaptans from fluid streams. The new carrier avoids the problem encountered with wood chip beds of bed solidification which occurs when reacted oxide particles adhere to ... | 06/14/1994 |
| 5294420 | Process for the desulfurization and denitrification of a waste gas containing halogen-containing materials A stable processing of a waste gas containing halogen-containing materials is rendered possible without fear of increase of the pressure loss or clogging of a louver unit near the waste gas inlet in a second moving bed due to accumulation of the halogen c... | 03/15/1994 |
| 5270279 | Production process of formed activated coke for SOx and NOx removal having high NOx-removing ability This invention relates to a production process of formed activated coke for SOx and NOx removal which is employed in treatment systems for various flue gases and the like. The formed activated coke for SOx and NOx removal obtained in accordance with the p... | 12/14/1993 |
| 5264194 | Restoring reactivity of gas sweetening oxide beds Non-hydrated iron oxides utilized in moistened permeable beds to react hydrogen sulfide present in natural gas do not totally lose their reactivity when the beds give up their moisture to dry gas. Lessening of their reactivity attendant to dryness is sign... | 11/23/1993 |
| 5256384 | Activated carbon process for removing hydrogen sulfide from gases To a gas which contains H2 S and water vapor and which is to be desulfurized oxygen is added at such a rate that the gas contains 1 to 20 moles O2 per mole of H2 S. At a temperature in the range of 50° to 180° C. the gas... | 10/26/1993 |
| 5116588 | Process for reduction of sulfur emission during sintering processes In a process for reduction of pollutant emissions during thermal processes, particularly sintering processes, in which a combustible mixture, particularly a coke bed, is ignited, the fuel-containing mixture, particularly the coke is rolled with Ca(oH) | 05/26/1992 |
| 5116585 | Process for purification of offgases The invention relates to a process for the removal of acidic gaseous compounds from a stream of offgas by introducing into the gastream a core-gas containing solid particles with a diameter of between about 40 and 1000 Å and treatment of the obtained gas... | 05/26/1992 |
| 5114689 | Integrated process for the removal of sulfur compounds from fluid streams The present invention relates to a new and integrated process involving the utilization of a primary adsorption bed containing a regenerable, physical adsorbent and an auxiliary sorption bed containing a chemisorbent for the removal of sulfur compounds fr... | 05/19/1992 |
| 5112588 | Method of and apparatus for the removal of gaseous contaminants from flue gas or reduction of the content of gaseous contaminants in a flue gas Gaseous contaminants, especially sulfur dioxide, sulfur trioxide, hydrogen chloride or hydrogen fluoride are removed from flue gases by chemisorption. A solid finely divided sorbent, before being brought into contact with the flue gas, is treated in a rea... | 05/12/1992 |
| 5096635 | Method of tempering carboniferous blanks in an autoclave Cold carbon-containing blanks which are impregnated with a carbon-containing material are introduced into a cold autoclave which is thereupon sealed and filled with inert gas prior to heating of the interior of the autoclave to tempering temperature. The ... | 03/17/1992 |
| 5039507 | Method for the continuous reduction of sulphur dioxide-containing gases using coal or carbon A method for the continuous reduction of sulphur dioxide-containing gases essentially free of molecular oxygen, using coal or carbon, which comprises introducing the sulphur dioxide-containing gases into a coal-filled or carbon-filled reactor divided into... | 08/13/1991 |
