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| Number | Title | Issue Date |
| 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 |
| 7235223 | Method for operating a flue gas purification plant In a method for operating a flue gas purification plant (10) including a plurality of parallel of absorber chambers (11), in which in each absorber chamber (11), CO and NO are simultaneously oxidized by a catalyst in a first absorber (15)... | 06/26/2007 |
| 7186328 | Process for the regeneration of an adsorbent bed containing sulfur oxidated compounds A process for the cyclical regeneration of an adsorbent bed containing sulfur-oxidated compounds. The adsorbent bed is used to adsorb and separate sulfur-oxidated compounds from a hydrocarbonaceous stream to produce an adsorbent having adsorbed sulfur-oxidated compo... | 03/06/2007 |
| 7148389 | Selective sorbents for purification of hydrocartons A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, ther... | 12/12/2006 |
| 7094333 | Selective sorbents for purification of hydrocarbons A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, ther... | 08/22/2006 |
| 7053256 | Selective sorbents for purification of hydrocarbons A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, ther... | 05/30/2006 |
| 7029574 | Selective sorbents for purification of hydrocarbons A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, ther... | 04/18/2006 |
| 6998100 | Sulfur oxide sorption with layered chlorite-type contact solids Chlorite-like phyllosilicate materials are found useful as SOx sorbents. A novel process of sulfur oxide sorption is provided utilizing these layered materials as contact solids. Typical industrial applications include sulfur removal from fluid catalyst c... | 02/14/2006 |
| 6974494 | Apparatus and method using an electrified filter bed for removal of pollutants from a flue gas stream Pollutants in a flue gas stream from a dryer of products, such as wood chips, are removed by a pollution abatement system that includes an electrified filter bed unit for removing solid particulates. To prevent deteriorated operation of the electrified filter bed un... | 12/13/2005 |
| 6875410 | Adsorbent for removing sulfur compounds from fuel gases and removal method An adsorbent for removing sulfur compounds from sulfur compounds-containing fuel gas contains a zeolite ion-exchanged with Ag and has an excellent performance when used to remove sulfur compounds from the fuel gas, irrespective of the moisture concentration in the f... | 04/05/2005 |
| 6699448 | SOx tolerant NOx trap catalysts and methods of making and using the same The present invention relates to sulfur tolerant catalyst composites useful for reducing contaminants in exhaust gas streams, especially gaseous streams containing sulfur oxide contaminants. More specifically, the present invention is concerned with impro... | 03/02/2004 |
| 6585945 | SOx tolerant NOx trap catalysts and methods of making and using the same The present invention relates to sulfur tolerant catalyst composites useful for reducing contaminants in exhaust gas streams, especially gaseous streams containing sulfur oxide contaminants. More specifically, the present invention is concerned with impro... | 07/01/2003 |
| 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 |
| 6281164 | SOx additive systems based upon use of multiple particle species The useful life of SOx additives having a SO2.fwdarw.SO.sub.3 oxidation catalyst component and a SO3 absorption component can be extended by employing each of these components as separate and distinct physical particles, p... | 08/28/2001 |
| 6083473 | Selective oxidation catalyst, preparation and use thereof A catalyst for selective oxidation of sulfur-containing compounds comprising a metal of Group VIIIA which forms an active metal oxide supported on a support comprising a laminar phyllosilicate, alone, or in combination with silica or alumina. Laminar phyl... | 07/04/2000 |
| 6074984 | SOx Additive systems based upon use of multiple particle species The useful life of SOX additives having a SO2 .fwdarw.SO3 oxidation catalyst component and a SO3 absorption component can be extended by employing each of these components as separate and distinct physical parti... | 06/13/2000 |
| 6048821 | SOx additive systems based upon use of multiple particle species The useful life of SOX additives having a SO2 .fwdarw.SO3 oxidation catalyst component and a SO3 absorption component can be extended by employing each of these components as separate and distinct physical parti... | 04/11/2000 |
| 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 |
| 5948382 | Selective oxidation of hydrogen sulfide in the presence of mixed-oxide catalyst containing iron, molybdenum and antimony The present invention discloses a method of selectively oxidizing hydrogen sulfide to elemental sulfur, in which a H2 S-containing gas mixture contacts with an oxygen-containing gas at about 50-400° C. in the presence of an mixed-oxide catalys... | 09/07/1999 |
| 5520898 | Method for the preparation of highly reactive clay composites for the removal of sox from flue gas streams The use of base/clay composites materials as sorbents for the removal of SO2 and SO3 (SOx) from flue gas and other sulfur containing gas streams is described. The base is either an alkaline earth metal carbonate (eg. CaCO | 05/28/1996 |
| 5512260 | Reduction of sulfur content in a gaseous stream A process for reducing sulfur content in a gaseous stream with the production of elemental sulfur by first treating the gaseous steam with hydrogenation and hydrolysis to convert substantially all of the sulfur components therein to hydrogen sulfide. Then... | 04/30/1996 |
| 5422332 | Processes for reacting bastnaesite with metal oxides Bastnaesite materials and Mg[A] (and/or Al[B]) materials can be chemically reacted by use of reactions wherein a Al[B] ingredient such as alumina is made into a sol by use of a mono-protonic acid before Mg[A] (and/or Al[B]) materials is (are) reacted with... | 06/06/1995 |
| 5334564 | Method for the preparation of highly reactive clay composites for the removal of SOx from flue gas streams The use of base/clay composites materials as sorbents for the removal of SO2 and SO3 (SOx) from flue gas and other sulfur containing gas streams is described. The base is either an alkaline earth metal carbonate (eg. CaCO | 08/02/1994 |
| 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 |
| 5002742 | Inorganic oxide sorbents for sulfur oxides Alkali metal and alkaline earth metal containing silica alumina spinel-mullite-gamma alumina sorbents which may be used to remove sulfur oxides (SOx components) from gas streams.... | 03/26/1991 |
| 4999175 | Process for selective adsorption of sulfur compounds from gaseous mixtures containing mercaptans A process for separating sulfur-containing compounds other than mercaptans from gaseous streams. A gaseous stream including mercaptans and other sulfur-containing compounds is brought into contact with a solid supporting material coated with a thin layer ... | 03/12/1991 |
| 4952382 | Process for removing sulfur oxides with an absorbent which contain an anionic clay Disclosed are hydrocarbon conversion catalyst compositions, such as fluidizable cracking catalyst compositions, containing an anionic clay, e.g. a clay having a hydrotalcite, and ettringite or a hydrocalumite structure, for the conversion of sulphur-conta... | 08/28/1990 |
| 4940569 | Sorbent and processes for removing nitrogen oxides, sulfur oxides and hydrogen sulfide from gas streams Novel sorbents comprising (a) an alumina substrate having a pore volume between 0.4 and 0.8 cc/g, and (b) an alkali or alkaline earth component, for example, sodium carbonate, wherein the amount of the alkali or alkaline earth component is between 50 and ... | 07/10/1990 |
| 4836993 | Process for removing sulfur oxides from a gas Sulfur oxides are removed from a gas by an absorbent which comprises an inorganic oxide composition in association with at least one free or combined rare earth metal selected from the group consisting of lanthanum, cerium, praseodymium, samarium and dysp... | 06/06/1989 |
| 4830733 | 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... | 05/16/1989 |
| 4804521 | Process for removing sulfur from sulfur-containing gases The present disclosure relates to improved processes for treating hot sulfur-containing flue gas to remove sulfur therefrom. Processes in accorda The government may own certain rights in the present invention pursuant to EPA Cooperative Agreement CR 81-15... | 02/14/1989 |
| 4798711 | Processes for removing nitrogen oxides, sulfur oxides and hydrogen sulfide from gas streams Novel sorbents comprising (a) an alumina substrate having a pore volume between 0.4 and 0.8 cc/g, and (b) an alkali or alkaline earth component, for example, sodium carbonate, wherein the amount of the alkali or alkaline earth component is between 50 and ... | 01/17/1989 |
| 4793981 | Integrated injection and bag filter house system for SOx -NOx -particulate control with reagent/catalyst regeneration A process of controlling emission of SOx, NOx and particulates from a coal-fired boiler system is disclosed. A reagent/catalyst in powdered form is added into the combustion flue gas stream intermediate the boiler and economizer at a... | 12/27/1988 |
| 4789532 | Method for cleaning of a hot flue gas stream from waste incineration In a method for cleaning of flue gas derived from waste incineration, of the kind which comprises spray drying a lime slurry in the hot flue gas, the amount of active lime used is from 1.5 to 2.5 times larger than the amount reacting with the acidic compo... | 12/06/1988 |
| 4764355 | Process for removal of solid and gaseous noxious matter from hot gases Metal candle-type gap filters are used to remove particles from a hot gas stream containing sulfur oxides so that, in the filter cake which is built up upon the candle filters, the sorption reaction can continue as the hot gas stream passes through the fi... | 08/16/1988 |
| 4744967 | Process for the purification of exhaust gases containing oxides of nitrogen and sulfur A process is described for the purification of exhaust gases containing oxides of nitrogen and sulfur obtained from combustion installations and industrial production processes by selective catalytic reduction of the nitric oxides with ammonia, subsequent... | 05/17/1988 |
| 4725417 | Process for removing sulfur oxides from a gas by means of an absorption mass regenerable by reaction with hydrogen sulfide The invention concerns a process for removing sulfur oxides and particularly sulfur dioxide contained in such gases as industrial fumes, wherein said gas is contacted with a solid absorbent containing magnesium oxide and at least one group VIII noble meta... | 02/16/1988 |
| 4710363 | Process of removing SOx and NOx from waste gases In a process for removing SOx and NOx from waste gases, SOx will quasi-completely be removed from the waste gases either in a first single step or in several steps, and this preferably by means of adsorption cokes (activat... | 12/01/1987 |
| 4692318 | Process for simultaneously removing nitrogen oxides, sulfur oxides, and particulates A process is provided in which particulates, nitrogen oxides, and sulfur oxides are simultaneously removed from flue gases in a granular bed filter and scrubber with a nitrogen oxide-capturing reducing agent and a bed of sulfur oxide-capturing and particu... | 09/08/1987 |
| 4668491 | Process for the selective hydrolysis of inorganic sulfur compounds Process and catalyst for the selective catalytic hydrolysis of the inorganic sulfur compounds COS and/or CS2 being present in CO containing process gases. The process gas is passed over an alkalized chromium oxide-aluminum oxide catalyst in the... | 05/26/1987 |
