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| Number | Title | Issue Date |
| 8142748 | Catalyst composition useful in the catalytic reduction of sulfur compound contained in a gas stream and a method of making and using such composition Disclosed is a composition useful in the hydrolysis of sulfur compounds that are contained in a gas stream. The composition comprises alumina, a group VI metal component and a group VIII metal component. The composition has a pore structure such that a large percent... | 03/27/2012 |
| 7998447 | Method for removing hydrogen sulfide from an emissions stream A method of removing hydrogen sulfide from an emissions stream is disclosed, wherein the method includes directing the emissions stream into a hydrogen sulfide converter having a metal oxide catalyst, adsorbing the hydrogen sulfide in the emissions stream to the met... | 08/16/2011 |
| 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 |
| 7431904 | Catalyst support material, catalysts prepared therefrom and process for the treatment of a flue gas The present invention relates to a catalyst support material and catalysts made therefrom having improved resistance towards erosion. The catalyst support contains at least 20% by weight of TiO2 being present mainly in the anatase form. Furthermore... | 10/07/2008 |
| 7427385 | Systems and processes for reducing the sulfur content of hydrocarbon streams Systems and processes for removing a first sulfur compound from a hydrocarbon stream. The systems and process utilize at least one reaction vessel incorporating a hydrolysis catalyst suitable for hydrolyzing the first sulfur compound to a second sulfur compound. The... | 09/23/2008 |
| 7417005 | Process for making, and use of, anionic clay materials Anionic clay compounds such as hydrotalcite-like compounds can be made by a process wherein a non-hydrotalcite-like compound (or a hydrotalcite-like compound) are heat treated and then hydrated to form hydrotalcite-like compounds having properties (e.g., increased h... | 08/26/2008 |
| 7354560 | Process for the production of hydrogen Process for the removal of organic and/or inorganic sulfur from an ammonia stream by passing said stream through a fixed bed of sulfur absorbent in a sulfur absorber and withdrawing a sulfur-free ammonia stream, wherein said sulfur absorbent is a catalyst having a t... | 04/08/2008 |
| 7323152 | Catalyst or sorbent beds A fixed bed containing a particulate catalyst or sorbent material (10) subject to operation at high temperature having a shaped boundary member (16) inclined to the direction of fluid flow through the bed that maintains the depth of said catalyst or so... | 01/29/2008 |
| 7323151 | Process for the selective removal of sulphur compounds from synthesis gas A process for the selective removal of sulphur compounds from synthesis gas being rich in carbon monoxide and containing hydrogen, carbon monoxide and containing hydrogen, carbon dioxide and steam comprising contacting the synthesis gas at a maximum contact temperat... | 01/29/2008 |
| 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 |
| 7270798 | Noble metal-free nickel catalyst formulations for hydrogen generation The invention relates to methods of using noble metal-free nickel catalysts to generate a hydrogen-rich gas from gas mixtures containing carbon monoxide and water, such as water-containing syngas mixtures, where the nickel may exist in either a supported or a bulk s... | 09/18/2007 |
| 7261868 | Process and apparatus for the decomposition of fluorine compounds Fluorine compounds such as C2F6, CF4, CHF3, SF6 and NF3, are made to contact with a fluorine compound decomposition catalyst and a catalyst for the decomposition of at least one of CO, SO2F... | 08/28/2007 |
| 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 |
| 7175821 | Reactor and process for reducing emissions of CO and NO The current invention provides systems and method for reducing emissions of gaseous pollutants such as carbon monoxide, nitric oxide and nitrogen dioxide. The invention utilizes at least one catalyst bed and at least one fluidizable bed of sorbent material. The curr... | 02/13/2007 |
| 7153345 | Sulfur oxide adsorbents and emissions control High capacity sulfur oxide absorbents utilizing manganese-based octahedral molecular sieve (Mn—OMS) materials are disclosed. An emissions reduction system for a combustion exhaust includes a scrubber 24 containing these high capacity sulfur oxide absorbents... | 12/26/2006 |
| 7112313 | Process for making, and use of, anionic clay materials Anionic clay compounds such as hydrotalcite-like compounds can be made by a process wherein a non-hydrotalcite-like compound (or a hydrotalcite-like compound) are heat treated and then hydrated to form hydrotalcite-like compounds having properties (e.g., increased h... | 09/26/2006 |
| 7074375 | Method of desulfurizing a hydrocarbon gas by selective partial oxidation and adsorption A hydrocarbon gas such as methane and LPG is desulfurized in the presence of oxygen and an oxidation catalyst to convert sulfur compounds in the gas to sulfur oxides. The sulfur oxides are then trapped downstream of the oxidation by an adsorbent. The amount of oxyge... | 07/11/2006 |
| 7060233 | Process for the simultaneous removal of sulfur and mercury A process for removing hydrogen sulfide, other sulfur-containing compounds and/or sulfur and mercury from a gas stream contaminated with mercury, hydrogen sulfide or both. The method comprises the step of selective oxidation of hydrogen sulfide (H2S) in a... | 06/13/2006 |
| 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 |
| 6962683 | Method of removing and recovering elemental sulfur from highly reducing gas streams containing sulfur gases A method is provided for removal of sulfur gases and recovery of elemental sulfur from sulfur gas containing supply streams, such as syngas or coal gas, by contacting the supply stream with a catalyst, that is either an activated carbon or an oxide based catalyst, a... | 11/08/2005 |
| 6942841 | Process for treating fluorine compound-containing gas A gas stream containing at least one fluorine compound selected from the group consisting of compounds of carbon and fluorine, compounds of carbon, hydrogen and fluorine, compounds of sulfur and fluorine, compounds of nitrogen and fluorine and compounds of carbon, h... | 09/13/2005 |
| 6923945 | Layered SOX tolerant NOX trap catalysts and methods of making and using the same The present invention relates to a layered catalyst composite useful for reducing contaminants in exhaust gas streams, especially gaseous streams containing sulfur oxide contaminants. More specifically, the present invention is concerned with improved catalysts of t... | 08/02/2005 |
| 6896858 | Gas refining system A gas refining method for adsorbing a reducing gas obtained by pressure gasification of coal or oil comprises introducing a reducing gas stream into an adsorbing and removing zone where it contacts an adsorbent. Sulfur-containing compounds are adsorbed onto the adso... | 05/24/2005 |
| 6855305 | Process for treating fluorine compound-containing gas A gas stream containing at least one fluorine compound selected from the group consisting of compounds of carbon and fluorine, compounds of carbon, hydrogen and fluorine, compounds of sulfur and fluorine, compounds of nitrogen and fluorine and compounds of carbon, h... | 02/15/2005 |
| 6790422 | Catalytic treatment of gaseous effluents containing varying amounts of sulfur compounds Active alumina catalysts, well suited for the Claus reaction, for the hydrolysis of organosulfur compounds and for catalytically removing objectionable sulfur compounds from gaseous effluents comprised thereof, contain a cocatalytically effective amount of sodium va... | 09/14/2004 |
| 6759020 | Spark-ignited internal combustion engine oxide gas absorbing arrangement and method In the embodiments described in the specification, a spark-ignited internal combustion engine has an exhaust line containing an oxide gas absorber for absorbing NOx and SOx and desorbing NOx and SOx at elevated temperature... | 07/06/2004 |
| 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 |
| 6685898 | Hydrophobic catalytic materials and method of forming the same A catalytic composition and method of making the same in which a catalytic material has an average pore size distribution sufficiently large to substantially prevent capillary condensation.... | 02/03/2004 |
| 6667017 | Process for removing environmentally harmful compounds A process for oxidizing environmentally harmful compounds which participate in atmospheric photochemical reactions to produce for example ozone and undesirable smog constituents from a fluid, in particular a gas, volatile organic compounds (VOC) including... | 12/23/2003 |
| 6610264 | Process and system for desulfurizing a gas stream A process and system is disclosed for removing sulfur from tail-gas emitted from a Claus sulfur recovery process. First, the tail-gas is oxidized so as to convert sulfur therein to sulfur oxides. Oxidized tail-gas is directed into an absorber where a soli... | 08/26/2003 |
| 6607704 | Sulfur tolerant lean NOx trap An integrated lean NOx trap. The integrated lean NOx trap includes a lean NOx trap containing a composite metal oxide mixture consisting essentially of about 80-100 wt % stoichiometric spinel MgAl2 O4... | 08/19/2003 |
| 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 |
| 6482377 | Method for bypassing sulfur dioxide around an aftertreatment device in an exhaust gas aftertreatment system A method of treating exhaust from an internal combustion engine having an emission reduction device, such as a lean NOx trap. Exhaust from the engine is directed to a first sulfur trap, which treats the exhaust and discharges exhaust that is substantially... | 11/19/2002 |
| 6306793 | Metal sulfide initiators for metal oxide sorbent regeneration A process of regenerating a sulfided sorbent is provided. According to the process of the invention, a substantial portion of the energy necessary to initiate the regeneration reaction is provided by the combustion of a particulate metal sulfide additive.... | 10/23/2001 |
| 6297189 | Sulfide catalysts for reducing SO2 to elemental sulfur A highly efficient sulfide catalyst for reducing sulfur dioxide to elemental sulfur, which maximizes the selectivity of elemental sulfur over byproducts and has a high conversion efficiency. Various feed stream contaminants, such as water vapor are well t... | 10/02/2001 |
| 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 |
| 6274109 | Conversion process for carbonyl sulfide and/or hydrogen cyanide contained in mixed gas Carbonyl sulfide and/or hydrogen cyanide contained in a mixed gas are/is converted by contacting the mixed gas with an alkalized chromium oxide-aluminum oxide catalyst in the presence of steam, wherein the mixed gas and the steam at a volume ratio of 0.05... | 08/14/2001 |
| 6274106 | Oxide gas absorbing arrangement and method In the oxide gas absorbing arrangement disclosed in the specification, metal foils having a thickness ࣘ0.05 mm are coated with an oxide gas absorbing layer containing gamma aluminum oxide. One metal foil is corrugated and joined to a smooth foil and the... | 08/14/2001 |
| 6267941 | Catalyst system for deodorization of a mixture of sulfur compounds and compounds such as aldehydes, alcohols and/or hydrocarbons A catalyst system for deodorization and an apparatus for deodorization, each of which comprises a pretreating catalyst and a noble metal catalyst, the pretreating catalyst converting a sulfur atom of low oxidation state which deactivates the noble metal c... | 07/31/2001 |
