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| Number | Title | Issue Date |
| 8128898 | Removal of hydrogen cyanide from synthesis gas A process (10) for at least partially removing hydrogen cyanide from synthesis gas includes feeding a synthesis gas (30) containing hydrogen cyanide to a gas-liquid contacting stage (18) and, in the gas-liquid contacting stage (18), conta... | 03/06/2012 |
| 7431907 | Apparatus for removing vaporized unreacted isocyanate from a gaseous waste stream An apparatus includes a container that defines an interior. The interior is isolated from ambient atmosphere for receiving a composition that includes isocyanate. A conduit extends into the container and defines a channel therethrough. An interior of the container i... | 10/07/2008 |
| 7429366 | Catalyst and process for decomposing carbonyl sulfide and hydrogen cyanide A solution of a chromium compound is impregnated into a silica-alumina carrier made of alumina and containing 1 to 5 weight % of silica relative to the weight of the carrier, thereby to obtain a decomposing catalyst carrying 10 to 15 weight % of chromium oxide relat... | 09/30/2008 |
| 7387768 | Method for purifying gases The invention relates to the use of an absorption liquid for purifying gases from gaseous acidic contaminants, the absorption liquid comprising A) 0.1 to 100% by weight of one or more amines of the formula I ... | 06/17/2008 |
| 7374734 | Absorbing agent and method for eliminating acid gases from fluids The disclosure relates to an absorbent for removing acid gases from fluids. The absorbent contains at least one tertiary amine, an amine which is selected from hydroxyethylpiperazine, bis(hydroxyethylpiperazine) or a mixture of these and piperazine. The absorbent ma... | 05/20/2008 |
| 7374737 | Use of a tiOcomposition as catalyst for hydrolyzing COS and/or HCN The invention concerns the use of a composition based on TiO2 as a catalyst for hydrolyzing COS and/or HCN in a gas mixture, said composition comprising at least 1% by weight of at least one sulphate of an alkaline-earth metal selected from calcium, bariu... | 05/20/2008 |
| 7371706 | Catalyst for removing hydrocarbons from exhaust gas and method for purification of exhaust gas A catalyst for removing hydrocarbons from exhaust gas containing methane and an excess of oxygen, which comprises palladium or palladium/platinum supported on at least one carrier selected from zirconia, sulfated zirconia and tungsten-zirconia, and a method for trea... | 05/13/2008 |
| 7304011 | Compositions and processes for reducing NOemissions during fluid catalytic cracking Compositions for reduction of NOx generated during a catalytic cracking process, preferably, a fluid catalytic cracking process, are disclosed. The compositions comprise a fluid catalytic cracking catalyst composition, preferably containing a Y-type zeoli... | 12/04/2007 |
| 7132086 | Environmental control system including vapor cycle system and isothermal CATOX/PTF An environmental control system includes a catalytic reactor and a post treatment filter for cleaning incoming air, and a vapor cycle system for conditioning the air. ... | 11/07/2006 |
| 7090818 | Carbon disulfide process The specification discloses a process for the manufacture of carbon disulfide from sulfur dioxide and carbon monoxide comprising two catalytic reactions. In the first reaction, sulfur dioxide and carbon monoxide are converted to carbonyl sulfide and carbon dioxide. ... | 08/15/2006 |
| 7084086 | Catalyst for purifying exhaust gases A catalyst for purifying exhaust gases exhibits not only effective purifying characteristics even in a low temperature range such as immediately after an engine starts but also high exhaust gas purifying ability. In the catalyst for purifying exhaust gases of a firs... | 08/01/2006 |
| 7070746 | Process for nitrous oxide purification A method for purification of an oxygen contaminated nitrous oxide gas by feeding the nitrous oxide gas and a reducing agent such as hydrogen, carbon monoxide or ammonia into a de-oxidation reactor, performing de-oxidation by reacting the reducing agent with oxygen u... | 07/04/2006 |
| 7060230 | Apparatus for treatment of waste gas An apparatus for the treatment of a waste gas that is capable of recovering the heat generated by the catalytic oxidation of a waste gas to the largest possible extent and allowing the temperature of the treated gas in a first waste gas pre-heater to be adjusted to ... | 06/13/2006 |
| 7014692 | Scrubber A scrubber for eliminating NO from air flowing through the scrubber, comprising a housing (1) having at least one inlet hole (2) and an outlet hole (4) and which is comprising filtering material (6). A second outlet hole (9) is pro... | 03/21/2006 |
| 6998098 | Removal of gases from a feed A process is presented for separating and removing acid gases or base gases from a feed gas by use of a gas permeable membrane and a permeate comprising a treatment solution. The treatment solution in the permeate is caustic or acidic and reacts with the base or aci... | 02/14/2006 |
| 6956063 | Method for reducing water concentration in a multi-phase column reactor The present invention relates to a method and apparatus for water removal in multi-phase reactors operating at Fischer-Tropsch conditions. In a preferred embodiment of the present invention, a method of reducing the concentration of water in a multi-phase reactor fo... | 10/18/2005 |
| 6953558 | Process for reducing nitrogen oxide emissions A non-catalytic process for reducing nitrogen oxide (NOx) emissions in the combustion effluent of a stationary combustion apparatus is provided comprising contacting, in the combustion zone of the combustion apparatus, an effective amount of at least one ... | 10/11/2005 |
| 6872296 | Method for removing ammonia from a gas comprising hydrogen cyanide, ammonia and water A method for removing ammonia from a gas comprising HCN, ammonia and water, by first contacting the gas with aqueous ammonium phosphate to remove ammonia from the gas, and then passing the resulting ammonium phosphate solution through an electrolyzer to convert oxal... | 03/29/2005 |
| 6399036 | Use of solid hydroxides as scavenging materials for cyanide gas The present invention relates generally to the use of a combination of alkali metal hydroxides and alkaline-earth metal hydroxides as a scavenging material for cyanide gas. In particular, the present invention relates to a method and means for either filt... | 06/04/2002 |
| 6277345 | Process for the purification of gases The present invention relates to the use of an absorption liquid for purifying a gas by removal of gaseous, acidic impurities. The gas to be purified can be any gas, such as synthesis gas or natural gas, which contains gaseous, acidic impurities such as C... | 08/21/2001 |
| 6277344 | Simultaneous use of peroxygen and olefin compound in odor reduction Disclosed is a process for the treatment of a plant fluid effluent containing odor compounds including an alkyl mercaptan or an alkyl thiol, an amine compound, ammonia, hydrogen sulfide and mixtures thereof by contacting the plant effluent in either a cou... | 08/21/2001 |
| 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 |
| 6214304 | Method of removing mercury from a mercury-containing flue gas A method of removing mercury from a mercury-containing flue gas, especially flue gas from a refuse incinerator, is provided. The mercury-containing flue gas may also contain dust, further heavy metals, and further gaseous noxious gas components. The mercu... | 04/10/2001 |
| 6187275 | Recovery of AlF3 from spent potliner A method of recovering AlF3 from spent potliner using an acid digest to form gaseous HF which is converted to hydrofluoric acid and reacted with alumina trihydrate to form AlF3.... | 02/13/2001 |
| 6123908 | Method of treating spent potliner material from aluminum reduction cells A process of treating spent potliner material from aluminum reduction cells and recovering useful products. In the process of the present invention, spent potliner material is introduced into an acid digester containing, for example, sulfuric acid. As a r... | 09/26/2000 |
| 6120784 | Anti-bacterial/anti-viral coatings, coating process and parameters thereof The invention relates to a method of imparting anti-pathogenic properties to a substrate material comprising: (a) preparing a coating composition containing an anti-pathogenic agent consisting essentially of PVP-I and N-9 in a ratio of from about 100:0 to... | 09/19/2000 |
| 6113871 | Catalytic decomposition of ammonia and hydrogen cyanide in coke-oven gas A supported metal oxide catalyst for the decomposition of ammonia and hydrogen cyanide in coke-oven gas is free of noble metals and comprises, based on the total catalyst, from 2 to 5.5% by weight of NiO and from 0.5 to 3.5% by weight of CoO on an MgO sup... | 09/05/2000 |
| 6107353 | Cyanide and ammonia removal from synthesis gas Cyanide and ammonia are removed from a gas, such as a synthesis gas, by catalytically hydrolyzing cyanide in the gas to ammonia, water scrubbing the hydrolyzed gas to dissolve ammonia and at least a portion of remaining cyanide, and optionally, contacting... | 08/22/2000 |
| 6106792 | Apparatus and method for cleaning gas A method and apparatus for removing TDI from a gas in which the gas containing the TDI is forced through a scrubber tank. A first water spray is in fluid communication with the gas flowing through an inlet pipe and initially reacts the TDI in the gas with... | 08/22/2000 |
| 6063349 | Removal of hydrogen cyanide from synthesis gas The HCN concentration of HCN containing synthesis gas streams is reduced by treatment with a Group IVA metal oxide and optionally containing a Group IIB, Group VA, or Group VIA metal or metals, at reaction conditions preferably suppressing Fischer-Tropsch... | 05/16/2000 |
| 6051040 | Method for reducing emissions of NOx and particulates from a diesel engine A method improves the operation of a diesel engine through the use of a fuel additive, a diesel particulate trap and a NOx -reducing catalyst. The operation of the NOx -reducing catalyst is enhanced by the introduction of urea or lik... | 04/18/2000 |
| 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 |
| 5993763 | Catalyst and process for decomposing HCN in gases A catalyst based on titanium oxide, zirconium oxide or combinations thereof for decomposing HCN in gases, which additionally comprises: molybdenum, vanadium, tungsten, manganese, silicon, selenium, tellurium, niobium, tantalum, sulfur, phosphorus in the form o... | 11/30/1999 |
| 5968465 | Process for removal of HCN from synthesis gas Hydrogen cyanide is removed from an HCN containing gas, e.g., a gas containing CO+H2, by contact with a metal oxide catalyst comprised of the oxides of molybdenum, titanium, and aluminum in the presence of water vapor, and subsequently water wa... | 10/19/1999 |
| 5955042 | Method of treating spent potliner material from aluminum reduction cells A process for treating spent potliner material from aluminum reduction cells and recovering useful products. In the process, spent potliner material is introduced into an acid digester containing, for example, sulfuric acid. A gas component is produced wh... | 09/21/1999 |
| 5948378 | Removal of ammonia and cyanide from synthesis gas with water production A process for producing and cleaning a synthesis gas which contains ammonia and hydrogen cyanide catalytically converts most of the cyanide to ammonia which, along with some of the cyanide, is removed from the gas with water to form aqueous solutions of a... | 09/07/1999 |
| 5929126 | Gas conversion with rejuvenation ammonia removal A gas conversion process includes producing a synthesis gas which contains ammonia and hydrogen cyanide and forms hydrocarbons by reacting the hydrogen and carbon monoxide in the gas in the presence of a hydrocarbon synthesis catalyst also reversibly deac... | 07/27/1999 |
| 5925326 | Process for the production of high purity carbon dioxide Food grade carbon dioxide is produced from oxyfuel fired glassmaking furnace waste gas by a series of steps including quenching the waste gas with aqueous quench liquid, dry-filtering sulfur salt from the gas, scrubbing the filtered gas with aqueous carbo... | 07/20/1999 |
| 5851950 | Catalytic oxidation of organic nitrogen containing compounds A method of treating a gaseous stream containing one or more volatile nitrogen containing organic compounds which comprises contacting the gaseous stream and an oxidizing agent with a catalyst at relatively low temperatures to cause oxidation of the volat... | 12/22/1998 |
| 5820839 | Process for the decomposition of hydrogen cyanide, ammonia, or mixtures thereof in the gas phase Hydrogen cyanide or ammonia present in a gaseous stream is decomposed catalytically in the presence of oxygen at relatively low temperature by contact with carbonaceous adsorbents doped with oxides of first row transition metals, silver or lanthanide elem... | 10/13/1998 |
