Matches 1 - 50 out of 176 1 2 3 4 >
Match Document Document Title
7569200 Method for reducing nitrogen oxide emissions  
The present invention relates to a method for reducing nitrogen oxide emissions in combustion. Fuel is combusted in a first zone, whereby nitrogen oxides are generated. Supplementary fuel is fed in...
7494634 Reduction of nitrogen oxides using multiple split streams  
Systems and methods of removing at least nitrogen oxides from an exhaust fluid generally include dividing a flow of an exhaust fluid comprising a concentration of nitric oxide into three types of...
7485275 Method for removing acid gases and ammonia from a fluid stream  
A method is provided for removing acid gases and ammonia from a fluid stream in which a fluid stream comprising acid gases and ammonia is brought into contact with an aqueous absorption medium. The...
7481988 Method for obtaining a high pressure acid gas stream by removal of the acid gases from a fluid stream  
A method for obtaining an acid gas stream having a pressure of from 3 to 30 bar by removal of acid gases from a fluid stream containing H 2 S, the molar fraction of H 2 S based on the total amount...
7470412 Reduction of CO and NOx in regenerator flue gas  
A hot oxygen stream is fed into a catalyst regenerator flue gas stream that contains carbon monoxide to remove carbon monoxide. NOx precursors such as NH 3 and HCN are converted into N 2 and if...
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...
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...
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...
7374737 Use of a tiO2 composition as catalyst for hydrolyzing COS and/or HCN  
The invention concerns the use of a composition based on TiO 2 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...
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,...
6953558 Process for reducing nitrogen oxide emissions  
A non-catalytic process for reducing nitrogen oxide (NO x ) emissions in the combustion effluent of a stationary combustion apparatus is provided comprising contacting, in the combustion zone of...
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...
6759564 Hydrate-based decontamination of toxic gases  
Areas in which toxic material has been released, particularly in gaseous form but also in liquid form, are decontaminated by forming gas hydrate of the toxic agent. Smaller-molecule toxic agents...
6723349 Polyoxometalate materials, metal-containing materials, and methods of use thereof  
The invention relates to a polyoxometalate topical composition for removing a contaminant from an environment, comprising a topical carrier and at least one polyoxometalate, with the proviso that...
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...
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...
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...
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,...
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...
6187275 Recovery of AlF3 from spent potliner  
A method of recovering AlF 3 from spent potliner using an acid digest to form gaseous HF which is converted to hydrofluoric acid and reacted with alumina trihydrate to form AlF 3 .
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...
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...
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...
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...
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...
6051040 Method for reducing emissions of NO.sub.x 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 NO x -reducing catalyst. The operation of the NO x -reducing catalyst is...
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,...
5968465 Process for removal of HCN from synthesis gas  
Hydrogen cyanide is removed from an HCN containing gas, e.g., a gas containing CO+H 2 , by contact with a metal oxide catalyst comprised of the oxides of molybdenum, titanium, and aluminum in the...
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...
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...
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...
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...
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...
5769925 Process for the elution of precious metals absorbed on active carbon  
A powerful reducing agent such as hydrazine monohydrate is added to the standard eluent solutions such as NsOH-NaCN with or without alcohol. The kinetics of elution of gold or of silver are thus...
5744111 Method for cleaning exhaust gas  
Nitrogen oxides are removed from an exhaust gas containing nitrogen oxides and oxygen in an amount larger than its stoichiometric amount relative to unburned components in the exhaust gas, by using...
5744112 Method for cleaning exhaust gas  
A method of cleaning an exhaust gas using an exhaust gas cleaner constituted by a first catalyst comprising a first porous inorganic oxide supporting an Ag component, a W component and a Pt...
5720785 Method of reducing hydrogen cyanide and ammonia in synthesis gas  
The invention is a method for reducing the hydrogen cyanide and ammonia content of a synthesis gas stream exiting a gasifier including mixing an iron-containing compound with a nitrogen-containing...
5662872 Process for cleaning harmful gas  
There is disclosed a process for cleaning a harmful gas which comprises bringing a gas containing a basic gas as a harmful component such as ammonia and amines into contact with a cleaning agent...
5660807 Process for the removal of HCN from gas mixtures  
The invention relates to a process for the removal of HCN from gas mixtures that contain at least HCN and sulfur compounds, especially from gas mixtures that are obtained by partial oxidation of...
5575983 Catalyst for purifying exhaust gases and process for purifying exhaust gases  
A process for purifying an exhaust gas comprising carbon monoxide, hydrocarbons, nitrogen oxides, and sulfur oxides by periodically adjusting exhaust gas conditions from lean-burn to fuel-rich and...
5562887 Purification of alkyl nitrite-containing exhaust gases  
Alkyl nitrite-containing exhaust gases are purified in continuous form by treating them with equimolar to excess amidosulphuric acid in the form of an aqueous solution in the manner of a...
5496785 Dual impregnated activated carbon  
A dual-impregnated activated carbon composition includes activated carbon impregnated with a Group 6-12 metal salt and a Group 1 metal carbonate salt, where the molar ratio on the activated carbon...
5466427 Catalysis and treatment of gases with the catalysts  
This invention relates to novel cobalt and molybdenum promoted titania and nickel and molybdenum promoted titania catalysts, and molybdenum promoted titania catalysts containing mixtures of cobalt...
5466429 Process for preparing isocyanic acid from cyanuric acid  
Process for preparing isocyanic acid by bringing cyanuric acid into contact with an aluminum catalyst at temperatures of from 300° to 600° C. and isolating the isocyanic acid formed or directly...
5463168 Process for the removal of hydrogen cyanide from FCC hydrocarbon product gas streams  
A process is described wherein the HCN in FCC hydrocarbon gas streams is converted to NH 3 over a catalyst. This conversion has the desirable result of decreasing the amount of CN - in the water...
5415785 Method for removing a cyanide contaminant from refinery waste water streams  
A method for reducing cyanide contaminants in refinery waste waters prior to reuse or release into the environment comprising adding to the waters a cyanide reactive scavenger comprising at least...
5389350 Gas separation using adsorbent activated carbonized polyarylamides  
Novel polyarylamide derived activated carbon materials are provided by a process comprising the carbonization of polyarylamide fibre at a temperature in excess or 400° C. followed by activation at...
5372706 FCC regeneration process with low NO.sub.x CO boiler  
Oxides of nitrogen (NO x ) emissions from an FCC regenerator are reduced by operating the regenerator in partial CO burn mode and adding substoichiometric, or just stoichiometric air to the flue...
5364605 Recovery of cyanide from precious metal tailings  
Process for recovering cyanide values from a mill tailings stream remaining after gold and silver have been leached from an ore, by treating the tailings stream containing both ore insolubles and...
5342599 Surface stabilized sources of isocyanic acid  
Composition, method and apparatus for providing a surface stabilized source of HNCO by adsorbing gaseous or liquid HNCO on the surface of a substrate. HNCO stabilized in this manner is not reactive...
Matches 1 - 50 out of 176 1 2 3 4 >