Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 8147785 | Combustion flue gas NOtreatment Combustion flue gas containing NOX and SOX is treated to remove NOX in a multistep system in which NOX is reduced in the flue gas stream via selective catalytic reduction or selective non-catalytic reduction with ammonia o... | 04/03/2012 |
| 7842267 | Exhaust emission purifying apparatus for engine A technology for purifying an exhaust emission from an engine is provided, in which a misjudgment caused by a time lag between the abnormality detection and an abnormality judgment is avoided, in the case where a plurality of abnormalities is judged on the aqueous s... | 11/30/2010 |
| 7727499 | Ammonia oxidation catalyst for power utilities The present invention is directed to a method for removal by oxidation of the excess ammonia (NH3) gas (“ammonia slip”) resulting from flue gases that have been subjected to selective catalytic reduction (SCR) for reduction of nitrogen oxides (NOx) wi... | 06/01/2010 |
| 7591987 | Method and apparatus for treating ammonia-containing gas A method for treating an ammonia (NH3)-containing gas, which comprises causing the NH3-containing gas to pass through a catalyst tower (9) firstly with a pre-treatment catalyst layer (1) having, in parallel, a flow path involving ... | 09/22/2009 |
| 7442353 | Heat recirculating cooler for fluid stream pollutant removal A process by which heat is removed from a reactant fluid to reach the operating temperature of a known pollutant removal method and said heat is recirculated to raise the temperature of the product fluid. The process can be utilized whenever an intermediate step rea... | 10/28/2008 |
| 7438876 | Multi-stage heat absorbing reactor and process for SCR of NOx and for oxidation of elemental mercury A selective catalytic reduction apparatus has at least first and last catalyst layers in series for reducing nitrogen oxides in a flue gas, at least one interstage heat exchanger located after the first layer and before the last layer, that lowers flue gas temperatu... | 10/21/2008 |
| 7393511 | Ammonia oxidation catalyst for the coal fired utilities A process is described that removes by oxidation the excess ammonia (NH3) gas from flue gases that have been subjected to selective catalytic reduction (SCR) of oxides of nitrogen (NOx) by ammonia injection. The inventive process incorporates a... | 07/01/2008 |
| 7390470 | Process for treating a gas stream Processes for selectively removing sulfur-containing compounds from a gas are described herein. The processes generally include contacting a first gas including carbon dioxide and hydrogen sulfide with a scrub solution including ammonium bisulfite and ammonium sulfi... | 06/24/2008 |
| 7390471 | Apparatus and method for catalytic treatment of exhaust gases An exhaust gas treatment apparatus (20) for reducing the concentration of NOx, HC and CO in an exhaust gas stream (18) such as produced by a gas turbine engine (12) of a power generating station (10). The treatment apparatus in... | 06/24/2008 |
| 7381389 | Wet gas purification method and system for practicing the same A wet gas purification method is provided for removing ammonia from a heavy oil gasification gas, such as coal. The method principally involves a washing step during which absorbent is charged into the gas to absorb ammonia and an ammonia treating step wherein absor... | 06/03/2008 |
| 7364912 | Controlling the flow of hydrogen and ammonia from a hydrogen generator during a breakthrough with hydrated copper (II) chloride trap Gas flow is controlled to a feed gas consuming device depending on whether a contaminant gas is present. In one embodiment, hydrogen gas flow from a hydrogen gas generator to a hydrogen consuming device, such as a fuel cell, gas chromatograph or a flame ionization d... | 04/29/2008 |
| 7341701 | Method, apparatus and plant for treating culinary gaseous effluents A method and apparatus (22) for treating culinary gaseous effluents (Eg) carried in an air extraction duct of a kitchen, the apparatus includes: a unit (24) for storing in liquid form a nucleophilic active product (Pa... | 03/11/2008 |
| 7329397 | Method of removing ammonia from fly ash and fly ash composition produced thereby A method of treating fly ash and fly ash treated thereby, the method involving contacting ammonia-laden fly ash with an organic base-containing treatment composition, where the organic base causes the ammonia within the fly ash to evolve from the fly ash. The treatm... | 02/12/2008 |
| 7326391 | Process for recovery and recycle of ammonia from a vapor stream A process for the recovery of unreacted ammonia from the effluent from a reaction zone used to produce acrylonitrile or methacrylonitrile comprising quenching the reactor effluent with an aqueous solution of ammonium phosphate in at least two stages, thereby capturi... | 02/05/2008 |
| 7314497 | Filter medium and structure Thermoplastic bicomponent binder fiber can be combined with other media, fibers and other filtration components to form a thermally bonded filtration media. The filtration media can be used in filter units. Such filter units can be placed in the stream of a mobile f... | 01/01/2008 |
| 7309372 | Filter medium and structure Thermoplastic bicomponent binder fiber can be combined with other media, fibers and other filtration components to form a thermally bonded filtration media. The filtration media can be used in filter units. Such filter units can be placed in the stream of a mobile f... | 12/18/2007 |
| 7309513 | Broad spectrum filter system including tungsten-based impregnant and being useful for filtering contaminants from air or other gases Filter systems that are effective against a broad range of contaminants including HCN, cyanogen chloride (CK), acid contaminants. and basic contaminants such as ammonia without the need (but with the option, if desired) for using molybdenum or chromium containing ma... | 12/18/2007 |
| 7279800 | Waste oil electrical generation systems An on-site electrical power generation system utilizing environmentally hazardous waste oils as a combustible fuel. The disclosed invention utilizes environmentally hazardous waste oils generated by one or more on-site processes, such as, for example, by the mainten... | 10/09/2007 |
| 7276366 | Biological scrubber odor control system and method A system and method for the purification and biodeodorizing of a gas are disclosed. The system is highly adaptable and capable of operating in a variety of modes to tailor performance of the system to specific odor control applications. The scrubber stages of the sy... | 10/02/2007 |
| 7273015 | Method and apparatus for combustion of residual carbon in fly ash A system for combustion and removal of residual carbon within fly ash particles in which the fly ash particles are fed into an array of process units for combustion. The fly ash particles are subjected to heat and motive air such that as the fly ash particles pass t... | 09/25/2007 |
| 7264785 | Selective catalytic reduction A method of selectively catalysing the reduction of NOx in an exhaust gas flowing in an exhaust system of an internal combustion engine comprising a filter (40) for particulate matter comprising a catalyst capable of selectively catalysing the redu... | 09/04/2007 |
| 7258848 | Process for scrubbing ammonia from acid gases comprising ammonia and hydrogen sulfide The present invention provides a process for removing ammonia as an aqueous salt solution from an acid gas comprising ammonia and hydrogen sulfide. A strong acid, such as sulfuric acid, is used as a scrubbing agent to convert ammonia to an ammonium salt. Control of ... | 08/21/2007 |
| 7250149 | Sulfur gas treatment process The present invention comprises a method of treating an off-gas stream from a refining process to remove sulfur compounds. A portion of the off-gas stream containing hydrogen sulfide is injected at the front end of the thermal reactor and in at least one other locat... | 07/31/2007 |
| 7244405 | Method for cleaning coke oven gas A method for cleaning coke oven gas by washing the gas, whereby a washing liquid is guided into a washing liquid circuit and impurities in the washing liquid are expelled in a desorber. According to the invention, the coke oven gas is washed with caustic soda in a c... | 07/17/2007 |
| 7227049 | Ni catalysts and methods for alkane dehydrogenation Catalysts and methods for alkane oxydehydrogenation are disclosed. The catalysts of the invention generally comprise (i) nickel or a nickel-containing compound and (ii) at least one or more of titanium (Ti), tantalum (Ta), niobium (Nb), hafnium (Hf), tungsten (W), y... | 06/05/2007 |
| 7204967 | Waste water process with scrubber An apparatus and method for treating waste products produced by chemical processing plants. Steam stripping waste sour water results in a vapor including ammonia and hydrogen sulfide. A scrubber unit including a quenching column produces a concentrated ammonium sulf... | 04/17/2007 |
| 7199088 | Lubricating oil for a diesel powered engine and method of operating a diesel powered engine A lubricating oil composition useful for a diesel-powered engine is provided that reduces NOx emissions level produced from a diesel-powered engine. The lubricating oil comprises a base oil and at least one oil-dispersible source of HNCO such as isocyanates. A metho... | 04/03/2007 |
| 7192649 | Passivation layer on aluminum surface and method thereof A protective passivation layer is formed on the surface of an aluminum mass, such as bare aluminum particles, creating a protected aluminum mass. Formation of the protective layer onto the aluminum mass may occur from an in-situ process. ... | 03/20/2007 |
| 7182927 | Hydrothermally stable metal promoted zeolite beta for NOreduction The present invention is directed to an iron-promoted zeolite beta catalyst useful in the selective catalytic reduction of nitrogen oxides with ammonia in which the iron-promoted zeolite beta is treated so as to provide increased amounts of the iron promoter in the ... | 02/27/2007 |
| 7168680 | Embedded control valve using electroactive material A microfluidic control valve (100) comprising a dielectric structure (105) defining at least one cavity (260) therein. An electroactive material (305), such as an electroactive polymer, is disposed in a portion of the cavity. The electroa... | 01/30/2007 |
| 7166262 | Control for ammonia slip in selective catalytic reduction A method of operating a selective catalytic reduction (SCR) system includes detecting at least one of an ammonia level and a nitrogen oxide level within a cross-sectional area of a chamber at a downstream end of a SCR catalyst. The cross-sectional area is divided in... | 01/23/2007 |
| 7160527 | Method for treating amonia-containing effluent water Disclosed are a method and an apparatus for treating an effluent containing ammonia in which method and apparatus N2O concentration in the gas at the outlet of a catalyst tower does not rise to a high level even when the NH3 concentration in th... | 01/09/2007 |
| 7157166 | Ammonia fuel cell This invention refers to generating electrical energy comprising an ammonia fuel cell for generating electrical energy including a catalyst being in contact with a high temperature proton conducting membrane and the catalyst comprising at least one decomposition cat... | 01/02/2007 |
| 7153427 | Nitrogen recovery system and method using heated air as stripping gas A process for the recovery of nitrogen from anaerobically digested liquid waste and for the collection of the nitrogen as nitrate compounds that can be used to produce fertilizer and compost, includes stripping ammonia from anaerobically digested liquid waste, and c... | 12/26/2006 |
| 7140187 | Urea based composition and system for same A method and apparatus for generating energy from a composition comprising urea and water are described. The method in one embodiment includes: (a) reacting the urea with water to form ammonia; and (b) oxidizing the ammonia formed in step (a) to form water and nitro... | 11/28/2006 |
| 7067101 | Water wall boiler for air and oxygen fired Claus sulfur recovery units The thermal combustion step of the modified Claus process is carried out in a water-wall boiler instead of a refractory-lined reaction furnace. The water-wall boiler replaces the conventional refractory-lined furnace and waste heat boiler when air, oxygen, or oxygen... | 06/27/2006 |
| 7047894 | Method and apparatus for combustion of residual carbon in fly ash A system for combustion and removal of residual carbon within fly ash particles in which the fly ash particles are fed into an array of process units for combustion. The fly ash particles are subjected to heat and motive air such that as the fly ash particles pass t... | 05/23/2006 |
| 7044993 | Microbicidal air filter Microbicidal air filter for use with an air passageway, which includes an immobilization network including a plurality of fibers having an amount of at least one antimicrobial agent incorporated and molecularly bonded into a structure thereof sufficient to substanti... | 05/16/2006 |
| 7033554 | Apparatus for producing water for use in manufacturing semiconductors Disclosed is a process of treating semiconductor substrates, including the production of pure water, a method of producing the pure water for semiconductor fabrication, and a water-producing apparatus. Ammonia is catalytically oxidized in a catalytic conversion reac... | 04/25/2006 |
| RE39041 | Ammonia decomposition catalysts An ammonia decomposition catalyst wherein a first catalyst having a crystalline silicate which is represented by the formula in terms of molar ratio of oxides as dehydrated: (1±0.8)R2O.[aM2O3.bM′O.cAl2O3 | 03/28/2006 |
