U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 5285430

Behavior Modification Wristwatch

A wristwatch including a watch band and a watch body having an octagon shaped perimeter and being red in color and having the word STOP thereon to resemble a stop sign.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 423/235 - Nitrogen or nitrogenous component


Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Processes in which the component is molecular nitrogen or
No. of patents: 829
Last issue date: 04/03/2012


1                      
NumberTitleIssue Date
8147784Combined waste gas treatment of waste gas streams containing ammonia and nitrogen oxides in industrial plants
Combined removal of both ammonia from an ammonia-containing waste gas and nitrogen oxides from a nitrogen oxide-containing waste gas in a combined ammonia/urea synthesis plant is accomplished by mixing the gases and employing one or both of selective non-catalytic r...
04/03/2012
8021635Combustion furnace humidification devices, systems and methods
An injection device for humidifying a reactor space and injecting and dispersing reagents into the humidified reactor space, including an exterior injection duct for high-velocity gas injection and at least one interior injector for reagent and humidifying agent inj...
09/20/2011
7998444Method of reducing nitrogen oxides in a gas stream with vaporized ammonia
The present invention is a method for selective reduction of nitrogen oxides in a gas stream with ammonia wherein the ammonia is vaporized prior to contacting it with the carrying fluid. The present invention also comprises a reducing agent dispersion system for use...
08/16/2011
7959884Apparatus for purifying air and purifying method thereof
An air purifying apparatus includes an air flow generating device for generating a flow of air, a nozzle spraying water to the air flowing through the air flow generating device, a plasma module performing a plasma reaction on the air containing the water sprayed fr...
06/14/2011
7901647Enhancement of conventional SCR and SNCR processes with ammonia destruction catalyst
An apparatus and method for achieving increased NOx removal efficiency from an emissions control portion of a fossil fuel fired boiler while controlling ammonia slip provides excess levels of ammonia above those levels conventionally employed in SCR and/o...
03/08/2011
7790128Hydrogen peroxide catalytic decomposition
Nitric oxide in a gaseous stream is converted to nitrogen dioxide using oxidizing species generated through the use of concentrated hydrogen peroxide fed as a monopropellant into a catalyzed thruster assembly. The hydrogen peroxide is preferably stored at stable con...
09/07/2010
7780934Method and system for reducing ammonia slip after selective reduction of NOx
A process is described that removes by chemical oxidation the excess ammonia (NH3) gas from flue gases that have been subjected to selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) of oxides of nitrogen (NOx) by a...
08/24/2010
7780935Method for controlling NOemissions in the FCCU
A process for the reduction of NOx emissions from a regeneration zone during a fluid catalytic cracking (FCC) process are disclosed. The process comprises contacting a hydrocarbon feedstock with a circulating inventory of an FCC cracking catalyst and a NO...
08/24/2010
7767177Device permitting the reduction of NOX emissions from FCC fumes
The present invention describes a new device which permits a reduction of NOx emissions contained in the fumes from FCC regenerators. The device consists essentially of a conveyance conduit which connects the two regeneration stages and which has an outlet opening i...
08/03/2010
7754172Method for isolating NO
The present invention relates to a process for purifying a gas mixture G-0 comprising dinitrogen monoxide, at least comprising the absorption of the gas mixture G-0 in an organic solvent, subsequent desorption of a gas mixture G-1 from the laden organic solvent, abs...
07/13/2010
7700058Process for denitration of exhaust gas
A denitration process for removing nitrogen oxides contained in low-temperature exhaust gas at a high denitration rate; namely, a denitration process for reductively removing nitrogen oxides contained in an exhaust gas (x) containing nitrogen monoxide and sulfur dio...
04/20/2010
7691350Method 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...
04/06/2010
7569200Method 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 another zone under reducing conditions. At the same time, the temper...
08/04/2009
7566431Method for the treatment of combustion flue gas
A method for the removal of nitrogen oxides contained in combustion flue gas through treatment with gaseous ammonia, in which the gaseous ammonia is generated in situ by hydrolysis reaction of an aqueous urea solution (L4) whereby the ammonia generated by the...
07/28/2009
7537743Method for in-furnace regulation of SOin catalytic NOx reducing systems
A method of controlling SO3 flue gas concentration in a combustion process utilizing a SCR using a sulfurous fuel, the method steps including: providing a combustion system with low NOx burners and SCR; partially combusting the fuel in a first stage to cr...
05/26/2009
7498009Controlled spectrum ultraviolet radiation pollution control process
A method for reducing or substantially eliminating oxides of nitrogen from an effluent gas stream, that includes providing a source of ultraviolet radiation with a precise wavelength, adding ammonia or an ammonia based reagent to the effluent stream, upstream of the...
03/03/2009
7485276Method for the removal of Noand NO from the tail gas in nitric acid production
A process is described for reducing the NOx concentration and N2O concentration from the residual gas from nitric acid production. The process encompasses the passing of the residual gas leaving the absorption column, prior to entry into the re...
02/03/2009
7470412Reduction 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 NH3 and HCN are converted into N2 and if NOx is present in the flue gas stream the addition o...
12/30/2008
7455819Apparatus for simultaneous dry desulfurization/denitrification
It is an high efficiency and low cost apparatus for simultaneous dry desulfurization and denitration (10), capable of simultaneous oxidation of nitrogen monoxide and sulfur dioxide by chain reaction with OH radical, provided with an OH radical supplying unit ...
11/25/2008
7455820Process for removing sulfur dioxide and nitrogen oxides from flue gas using chlorine dioxide
Disclosed herein is a process for removing sulfur dioxide (SO2) and nitrogen oxides (NOx) from flue gas using chlorine dioxide (ClO2). In the process, chlorine dioxide is allowed to react with flue gas in an alkaline solution so as t...
11/25/2008
7438878Selective catalytic reduction of NO
A gas stream containing nitrous oxide and ammonia is contacted with a catalyst composition containing a zeolite. N2O is reduced to N2 and H2O at low temperatures in a highly efficient manner. Ammonia-mediated reduction of nitrous oxi...
10/21/2008
7435400Optimizing post-combustion nitrogen oxide and sulfur dioxide reductions and improving combustion efficiency in coal fired boilers
A method for increasing the nitrogen oxide emissions by either removing or modifying fuel rich nitrogen oxide (NOx) reduction processes thereby improving combustion efficiencies especially with low volatile low sulfur coals, and remove unburned carbon, re...
10/14/2008
7431906Selective catalytic reduction
A process for the selective catalytic reduction of nitrogen oxides with ammonia in a lean-mix exhaust gas from a combustion process operated with a first, lean-mix air/fuel mixture, wherein the ammonia required for selective reduction is obtained from a second, rich...
10/07/2008
7416716Purification of carbon dioxide
SO2 and/or NOx are removed from gaseous CO2 at elevated pressure(s) in the presence of molecular oxygen and water and, when SO2 is to be removed, NOx, to convert SO2 to sulfuric acid and/or NOx
08/26/2008
7416582Method and apparatus for NO and Hg removal
A cyclic process for the removal of NOx from a NOx containing feed gas, and optionally removal mercury vapour and/or sulfur dioxide is provided. A process is also provided by which an iron chelate absorbent may be thermally regenerated. ...
08/26/2008
7404939Mercury removal sorbent
A sorbent composition comprising a vanadium compound and a TiO2 support material is disclosed. Methods of making and using the composition to remove heavy metals or heavy metal containing compounds from a fluid stream are also provided. Such methods are p...
07/29/2008
7404938Emission control system
Methods and apparatus utilizing hydrogen peroxide are useful to reduce NOx, SOx and mercury (or other heavy metal) emissions from combustion flue gas streams. Continuous concentration of hydrogen peroxide to levels approaching or exceeding propellant-grade hydrogen ...
07/29/2008
7404940Method for flue-gas reduction of pollutants in combustion processes
Systems and methods for reduction of pollutants in combustion processes using combined rotating opposed fired air (ROFA) and fuel injection sorbents (FSI) for increased chemical reactivity. ...
07/29/2008
7384615Method oil shale pollutant sorption/NOreburning multi-pollutant control
A method of decreasing pollutants produced in a combustion process. The method comprises combusting coal in a combustion chamber to produce at least one pollutant selected from the group consisting of a nitrogen-containing pollutant, sulfuric acid, sulfur trioxide, ...
06/10/2008
7384616Waste gas treatment process including removal of mercury
A process for removing contaminants from a waste gas stream comprises treating the waste gas stream to remove at least one of SO2 and NOx and to obtain a lean stream having a reduced level of at least one of SO2 and NOx an...
06/10/2008
7374735Method for nitrogen oxide reduction in flue gas
A method of decreasing the concentration of nitrogen oxides in a combustion gas flowing through a vessel including the steps of: generating a flue gas in a combustion zone of the vessel, the flue gas containing nitrogen oxides and carbon monoxide; providing overfire...
05/20/2008
7374736Method to reduce flue gas NOx
A method of decreasing the concentration of nitrogen oxides in a combustion flue gas in which a nitrogen reducing agent is introduced together with the overfire air to mixes with the products of primary combustion along with the overfire air. The nitrogen agent redu...
05/20/2008
7371313On-site generation, purification, and distribution of ultra-pure anhydrous ammonia
A system and method for generating, purifying, and using ultra-pure ammonia on-site, such as at a semiconductor manufacturing facility. The system includes an ammonia generation system configured to generate ammonia including carbon dioxide, water, and other impurit...
05/13/2008
7368094Plasma-assisted NOreduction
Ozone, preferably produced in an ambient air stream passed through a non-thermal hyperplasma reactor, is added to the hot exhaust gas stream from a lean-burn (oxygen-rich) combustion source. The ozone converts much of the NO in the NOx containing exhaust ...
05/06/2008
7368090FCC spent catalyst distributor
An distributor arrangement introduces spent FCC catalyst more uniformly across the dense bed of the regenerator to provide more even contact with regeneration gas in order to avoid hot spots and zones of incomplete combustion. The invention forms a fluidized hopper ...
05/06/2008
7363867Method and apparatus for adding reducing agent to secondary overfire air stream
A combustion boiler for burning fuel and producing heat to generate steam. A method of minimizing discharging of nitrogen oxides from a combustion boiler comprising the steps of spraying a reducing agent into an overfire air stream and supplying the overfire air str...
04/29/2008
7361319Mixed metal oxide sorbents
The present invention is directed to methods for reducing SOx, NOx, and CO emissions from a fluid stream comprising contacting said fluid stream with a compound comprising magnesium and aluminum and having an X-ray diffraction pattern displaying at least a reflectio...
04/22/2008
7361321Exhaust stream treatment
A method comprises injecting a reductant stream comprising a hydrocarbon reductant and water into an exhaust chamber comprising a nitrogen oxide-containing exhaust stream; contacting a composition comprising the reductant stream and exhaust stream with a catalyst; a...
04/22/2008
7361209Apparatus and process for preparing sorbents for mercury control at the point of use
A system for treating a contaminated gas stream is provided that includes a comminution device 204 operable to effect size reduction of a plurality of sorbent particles and form a plurality of comminuted particles, a plurality of nozzles 224 distribute...
04/22/2008
7357903Method for reducing NOx during combustion of coal in a burner
An organically complexed nanocatalyst composition is applied to or mixed with coal prior to or upon introducing the coal into a coal burner in order to catalyze the removal of coal nitrogen from the coal and its conversion into nitrogen gas prior to combustion of th...
04/15/2008
1                      
 
Sign InRegister
Username  
Password   
forgot password?