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Class Information
Number: 423/235
Name: Chemistry of inorganic compounds > Modifying or removing component of normally gaseous mixture > Nitrogen or nitrogenous component
Description: Processes in which the component is molecular nitrogen or a nitrogen-containing compound.










Sub-classes under this class:

Class Number Class Name Patents
423/237 Ammonia 291
423/236 Component also contains carbon (e.g., cyanogen, hydrogen cyanide, etc.) 171
423/239.1 Utilizing solid sorbent, catalyst, or reactant 1,461


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Patent Number Title Of Patent Date Issued
8702845 System and method for low NOx emitting regeneration of desiccants Apr. 22, 2014
8703083 Bifunctional active sites for adsorption of NOx Apr. 22, 2014
8668892 Method and system for NO.sub.x removal from a flue gas Mar. 11, 2014
8652236 Method for recovery of high purity carbon dioxide Feb. 18, 2014
8628741 Off gas treatment using a metal reactant alloy composition Jan. 14, 2014
8609026 Conversion of nitrogen dioxide (NO.sub.2) to nitric oxide (NO) Dec. 17, 2013
8603432 Transition metal/zeolite SCR catalysts Dec. 10, 2013
8603422 Gas separation and recovery apparatus and gas separation and recovery method Dec. 10, 2013
8603941 Method and apparatus for the purification of exhaust gas from a compression ignition engine Dec. 10, 2013
8597603 Decomposition/elimination method using a photocatalytic material Dec. 3, 2013
8591767 Functional fluid and a process for the preparation of the functional fluid Nov. 26, 2013
8591843 Solvent for separating acid gas components from technical gases Nov. 26, 2013
8591848 Selective catalytic NO.sub.x reduction process and control system Nov. 26, 2013
8569199 Vanadium-free catalyst for selective catalytic reduction and process for it's preparation Oct. 29, 2013
8562929 Selective catalytic reduction via electrolysis of urea Oct. 22, 2013
8551430 Method for the selective catalytic reduction of nitrogen oxides in exhaust gas from an internal combustion engine, and exhaust system Oct. 8, 2013
8541622 Acid gas scrubbing composition Sep. 24, 2013
8535430 Hydrazine filtration method and system Sep. 17, 2013
8535627 Ketone/water mixtures for NOx removal Sep. 17, 2013
8535628 Exhaust gas purifying catalyst Sep. 17, 2013
8529852 Flue-gas purification and reclamation system and method thereof Sep. 10, 2013
8529855 Methods and system for removing gas components from flue gas Sep. 10, 2013
8512447 Method for purifying a chlorine supply Aug. 20, 2013
8501131 Method and apparatus to inject reagent in SNCR/SCR emission system for boiler Aug. 6, 2013
8501127 Neutralization of gaseous contaminants by artificial photosynthesis Aug. 6, 2013
8496895 Exhaust gas treating apparatus and treating method for carbon dioxide capture process Jul. 30, 2013
8491844 Scrubbing a gas containing nitrogen oxides Jul. 23, 2013
8486366 Activation of reactive compound with catalyst Jul. 16, 2013
8475750 Air pollution control system and air pollution control method Jul. 2, 2013
8470274 Method for feeding reducing agent into an exhaust gas system and corresponding exhaust gas system and motor vehicle Jun. 25, 2013
8461335 Acid gas scrubbing composition Jun. 11, 2013
8454916 Selective catalytic reduction (SCR) catalyst depletion control systems and methods Jun. 4, 2013
8449288 Urea-based mixing process for increasing combustion efficiency and reduction of nitrogen oxides (NOx) May. 28, 2013
8449655 Process for isolating N.sub.2O May. 28, 2013
8449851 Mercury removing system and mercury removing method May. 28, 2013
8444942 Process for removing contaminants from gas streams May. 21, 2013
8425869 NOx purifying catalyst Apr. 23, 2013
8425866 Control of emissions Apr. 23, 2013
8414852 Prevention of nitro-amine formation in carbon dioxide absorption processes Apr. 9, 2013
8409534 Control of emissions Apr. 2, 2013
8404203 Processes for reducing nitrogen oxides using copper CHA zeolite catalysts Mar. 26, 2013
8404616 Photocatalyst and method for producing same Mar. 26, 2013
8404900 Absorbents for separating acidic gases Mar. 26, 2013
8398945 Removal of ammonia nitrogen, ammonium nitrogen and urea nitrogen by oxidation with hypochlorite-containing solutions from exhaust air in plants for producing ammonia and urea Mar. 19, 2013
8398944 Air pollution control system and air pollution control method Mar. 19, 2013
8388917 Air pollution control system and air pollution control method Mar. 5, 2013
8388918 Physical separation and sequestration of carbon dioxide from the exhaust gases of fossil fuel combustion Mar. 5, 2013
8388920 Selective catalytic reduction via electrolysis of urea Mar. 5, 2013
8389432 Structured automotive catalyst with improved thermal ageing stability Mar. 5, 2013
8383074 Process and device for simultaneously desulfurizing and denitrating the flue gas with the seawater Feb. 26, 2013

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