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Class Information
Number: 423/239.1
Name: Chemistry of inorganic compounds > Modifying or removing component of normally gaseous mixture > Nitrogen or nitrogenous component > Utilizing solid sorbent, catalyst, or reactant
Description: Process in which the treating material is a solid and functions to (a) modify a component, (b) attract and retain a component, or (c) react with and chemically change a component.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5997830 |
Method of purifying exhaust gas from internal combustion engine |
Dec. 7, 1999 |
| 5993762 |
Method of using catalyst containing noble metal and cerium dioxide |
Nov. 30, 1999 |
| 5985222 |
Apparatus and method for reducing NOx from exhaust gases produced by industrial processes |
Nov. 16, 1999 |
| 5980844 |
SO.sub.2 -tolerant silver oxide catalysts |
Nov. 9, 1999 |
| 5980847 |
Method for removing nitrogen oxide |
Nov. 9, 1999 |
| 5976475 |
Reducing NO.sub.x emissions from an engine by temperature-controlled urea injection for selective catalytic reduction |
Nov. 2, 1999 |
| 5976477 |
Reaction control method using carbon soot molecules and organometallic complexes in excited state |
Nov. 2, 1999 |
| 5972834 |
Carbon adsorbent, manufacturing method therefor, gas separation method and device therefor |
Oct. 26, 1999 |
| 5968464 |
Urea pyrolysis chamber and process for reducing lean-burn engine NO.sub.x emissions by selective catalytic reduction |
Oct. 19, 1999 |
| 5965098 |
Methods and devices for scrubbing gases |
Oct. 12, 1999 |
| 5961837 |
Process for treatment of industrial waste |
Oct. 5, 1999 |
| 5955045 |
Removal of nitrogen oxides from gases |
Sep. 21, 1999 |
| 5955046 |
Catalytic material for removing nitrogen oxides apparatus for treating nitrogen oxides using the material, and method of removing nitrogen oxides |
Sep. 21, 1999 |
| 5950421 |
Tungsten-modified platinum NOx traps for automotive emission reduction |
Sep. 14, 1999 |
| 5948376 |
Catalyst for purifying exhaust gases |
Sep. 7, 1999 |
| 5945080 |
Catalyst and process for its production |
Aug. 31, 1999 |
| 5943865 |
Reheating flue gas for selective catalytic systems |
Aug. 31, 1999 |
| 5939037 |
Sulfur tolerant NO.sub.x traps highly loaded with sodium or potassium |
Aug. 17, 1999 |
| 5935539 |
Reactive composition and method for the purification of a nitric oxide containing gas |
Aug. 10, 1999 |
| 5935540 |
Cleaning process for harmful gas |
Aug. 10, 1999 |
| 5925326 |
Process for the production of high purity carbon dioxide |
Jul. 20, 1999 |
| 5922293 |
Process for purifying exhaust gases |
Jul. 13, 1999 |
| 5922295 |
Sulfur-resistant NO.sub.x traps containing tungstophosphoric acid and precious metal |
Jul. 13, 1999 |
| 5919425 |
Catalyzed packing material for regenerative catalytic oxidation |
Jul. 6, 1999 |
| 5911960 |
Process for purifying exhaust gases |
Jun. 15, 1999 |
| 5912198 |
Staged catalytic ammonia decomposition in integrated gasification combined cycle systems |
Jun. 15, 1999 |
| 5910294 |
Abatement of NF.sub.3 with metal oxalates |
Jun. 8, 1999 |
| 5906803 |
Process for removing ammonia from gasification gas |
May. 25, 1999 |
| 5906958 |
Catalyst for purifying automobile exhausts and method of manufacturing the catalyst |
May. 25, 1999 |
| 5905056 |
Catalyst and a method for its production and use of same |
May. 18, 1999 |
| 5902561 |
Low temperature inert gas purifier |
May. 11, 1999 |
| 5897846 |
Catalytic converter having a catalyst with noble metal on molecular sieve crystal surface and method of treating diesel engine exhaust gas with same |
Apr. 27, 1999 |
| 5898015 |
Material for absorbing nitrogen oxides comprising hollandite-type complex oxide |
Apr. 27, 1999 |
| 5891345 |
Treatment process for wastewater streams |
Apr. 6, 1999 |
| 5891409 |
Pre-converted nitric oxide gas in catalytic reduction system |
Apr. 6, 1999 |
| 5888464 |
Catalyst composition containing an intimately combined cerium-zirconium oxide |
Mar. 30, 1999 |
| 5879645 |
Method for removing nitrogen oxides in exhaust gas by selective catalytic reduction and catalyst for reduction of nitrogen oxides |
Mar. 9, 1999 |
| 5879646 |
Treatment of NH.sub.3 -containing gases |
Mar. 9, 1999 |
| 5876680 |
Bimetallic tungsten/platinum catalysts for lean-burn emissions |
Mar. 2, 1999 |
| 5876681 |
Spinel-based catalysts for reducing exhaust emissions of NO.sub.x |
Mar. 2, 1999 |
| 5874057 |
Lean NO.sub.x catalyst/trap method |
Feb. 23, 1999 |
| 5869419 |
Nitrogen oxide removal catalyst |
Feb. 9, 1999 |
| 5863855 |
Nitrogen oxide removing catalysts |
Jan. 26, 1999 |
| 5853679 |
Removal of nitrogen oxide from exhaust gas |
Dec. 29, 1998 |
| 5853683 |
Hybrid SCR/SNCR process |
Dec. 29, 1998 |
| 5853684 |
Catalytic removal of sulfur dioxide from flue gas |
Dec. 29, 1998 |
| 5854079 |
Method for detection of performance reduction of exhaust gas purification catalyst |
Dec. 29, 1998 |
| 5851501 |
Process for absorbing and desorbing nitrogen oxides in exhaust gases |
Dec. 22, 1998 |
| 5849254 |
Method for purifying exhaust gases with two layer catalyst in oxygen-rich atmosphere |
Dec. 15, 1998 |
| 5843390 |
Method of using a catalytic filter |
Dec. 1, 1998 |
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