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Class Information
Number: 423/213.2
Name: Chemistry of inorganic compounds > Modifying or removing component of normally gaseous mixture > Mixture is exhaust from internal-combustion engine > Utilizing as solid sorbent, catalyst, or reactant a material containing a transition element
Description: Processes, in which the material used to treat the gaseous mixture is in the solid-state and comprises a transition element, or compound thereof, and which functions to (1) modify a component, or (2) attract and retain a component, or (3) react with and chemically change a component.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6096682 |
Process for the production of a catalyst body for the catalytic treatment of gas, catalyst body and catalytic converter |
Aug. 1, 2000 |
| 6089015 |
Method of purifying a lean exhaust gas and catalytic system therefor |
Jul. 18, 2000 |
| 6089014 |
Engine exhaust system with reduced hydrocarbon emissions |
Jul. 18, 2000 |
| 6080375 |
Exhaust gas purification catalyst with improved hydrocarbon conversion |
Jun. 27, 2000 |
| 6074973 |
Catalyzed hydrocarbon trap material and method of making the same |
Jun. 13, 2000 |
| 6074619 |
Process for selective reduction of NOx in exhaust gas |
Jun. 13, 2000 |
| 6042797 |
Adsorbent for ethylene, method for adsorbing and removing ethylene and method for purifying an exhaust gas |
Mar. 28, 2000 |
| 6033461 |
Selective nitrogen oxides adsorption from hot gas mixtures and thermal release by adsorbent |
Mar. 7, 2000 |
| 6033640 |
Method for the reagentless removal of nitrogen oxides from exhaust streams |
Mar. 7, 2000 |
| 6030589 |
Catalyst, method for its production and use of same |
Feb. 29, 2000 |
| 6030590 |
Reduction purification method of nitrogen oxide-containing exhaust gas |
Feb. 29, 2000 |
| 6027703 |
Method for operating a purification device for gases as well as a purification device for gases |
Feb. 22, 2000 |
| 6017503 |
Method of removing NO.sub.x from exhaust gases |
Jan. 25, 2000 |
| 6004520 |
Method for operating a purification device, a purification device and use of the same |
Dec. 21, 1999 |
| 6001318 |
Process for lowering nitrogen oxide levels in combustion engine exhaust gas |
Dec. 14, 1999 |
| 6001320 |
Method of adsorbing hydrocarbons |
Dec. 14, 1999 |
| 6001319 |
Method of removing nitrogen oxides using material for absorbing nitrogen oxides |
Dec. 14, 1999 |
| 5994260 |
Cerium oxide with pores having a lamellar structure, preparation method therefor and use thereof in catalysis |
Nov. 30, 1999 |
| 5993762 |
Method of using catalyst containing noble metal and cerium dioxide |
Nov. 30, 1999 |
| 5992142 |
No exhaust emission control method and arrangement |
Nov. 30, 1999 |
| 5989507 |
Catalyst composition |
Nov. 23, 1999 |
| 5980844 |
SO.sub.2 -tolerant silver oxide catalysts |
Nov. 9, 1999 |
| 5976476 |
Catalytic composition comprising a mixture of cerium oxide with manganese, iron or praseodymium oxide, process for its preparation and its use in automobile afterburning catalysis |
Nov. 2, 1999 |
| 5968466 |
Copper-silver zeolite catalysts in exhaust gas treatment |
Oct. 19, 1999 |
| 5968462 |
Process for purifying exhaust gases |
Oct. 19, 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 |
| 5951956 |
Catalyst for purifying exhaust gas and method for purifying exhaust gas |
Sep. 14, 1999 |
| 5948376 |
Catalyst for purifying exhaust gases |
Sep. 7, 1999 |
| 5945080 |
Catalyst and process for its production |
Aug. 31, 1999 |
| 5938837 |
Cerium oxide ultrafine particles and method for preparing the same |
Aug. 17, 1999 |
| 5925326 |
Process for the production of high purity carbon dioxide |
Jul. 20, 1999 |
| 5922295 |
Sulfur-resistant NO.sub.x traps containing tungstophosphoric acid and precious metal |
Jul. 13, 1999 |
| 5922294 |
High surface area, thermally stabilized titania automotive catalyst support |
Jul. 13, 1999 |
| 5911960 |
Process for purifying exhaust gases |
Jun. 15, 1999 |
| 5910293 |
Exhaust management system control |
Jun. 8, 1999 |
| 5905056 |
Catalyst and a method for its production and use of same |
May. 18, 1999 |
| 5899678 |
Oxidation and/or combustion catalyst for use in a catalytic exhaust system and process for its preparation |
May. 4, 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 |
| 5891409 |
Pre-converted nitric oxide gas in catalytic reduction system |
Apr. 6, 1999 |
| 5884474 |
Method and catalyst unit for treating diesel engine exhaust |
Mar. 23, 1999 |
| 5884473 |
System for exhaust gas purification and method for exhaust gas purification using said system |
Mar. 23, 1999 |
| 5879645 |
Method for removing nitrogen oxides in exhaust gas by selective catalytic reduction and catalyst for reduction of nitrogen oxides |
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 |
| 5869013 |
Process and catalyst for reducing No.sub.x in exhaust combustion gases |
Feb. 9, 1999 |
| 5863508 |
Catalytic reactor system |
Jan. 26, 1999 |
| 5853679 |
Removal of nitrogen oxide from exhaust 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 |
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