| Patents for C01B 21 - Nitrogen; Compounds thereof (10,781) |
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| 03/12/1997 | EP0761293A1 Polyetherimide membrane |
| 03/12/1997 | EP0669896A4 PROCESS FOR REMOVING NOx/SOx OXIDES FROM GASES --------------. |
| 03/12/1997 | EP0660746B1 Process for the purification of inert gases |
| 03/12/1997 | EP0563205B1 Method of producing a sintered carbonitride alloy for semifinishing machining |
| 03/12/1997 | EP0563204B1 Method of producing a sintered carbonitride alloy for fine milling |
| 03/06/1997 | DE19532385A1 Electrically conducting solid used for protecting (optical) glass fibres |
| 03/05/1997 | CN1144321A Cryagenic rectification system for fluorine compound recovery |
| 03/04/1997 | US5607297 Moving bed process for carbothermally synthesizing nonoxide ceramic powders |
| 03/04/1997 | CA2049806C Modified carbon molecular sieves for gas separation |
| 03/02/1997 | WO1997010042A1 Method of removing nitrogen oxides from a gas flow |
| 02/26/1997 | EP0759011A1 Process for extracting or recovering acids |
| 02/25/1997 | US5606056 Carbon nitride and its synthesis |
| 02/25/1997 | CA2111480C Deoxygenation of non-cryogenically produced nitrogen with a hydrocarbon |
| 02/20/1997 | WO1997006099A1 Method of preparing dinitramidic acid and salts thereof |
| 02/19/1997 | EP0758642A2 Synthetic process of ketazine and synthetic process of hydrazine hydrate |
| 02/19/1997 | EP0758561A1 Zeolites and their use in the separation of nitrogen from other gases |
| 02/18/1997 | US5603811 Process for the treatment of an aqueous solution mainly containing nitric acid and hydrofluoric acid |
| 02/13/1997 | DE19632080A1 Verfahren zur Herstellung von Aluminiumnitrid A process for producing aluminum nitride |
| 02/13/1997 | DE19602450C1 Vakuumdruckwechseladsorptionsverfahren und -vorrichtung Vakuumdruckwechseladsorptionsverfahren and apparatus |
| 02/12/1997 | EP0757922A2 Autogenous grinding of silicon nitride |
| 02/12/1997 | EP0757919A1 Process for the adsorption of nitrogen from gas mixtures using pressure swing adsorption with zeolites |
| 02/12/1997 | CN1142477A Process for producing aluminum nitride powders by self diffusion process at high temperature |
| 02/12/1997 | CN1142410A Improved polymeric Membrane |
| 02/11/1997 | US5601874 Forming a nonhydrolytic protective coatings with an alkyl- or alkyloxyalkyl silicate |
| 02/09/1997 | CA2182839A1 Autogenous milling of silicon nitride |
| 02/09/1997 | CA2182641A1 Process for the absorption of nitrogen from gas mixtures using pressure-swing adsorption with zeolites |
| 02/06/1997 | WO1997003935A1 Silicon nitride nanowhiskers and method of making same |
| 02/06/1997 | WO1997003921A1 Lithium amide process |
| 02/06/1997 | WO1997003745A1 Single gas purifier vessel and heat exchanger |
| 02/05/1997 | EP0756886A2 Process for adsorbing of nitrogen from gas mixtures by pressure swing adsorption with zeolites |
| 02/05/1997 | EP0756580A1 Method and apparatus for producing nanostructured ceramic powders and whiskers |
| 02/05/1997 | CN1033967C Method for continuously preparing aluminium nitride by carbonitrogenation of aluminium oxide |
| 02/04/1997 | US5599380 Polymeric membrane |
| 02/02/1997 | CA2182250A1 Process for the adsorption of nitrogen from gas mixtures by means of pressure swing adsorption with zeolites |
| 01/29/1997 | EP0755367A1 Silicon nitride/silicon carbide composite powders, their preparation and densified materials prepared using the composite powders |
| 01/28/1997 | US5597543 Spherical nitride |
| 01/22/1997 | EP0754651A1 Surface treatment of crystalline sodium nitrite or sodium nitrate |
| 01/21/1997 | US5595718 Calcining, baking, milling |
| 01/21/1997 | US5595713 Purification of flue gas to prevent air pollution by forming acids |
| 01/15/1997 | EP0753493A1 Granulated powder for molding and process for producing the same, and silicon nitride sintered body using the same |
| 01/15/1997 | CN1140097A Process and plant for generating nitrogen for heat treatment |
| 01/14/1997 | US5593480 Apparatus for the oxygen enrichment of air |
| 01/14/1997 | CA2003811C Production of silicon nitride and the product thereby obtained |
| 01/08/1997 | EP0751911A1 Aluminium nitride based platelets, process for their preparation and use thereof |
| 01/08/1997 | EP0674599B1 Method of making metal nitride powders |
| 01/08/1997 | CN1139587A Purifying method for inactive gas recovered from solid condensation reactor of Paraprex |
| 01/07/1997 | US5590969 Silicon and alkaline earth metal oxynitride |
| 01/02/1997 | EP0750934A2 VSA adsorption process |
| 01/02/1997 | EP0750933A1 Process and apparatus for the preparation of a substantially purified flux of at least one of the impurities chosen between oxygen and carbon monoxide |
| 01/01/1997 | CN1139420A Production of NO from N2O |
| 01/01/1997 | CN1139156A Adsorptive palladium-alloy net |
| 12/31/1996 | US5589714 Semiconductor encapsulated in cured thermosetting resin filled with aluminum nitride particles having layer of aluminum oxynitride containing amorphous silicon oxide, additional layer of silicon oxide or aluminum silicon oxide |
| 12/31/1996 | US5589037 Method for removing tetranitromethane from nitric acid |
| 12/31/1996 | CA2180235A1 Process and device for the preparation of a flow which is substantially purified with respect to at least one of the impurities oxygen and carbon monoxide |
| 12/27/1996 | EP0749940A1 Process for the preparation of aluminium nitride whiskers |
| 12/25/1996 | CN1138555A K, Na, Ca and Mg nitrate solution evaporation and concentrating method |
| 12/24/1996 | US5587134 Low temperature oxidation |
| 12/24/1996 | CA2047650C Process for the recovery of titanium values |
| 12/24/1996 | CA2012607C Azide gas generating composition for inflatable devices |
| 12/20/1996 | CA2179345A1 Process for producing aluminum nitride trichites |
| 12/18/1996 | EP0748763A1 Integrated natural gas conversion and air separation |
| 12/18/1996 | CN1138353A Material of chemical compounds with a metal in group IVA of the periodic system, nitrogen and oxygen and process for producing it |
| 12/18/1996 | CN1033573C Process for the preparation and purification of a hydroxylammonium salt solution |
| 12/17/1996 | US5585084 Silicon nitride powder |
| 12/17/1996 | US5584912 High micropore volume low silica EMT-containing metallosilicates |
| 12/17/1996 | CA2025365C Methods of preserving, storing, and using hydroxylamine production catalyst |
| 12/12/1996 | DE19520396A1 Amido-sulphinic acid prepn. in aq. medium by simple method |
| 12/11/1996 | CN1137486A Process for removal of impurity contained in composite gas |
| 12/11/1996 | CN1033500C Continuous process for prearing silicon nitride and silicon nitride prepared |
| 12/10/1996 | US5582861 Method for repair of coatings on carbon - carbon composites |
| 12/10/1996 | US5582810 Removal of nitrous oxide from gaseous effluents comprised thereof |
| 12/10/1996 | US5582034 Reflux for distillation column is produced by condensation of stream of nitrogen-rich vapor through indirect heat exchange with liquid stream extracted from distillation column |
| 12/10/1996 | US5582030 From compressed air |
| 12/05/1996 | DE19528188C1 Oxygen generation by pressure swing adsorption |
| 12/04/1996 | EP0745699A1 Multilayer coating of a nitride-containing compound and method for producing it |
| 12/04/1996 | EP0582571B1 Process for preparing aluminium nitride powder via controlled combustion nitridation |
| 11/27/1996 | EP0744768A1 Device comprising films of beta-C3N4 |
| 11/27/1996 | EP0744377A1 Sulfur recovery enhanced by oxygenenriched gas supplied by gas separation membranes |
| 11/27/1996 | CN1136801A Reactor container, plant and process for production of sulfuric acid |
| 11/27/1996 | CA2177299A1 Sulfur recovery enhanced by oxygen-enriched gas supplied by gas separation membranes |
| 11/14/1996 | WO1996035640A1 Carbon nitride cold cathode |
| 11/14/1996 | WO1996035510A1 Carbides and nitrides of transition elements with controlled porosity |
| 11/14/1996 | DE19543102C1 Gold-free mesh, esp. recovery mesh for ammonia oxidn. to nitric acid |
| 11/14/1996 | CA2219797A1 Carbides and nitrides of transition elements with controlled porosity |
| 11/13/1996 | EP0741667A1 Production of no from n 2?o |
| 11/13/1996 | EP0636108B1 Method for aqueous processing of aluminum nitride and compositions therefrom |
| 11/13/1996 | CN1135370A Pressure-changing absorption method for gas in circulating space |
| 11/12/1996 | US5573745 For adsorbtively separating nitrogen from oxygen |
| 11/12/1996 | US5573742 From alkylaluminum and ammonia, deposited on graphite substrate, antenna windows |
| 11/12/1996 | US5573689 Fluidized bed reactor for preparing metal nitride |
| 11/12/1996 | CA2050701C Modified carbon molecular sieve adsorbents |
| 10/31/1996 | WO1996033801A1 Carbonaceous adsorbent, process for producing the same, and method and apparatus for gas separation |
| 10/30/1996 | EP0739228A1 Recycling of wafer cleaning substances |
| 10/30/1996 | CN1134404A Preparation method of alpha-Si3N4 whisker |
| 10/30/1996 | CN1134367A Golden ornament and its producing method |
| 10/30/1996 | CN1134316A Directly high-temp sintered hydrocarbon conversion catalyst |
| 10/29/1996 | US5569633 Ion transport membranes with catalyzed dense layer |
| 10/29/1996 | US5569322 Coloring material red with tantalum nitride pigment prepared by nitriding hydrated tantalum oxide with dry ammonia |
| 10/22/1996 | US5568653 Method of producing a sintered carbonitride alloy for semifinishing machining |
| 10/22/1996 | US5567407 Containing aluminum, boron, and-or gallium |