| Patents for C01B 21 - Nitrogen; Compounds thereof (10,781) |
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| 07/31/1997 | WO1997026981A1 Vacuum-pressure alternating adsorption process and device |
| 07/30/1997 | EP0785818A1 Multiple stage semi-permeable membrane gas separation process |
| 07/29/1997 | US5652061 Devices comprising films of β-C3 N4 |
| 07/29/1997 | US5651951 Reacting ammonia-free, aqueous hydroxylamine solution with nitric acid to form salt |
| 07/24/1997 | WO1997026312A1 Rare earth borate and its precursor, preparation processes and use of borate as luminophore |
| 07/23/1997 | EP0785170A1 Process for the purification of a solution of lithium salts contaminated with metallic cations and use of that process in the production of lithium-exchanged zeolites |
| 07/23/1997 | EP0784593A1 Method of producing hydroxylamines from ammonia or the associated amines, hydrogen and oxygen |
| 07/23/1997 | EP0625964B1 Process for preparing an amorphous, extra-hard material based on boron nitride |
| 07/22/1997 | US5650127 Removal of nitrogen oxides from turbine exhaust gas by catalytic oxidation with platinum |
| 07/22/1997 | US5649995 Nitrogen generation control systems and methods for controlling oxygen content in containers for perishable goods |
| 07/17/1997 | WO1997025273A1 Low compressibility carbon nitrides |
| 07/16/1997 | EP0756580A4 Method and apparatus for producing nanostructured ceramic powders and whiskers |
| 07/16/1997 | CN1035428C nitrogen deoxygen purifying method |
| 07/15/1997 | US5649278 Igniting at low gaseous nitrogen pressures |
| 07/15/1997 | US5648028 Method of manufacturing a sintered composite body of silicon nitride and silicon carbide |
| 07/09/1997 | EP0782542A1 Method of nitriding silicon |
| 07/08/1997 | US5646078 Aluminum nitride powder |
| 07/01/1997 | US5643843 Silicon nitride/silicon carbide composite densified materials prepared using composite powders |
| 06/26/1997 | WO1997022551A1 Process for producing aqueous solutions of free hydroxylamine |
| 06/26/1997 | WO1997022550A1 Process for separating medium boiling substances from a mixture of low, medium and high boiling substances |
| 06/26/1997 | WO1997022549A1 Stabilised hydroxylamine solutions |
| 06/26/1997 | DE19547759A1 Stabilisierte Hydroxylaminlösungen A stabilized hydroxylamine |
| 06/25/1997 | EP0779881A1 Boron nitride |
| 06/24/1997 | US5641434 Provides water based slurry with low viscosity and high powder concentration, powder has specific surface area |
| 06/19/1997 | WO1997022126A1 Method for recovering nitrate ions as nitric acid from nuclear industry effluents |
| 06/19/1997 | DE19651731A1 Nitrogen containing hydro:silicon compound, for silicon nitride ceramics |
| 06/18/1997 | EP0778812A1 Process for producing ceramic powders, especially titanium dioxide useful as a photocatalyst |
| 06/18/1997 | EP0540683B1 Process for making silicon nitride articles |
| 06/18/1997 | EP0540643B1 Ceramic phase in silicon nitride containing cerium |
| 06/18/1997 | EP0540642B1 Preparing alpha-phase silicon nitride, converting to beta-phase |
| 06/18/1997 | CN1152108A Air separation method and apparatus for producing nitrogen |
| 06/18/1997 | CN1035168C Method for continuously preparation aluminum nitride by carbonitriding of aluminum oxide with movable bed reactor |
| 06/17/1997 | US5639706 Catalyst obtained by treating platinum metal salt with finely divided elemental sulfur, reducing salt to metallic platinum |
| 06/17/1997 | US5638698 Cryogenic system for producing nitrogen |
| 06/11/1997 | EP0778082A1 Apparatus for the treatment of at least one fluid and the use thereof in the separation of at least one constituent from a gaseous mixture |
| 06/11/1997 | EP0778069A1 Reactive purge for solid electrolyte membrane gas separation |
| 06/11/1997 | EP0777550A2 Nanoscale particles, and uses for same |
| 06/11/1997 | CN1151330A Process for adsorption of nitrogen from gas mixtures using pressure-swing adsorption with zeolites |
| 06/10/1997 | US5637285 Process for nitrogen trifluoride synthesis |
| 06/10/1997 | CA2108861C Packed bed arrangement useful for mixing and/or oxidation |
| 06/06/1997 | CA2192031A1 Plant for treating at least one fluid and use for the separation of at least one constituent of a gas mixture |
| 06/05/1997 | WO1997019892A1 Nitric acid production and recycle |
| 06/04/1997 | EP0776699A1 Preparation of a hydrogenation catalyst using M(OR)mXn |
| 06/04/1997 | EP0696228B1 A method for converting ammonia in a gas stream to nitrogen |
| 06/04/1997 | CN1035042C Process for production of gas-permeable nets of noble metals for catalytic processes |
| 06/03/1997 | US5635541 Natural gas oxidized to produce synthesis gas which is reacted to produce hydrocarbons; steam produced generates work |
| 05/30/1997 | CA2191360A1 Preparation of a hydrogenation catalyst using m(or)mxn |
| 05/29/1997 | WO1997019454A1 Separation of gases |
| 05/29/1997 | CA2206453A1 Separation of gases |
| 05/28/1997 | EP0775760A1 Process and apparatus for producing and/or recovering acids from metalliferous solutions of these acids |
| 05/28/1997 | EP0668843B1 PROCESS FOR PLASMACHEMICAL TRANSFORMATION OF N2O INTO NOx AND/OR INTO DERIVATIVES THEREOF |
| 05/28/1997 | EP0540685B1 Preparing nitridable silicon-containing material, resulting material |
| 05/28/1997 | CA2191259A1 Process and plant for extraction or recovery of acids from solutions of these acids |
| 05/27/1997 | US5633214 Boron nitride-containing material and method thereof |
| 05/27/1997 | US5632866 Purification |
| 05/22/1997 | WO1997018341A1 Nanostructured feeds for thermal spray |
| 05/22/1997 | CA2237588A1 Nanostructured feeds for thermal spray |
| 05/21/1997 | EP0774298A1 Goldfree net made of nobel metal |
| 05/21/1997 | EP0719159B1 Method and means for generating nitric oxide |
| 05/21/1997 | CN1150413A Process and filter for producing NO2-free nitrogen monoxide with sulphurous polymers |
| 05/21/1997 | CN1150056A Process and device for preparation of flow which is ubstantially purified with respect to at least one of impurities oxygen and carbon monoxide |
| 05/15/1997 | DE19536777C1 Verfahren zur Herstellung eines Hydrierungskatalysators und seine Verwendung A process for preparing a hydrogenation catalyst and its use |
| 05/14/1997 | EP0773417A2 Air separation method and apparatus for producing nitrogen |
| 05/14/1997 | EP0773189A1 Process for the preparation of hydroxylammonium salts |
| 05/14/1997 | EP0773188A2 Magnetic field type oxygen enriched air producing apparatus |
| 05/14/1997 | EP0649453B1 Azeotropic compositions of perfluoroethane and trifluoromethane |
| 05/14/1997 | CN1149504A Process for absorption nitrogen from gas mixture by changing pressure absorption of zeolite |
| 05/14/1997 | CN1034860C Continuously preparation method of aluminium nitride through carbonitriding copermeation treatmement of aluminium oxide |
| 05/13/1997 | US5628894 Nitrogen trifluoride process |
| 05/13/1997 | CA2008645C Process for producing sinterable crystalline aluminum nitride powder |
| 05/09/1997 | WO1997016245A1 High surface area mesoporous desigel materials and methods for their fabrication |
| 05/07/1997 | CN1149049A Synthetic process of ketazine and synthetic process of hydrazine hydrate |
| 05/07/1997 | CN1149030A Radial reactor for preparing aluminum nitride powder |
| 05/06/1997 | US5627107 Blend of thermosetting resin and aluminum nitride particles |
| 05/06/1997 | US5626023 Cryogenic rectification system for fluorine compound recovery using additive liquid |
| 05/02/1997 | EP0769983A1 An in-situ crystallized zeolite containing composition (lai-isc) |
| 04/23/1997 | CN1148027A Prepn. process of hydrazine hydrate |
| 04/23/1997 | CN1034654C Method for making sinterable ceramic powder |
| 04/22/1997 | US5622750 Reacting aerosol of liquid droplets by passing through a flame to form particles, depositing on substrate, sintering, finishing |
| 04/16/1997 | EP0768389A1 Pyrolytic boron nitride compact and method of manufacture |
| 04/16/1997 | EP0768117A1 Carbonaceous adsorbent, process for producing the same, and method and apparatus for gas separation |
| 04/16/1997 | EP0529052B1 Gas separations utilizing glassy polymer membranes at sub-ambient temperatures |
| 04/10/1997 | WO1997012673A1 Process for preparing a hydrogenation catalyst |
| 04/10/1997 | CA2231536A1 Preparation of a hydrogenation catalyst |
| 04/09/1997 | EP0563203B1 Method of producing a sintered carbonitride alloy for intermittent machining of materials difficult to machine |
| 04/08/1997 | US5618475 Evaporator apparatus and method for making nanoparticles |
| 04/03/1997 | WO1997011768A1 Low temperature inert gas purifier |
| 04/02/1997 | EP0765924A2 Azeotropic compositions of perfluoroethane and trifluoromethane, or oxide or nitrous oxide, or carbon dioxide, or fluoromethane |
| 04/02/1997 | EP0765289A1 Process and filter for producing no 2?-free nitrogen monoxide with sulphurous polymers |
| 04/02/1997 | EP0652985B1 Wires incorporating a helical component, assemblies thereof, and use of said assemblies as catalyst and/or to recover precious metals |
| 04/02/1997 | CN1146375A Self-grind of silicon nitride |
| 04/01/1997 | US5616170 Adsorptive separation of nitrogen from other gases |
| 03/26/1997 | EP0651727B1 Manufacture of gas hydrates |
| 03/19/1997 | EP0763500A2 Process for the preparation of nitrogen-dioxide-free nitric oxide |
| 03/19/1997 | EP0762997A1 Ceramic production process |
| 03/18/1997 | US5612011 Process for the purification of inert gases |
| 03/18/1997 | CA2106350C Distillation strategies for the production of carbon monoxide-free nitrogen |
| 03/18/1997 | CA2070498C Cryogenic process for producing ultra high purity nitrogen |
| 03/13/1997 | DE19533715A1 Verfahren zum Entfernen von Stickstoffoxiden aus einem diese enthaltenden Gasstrom A process for removing nitrogen oxides from a gas stream comprising |
| 03/12/1997 | EP0761595A1 Preparation process of hydrazine hydrate |