Patents
Patents for C01B 21 - Nitrogen; Compounds thereof (10,781)
08/1992
08/20/1992CA2103896A1 Production of metal and metalloid nitrides
08/18/1992US5139825 Exposing heated substrate to mixed vapors containing ammonia and volatile transition metal amines
08/18/1992US5139632 Recovery of mixed acids from mixed salts
08/18/1992CA1306422C Modular, shell-less, air permeator
08/18/1992CA1306341C Process for the reduction of nitrogen oxides in an effluent
08/11/1992US5138111 Eta phase materials, methods of producing the same, and use thereof as catalysts for alcohol synthesis, hydrocarbon synthesis, hydrocarbon hydrogenation and hydrocarbon conversion reactions
08/11/1992US5138079 Reacting oligohydridoorganylsilazane with chlorosilanes
08/11/1992US5137772 Body coated with cubic boron nitride and method for manufacturing the same
08/06/1992WO1992012943A1 Rapid solid-state synthesis of refractory materials
08/05/1992WO1992013802A1 Process of removing nitrite from a silver nitrate solution
08/05/1992EP0497003A2 Use of helium and argon diluent gases in modification of carbon molecular sieves
08/05/1992CN1017725B Method for preparing nitrogen group protecting atmosphere by direct reaction
08/04/1992US5135894 Particulate ceramics materials and production thereof
08/04/1992US5135756 Process for improving the physical and catalytic properties of a fluid cracking catalyst
08/04/1992US5135548 Adsorptive separation of nitrogen from oxygen using carbon molecular sieve and water soprtion agent
07/1992
07/31/1992WO1992013628A2 Gas separations utilizing glassy polymer membranes at sub-ambient temperatures
07/31/1992CA2078448A1 Gas separations utilizing glassy polymer membranes at sub-ambient temperatures
07/29/1992CN1063053A Three-stage membrane gas spearation process and system
07/29/1992CN1017609B Process for prepn. of high content of alpha-phase silicon nitride
07/22/1992CN1062902A Preparation of hydrazing hydrate using sylvine oxygenant
07/21/1992US5132389 Polycondensation of impure P2 NOCl5 into uncrosslinked poly(dichlorophosphazenes) in the presence of PCl5
07/21/1992US5132246 Process for using dross residues to produce refractory products
07/14/1992US5130549 Method of detecting or measuring nuclear radiation
07/14/1992CA1304914C Reduction of nitrogen- and carbon-based pollutants through the use of urea solutions
07/09/1992WO1992011396A1 Method of producing a sintered carbonitride alloy for intermittent machining of materials difficult to machine
07/09/1992WO1992011395A1 Method of producing a sintered carbonitride alloy for fine to medium milling
07/09/1992WO1992011394A1 Method of producing a sintered carbonitride alloy for semifinishing machining
07/09/1992WO1992011392A1 Method of producing a sintered carbonitride alloy for fine milling
07/08/1992EP0494129A1 Direct nitridation process of metals having a low melting point
07/08/1992EP0494128A1 Oxynitride based product for covering screened electrical resistors and for refractory application and method of making same
07/07/1992US5128112 Low temperature decomposition of organometallic intermediate
07/07/1992US5128001 Method of separating electrochemically produced dinitrogen pentoxide from its solution in nitric acid
07/04/1992CA2058701A1 Lining product for shielded electrical resistance and mixed oxynitride-based refractory application and production process
07/04/1992CA2058521A1 Use of helium and argon diluent gases in modification of carbon molecular sieves
07/01/1992EP0493148A1 Composite material with refractory fibrous reinforcement and its process of production
07/01/1992EP0492161A2 Cubic boron nitride/cubic boron nitride composite masses and their preparation
07/01/1992EP0492079A1 Process for the preparation of spherical amorphous silicon nitride
07/01/1992CN1017236B Improved mambrane separation system and process
06/1992
06/30/1992US5126121 Process for preparing aluminum nitride powder via controlled combustion nitridation
06/24/1992CN1017165B Process for production or recovery of acids from metalliferous solutims of such acid
06/23/1992US5124138 Work-up of aqueous mother liquors containing hydrochloric acid, sulfuric acid and their hydroxyl-ammonium and ammonium salts
06/23/1992CA1304067C Ammonia oxidation catalyst pack
06/21/1992CA2056497A1 Cbn/cbn composite masses and their preparation
06/17/1992EP0490614A1 Preparation of titanium nitride from organometallic precursors
06/17/1992EP0490480A1 Preparation of aluminum oxynitride from organosiloxydihaloalanes
06/17/1992EP0490322A1 Three-stage membrane gas separation process and system
06/17/1992EP0393029B1 Processing nitrogen-rich, hydrogen-rich, and olefin-rich gases with physical solvents
06/17/1992EP0304480B1 Process for the reduction of nitrogen oxides in an effluent using sugar
06/16/1992US5122505 Carbonate-free inorganic nitrates or oxides and process thereof
06/16/1992US5122497 Catalyst for ammonia oxidation
06/16/1992US5122355 For dry, high purity nitrogen obtained by separation from air
06/11/1992CA2057253A1 Three stage membrane gas separation process and system
06/11/1992CA2052967A1 Preparation of titanium nitride from organometallic precursors
06/11/1992CA2052889A1 Preparation of aluminum oxynitride from organosiloxydihaloalanes
06/10/1992CN1016960B Process and apparatus for removing oxides of nitrogen and sulfur from combustion gases
06/09/1992US5120699 Platinum-on-graphite catalysts and the use thereof
06/09/1992US5120689 Metallic or non-metallic oxide in matrix of carbon
06/09/1992US5120508 Converting portion of nitrogen monoxide to nitrogen dioxide
06/09/1992CA1303283C Polysilacyclobutasilazanes
06/03/1992EP0488180A2 Electrically responsive light controlling device
06/03/1992EP0487728A1 Process for manufacturing powdery aluminum nitride coated on the surface with oxide, oxynitride or nitride of yttrium.
06/03/1992EP0487690A1 Method of forming dinitramide salts
06/02/1992US5118488 Process for making whiskers, fibers and flakes of transition metal compounds
06/02/1992CA1302050C Method of reducing the emission of no _gas from a liquid containing nitric acid
06/02/1992CA1302046C Process for producing shaped boron nitride product
05/1992
05/29/1992WO1992008560A1 Method of making pressure-molded product from aluminum powder
05/29/1992CA2056182A1 Composite material with a refractory fibrous reinforcement and its production process
05/26/1992US5116679 Process for producing fibres composed of or coated with carbides or nitrides
05/26/1992CA1301430C Method for production of high purity aluminum nitrides
05/20/1992EP0486384A1 Industrial adsorbents comprising X-type zeolites with low silica content for the non cryogenic separation of air gases and process for their preparation
05/20/1992EP0433324B1 Process for recovering nitrogen from gaseous mixtures containing oxygen and nitrogen by alternating pressure adsorption on carbon molecular sieves
05/19/1992US5114887 Process for preparing oxynitride ceramic fibers
05/19/1992US5114695 Process of producing aluminum and titanium nitrides
05/19/1992US5114693 Process for the production of silicon nitride and product made according to the process
05/19/1992US5114440 Separation of oxygen from air
05/13/1992EP0216932B1 Rhombohedral polycrystalline boron nitride and process for its production
05/13/1992CN1061046A Method for obtaining powdered refractory material and reactor for carrying out method
05/12/1992US5112587 Catalytic oxidation of combustion gases with hydrogen peroxide
05/12/1992US5112579 Continuous carbothermal reactor
05/12/1992CA1300346C Superpurifier for nitrogen and process for purifying same
05/07/1992DE4035205A1 Waste gas purificn. - by oxidative scrubbing using hydrogen per:oxide to remove nitrogen oxide(s), heavy metals and organic cpds.
05/07/1992DE4034752A1 Single stage scrubber for chemical treatment of multiple toxic species in a gas stream - for oxidative treatment of incinerator and smelter flue gases
05/06/1992CN1060792A Pressure swing adsorption method for separating gaseous mixtures
05/05/1992US5110773 Carbo-thermal reduction of pre-mullite in nitrogen
05/05/1992US5110768 Rapid solid-state synthesis of refractory materials
05/05/1992US5110575 Process for producing sinterable crystalline aluminum nitride powder
05/05/1992US5110569 Low temperature purification of gases
05/05/1992US5110565 Apparatus for producing uniform, fine ceramic powder
05/05/1992CA1300039C Pressure swing adsorption process and apparatus
04/1992
04/30/1992WO1992006921A1 Synthetic porous crystalline material, its synthesis and use
04/29/1992EP0482222A1 Method for the separation of nitrogen and carbon dioxide and concentration of the latter in energysupplying oxydation- and combustion processes
04/28/1992US5108967 Process for producing nonequiaxed silicon aluminum oxynitride
04/28/1992US5108730 Low temperatue light off ammonia oxidation
04/28/1992US5108713 Apparatus for the continuous production of high ultra-fine, aluminum nitride powder by the carbo-nitridization of alumina
04/28/1992US5108467 Process for at least partially separating a gaseous component from a mixture of gaseous components
04/22/1992EP0481563A1 Process for preparing fine aluminium nitride powder.
04/22/1992EP0481218A1 A process for making modified carbon molecular sieve adsorbents
04/21/1992US5106792 Conversion from hexagonal to cubic structure with high pressure and temperature
04/21/1992US5106602 Low temperature catalytic reduction of nitrogen oxides
04/16/1992WO1992006037A1 Carbonate-free inorganic nitrates or oxides and process thereof
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