Patents
Patents for C01B 21 - Nitrogen; Compounds thereof (10,781)
04/1992
04/16/1992DE4133595A1 Gas generating material prodn. for inflating passenger restraint bag - by precipitating metal azide on metal oxide particles by cooling hot soln.
04/15/1992EP0480225A1 Polymer precursors for aluminum nitride
04/15/1992CN1060225A Novel pressurization psa systems for production of high purity product gas
04/15/1992CN1016268B Process for producing high-purity nitrogen
04/14/1992US5104466 Nitrogen gas generator
04/14/1992US5104426 Pressure swing adsorption
04/11/1992CA2027293A1 Method for obtaining a powdered refractory material and a reactor for carrying out the method
04/10/1992CA2045002A1 Polymer precursors for aluminum nitride
04/08/1992EP0479354A1 Nitrided silica
04/08/1992EP0479050A1 Silicon diimide, process for its preparation and for the preparation of silicon nitride obtained therefrom
04/08/1992CN1060079A Process for producing industrial nitrogen
04/07/1992US5102646 Producing an intermediate of reducing meta carbides and reacting with a refractory metal halide
04/07/1992US5102432 Third stage permeate recycled to second stage; membrane surface area distributed between stages; high purity product
04/07/1992CA1298580C ¬¬¬(3-pyridinyl)methylen|amino|oxy|alkanoic acids and esters
04/07/1992CA1298577C Manufacture of catalyst supports
04/03/1992CA2052401A1 Silicon diimide, a process for it's preparation and silicon nitride obtained therefrom
04/01/1992EP0477830A1 Process for the preparation of alpha silicon nitride powder
03/1992
03/31/1992US5100846 Reaction of aluminum oxide, carbon and nitrogen; mechanical abrasion of resulting pellets
03/31/1992US5100845 Process for producing titanium diboride and boron nitride powders
03/31/1992US5100635 Multistage, oxidation, reduction, cryogenic distillation, purification
03/31/1992US5100630 Water powered magneto generator for the production of nitrogen and phosphorus fertilizer apparatus
03/31/1992CA1298319C Process for the preparation of sialon products
03/31/1992CA1298065C Processing nitrogen-rich, hydrogen-rich, and olefin- rich gases with physical solvents
03/27/1992CA2052103A1 Process for the production of alpha-silicon nitride powder
03/25/1992EP0476825A1 A process for the synthesis of hard boron nitride
03/24/1992US5098880 Forming carbon on a molecular sieve support to use as an adsorbent for gases such as nitrogen and oxygen
03/24/1992US5098597 Continuous process for the production of azide salts
03/18/1992EP0475591A1 Systems for the production of high purity gas
03/18/1992EP0475129A1 Process for the preparation of cyanamide
03/18/1992EP0474972A1 Catalytic net preparation process, the catalytic net and use thereof
03/18/1992EP0440604A4 Devices and method for cleaning gases
03/11/1992EP0474106A2 Process for making modified carbon molecular sieves for gas separation
03/11/1992CN1059368A Method of preparing nitrogen-group controllable atmosphere used for metal thermal treatment
03/11/1992CN1059294A Carbon dioxide production from combustion exhaust gases with nitrogen and argon by-product recovery
03/10/1992CA1297046C Nitrogen adsorption process
03/04/1992EP0473093A2 Process for the production of nitrogen from air by membrane separation
03/04/1992EP0472776A2 Aluminum nitride powder, sintered body and production thereof
03/04/1992CN1059130A Improved membrane / deoxo control method and system
03/03/1992US5093096 From polycarbosilanes or polysilazanes
03/03/1992CA1296831C Infusible preceramic silazane polymers via ultraviolet irradiation
03/01/1992WO1992004276A1 Nitrogen atmospheres
03/01/1992CA2087599A1 Nitrogen atmospheres
02/1992
02/26/1992CN1058920A Improved air spration pressure swing adsorption process
02/22/1992CA2049414A1 Process for the production of cyanamide
02/20/1992WO1992002452A1 Process of and apparatus for preparing dinitrogen pentoxide
02/20/1992WO1992002299A1 Process for improving the physical and catalytic properties of fluid cracking catalysts
02/19/1992EP0471494A1 Process for making an azide gas generant.
02/19/1992EP0471213A2 Improved membrane/deoxo control method and system
02/18/1992CA1295812C Method for removing and using nitrogen oxides from fumes
02/11/1992US5087593 Preparation of titanium nitride from organometallic precursors
02/08/1992CA2048432A1 Nitrogen production apparatus
02/07/1992CA2042754A1 Enchanced thermal and ignition stability azide gas generant, and process and apparatus for making
02/06/1992WO1992001740A1 Preparing nitridable silicon-containing material, resulting material
02/06/1992WO1992001654A1 Preparing silicon nitride with densification aid, and results
02/06/1992WO1992001653A1 Process for making silicon nitride articles
02/06/1992WO1992001652A1 Preparing alpha-phase silicon nitride, converting to beta-phase
02/06/1992WO1992001650A1 Process for nitriding silicon-containing materials
02/06/1992WO1992001647A1 Ceramic phase in silicon nitride containing cerium
02/05/1992WO1992002451A1 Method of extracting dinitrogen pentoxide from its mixture with nitric acid
02/05/1992EP0469781A2 Separation of carbon dioxide and nitrogen from combustion exhaust gas with nitrogen and argon by-product recovery
02/05/1992CA2066030A1 Method of extracting dinitrogen pentoxide from its mixture with nitric acid
02/04/1992US5086033 Pyrlysis of carbon containing compound to narrow pore size by deposition
02/01/1992WO1992002301A1 Improvements in or relating to catalysts and getter systems
02/01/1992WO1992002300A1 Improvements in or relating to self-gettering catalysts
02/01/1992CA2088150A1 Catalysts and getter systems
02/01/1992CA2088149A1 Self-gettering catalysts
01/1992
01/30/1992DE4124547A1 Selective extn. of titanium as tetra:chloride
01/29/1992EP0468317A2 Method for the preparation of magnetic material based an the Sm-Fe-N substance system
01/29/1992CN1058194A Method and apparatus for producing silicon nitride powder by laser
01/28/1992US5084075 Vacuum swing adsorption process for production of 95+% n2 from ambient air
01/24/1992CA2047518A1 Membrane/deoxo control method and system
01/23/1992WO1992000982A1 Process for the preparation of transition metal nitrido complexes
01/22/1992EP0467539A2 Process for forming ceramics
01/22/1992EP0467192A1 Platinum catalysts on graphite supports and use thereof
01/22/1992EP0467176A1 Process for regenerating inactive and poisoned platinum catalyst
01/22/1992EP0467174A1 Platinum catalysts on graphite supports and use thereof
01/22/1992CN1058091A Boron nitride crucible and process for producing
01/21/1992US5082872 Surface properties
01/21/1992US5082693 Precursors for boron nitride ceramic coatings
01/21/1992US5082642 Method for catalyzing oxidation/reduction reactions of simple molecules
01/21/1992US5082474 Pressurization psa systems for the production of high purity product gas
01/20/1992CA2045855A1 Process for forming ceramics
01/16/1992DE4022210A1 Silicon nitride powder with uniformly dispersed sintering agent - made by spraying liq. mixt. of silicon halide and halide or alcoholate of titanium, zirconium etc.
01/16/1992DE4021208A1 Pure fine aluminium nitride powder prodn. - by precipitating hardly soluble salt from aluminium salt and phenol or aromatic acid in aq. alkaline medium and pyrolysis
01/15/1992EP0465982A1 Process for the continuous production of sodium azide
01/15/1992CN1057817A Improved membrane nitrogen process and system
01/14/1992US5081078 Sinterable ceramic powder, process for its preparation, silicon nitride ceramic manufactured therefrom, process for its manufacture and its use
01/09/1992WO1992000242A1 A continuous process for the production of azide salts
01/08/1992EP0464396A1 Carbonitride alloys based on the transition metals (M, M*, M**) of groups 4 (M), 5 (M*) and 6 (M**) of the periodic table of elements, process for their production and an application for the carbonitride alloys
01/08/1992EP0464369A1 Process for the preparation of aluminium nitride
01/07/1992US5079198 Ceramic phase in sintered silicon nitride containing cerium, aluminum, and iron
01/07/1992CA2046385A1 Process for the continuous production of sodium azide
01/07/1992CA1293849C Nitriding process of refractory oxides
01/02/1992DE4020914A1 Gas purificn. by converting ammonia to nitrogen using catalyst - contg. noble metal and transition metal oxide e.g. for purifying waste gas from soda mfr.
12/1991
12/31/1991US5077029 Air separation into high purity nitrogen with low residual oxy gen; catalytic hydrogenation of oxygen to water; computerized analysis and control
12/31/1991CA2045979A1 Process for producing aluminum nitride
12/27/1991EP0462778A1 Pressure swing adsorption method for separating gaseous mixtures
12/27/1991EP0462216A1 Process for improving the physical and catalytic properties of a fluid cracking catalyst
12/24/1991US5075266 Process for the production of ceramic material containing silicon nitride from polymeric hydridochlorosilazanes
12/24/1991US5075265 Pyrolysis
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