Patents
Patents for C01B 21 - Nitrogen; Compounds thereof (10,781)
01/1994
01/26/1994CN1081122A Catalyst for ammonia catalytic oxo-synthesis of hydrazine hydrate
01/25/1994US5281311 Neutralization of a solution of hydroxylamine salt and acid, electrolysis, oxidation and reduction
01/23/1994CA2100922A1 Process and means for the oxidative destruction of azides
01/20/1994WO1994001512A1 Azeotropic compositions of perfluoroethane, and trifluoromethane, or oxide, or nitrous oxide, or carbon dioxide, or fluoromethane
01/20/1994WO1994001362A1 Process for making high purity hydroxylammonium nitrate
01/20/1994CA2115453A1 Process for making high purity hydroxylammonium nitrate
01/19/1994EP0578887A1 Method of manufacturing intercalation compounds
01/19/1994EP0453546B1 Method of separating dinitrogen pentoxide from its solution in nitric acid
01/18/1994US5279808 Metal nitride powders
01/18/1994CA2081438A1 Method of manufacturing intercalation compounds
01/18/1994CA1326121C Low temperature light off ammonia oxidation
01/12/1994CN1023471C Process for producing nitrogen
01/11/1994US5278124 Low pressure drop, high surface area ammonia oxidation catalyst
01/11/1994CA1325878C Nitric acid concentration
01/11/1994CA1325876C Mobile atom insertion reaction, mobile atom transmissive membrane for carrying out the reaction and reactor incorporating the mobile atom transmissive membrane
01/05/1994EP0577213A1 Process for the preparation and purification of a hydroxylammonium salt solution
01/05/1994EP0577100A1 Process for reducing the acid content of hydroxylamine salt solutions and for preparing hydroxylamines from hydroxylamine salts
01/05/1994EP0576975A1 Phosphonitride chloride compositions and preparation method
01/05/1994EP0576540A1 Moving bed process for carbothermally synthesizing nonoxide ceramic powders.
01/04/1994US5276105 Polymer precursors for aluminum nitride
01/04/1994US5275738 Filter device for acids and process for filtering inorganic acids
01/04/1994US5275640 Operating absorbers alternately
01/02/1994CA2094758A1 Process for reducing the acid content of hydroxylamine salt solutions and for preparing hydroxylamines from hydroxylamine salts
12/1993
12/29/1993EP0576254A2 Reactive non-metallic product recovered from dross
12/28/1993US5273699 Moisture-resistant aluminum nitride powder and methods of making and using
12/23/1993WO1993025496A1 Method of making moisture resistant aluminum nitride powder and powder produced thereby
12/23/1993WO1993025471A1 Process for producing high purity hydroxylammonium nitrate
12/23/1993DE4300463A1 Prepn. of carbamic acid in aq. soln. useful as plant nutrient or for healing wounds - by reacting gaseous carbon di:oxide and nitrogen@ with mixed liq. phase catalyst then hydrolysing prod. in water bath
12/23/1993CA2098776A1 Reactive non-metallic product recovered from dross
12/22/1993EP0574989A1 Process for the preparation and processing of a hydroxylammonium salt solution
12/22/1993EP0574440A1 Production of metal and metalloid nitrides
12/15/1993EP0521087B1 Process for the treatment of an aqueous solution containing mainly nitric and hydrofluoric acids
12/15/1993CN1079443A High pure nitrogen generator
12/15/1993CN1023104C Improved method and equipment for producing dry, high purity nitrogen
12/15/1993CN1023103C Dry high purity nitrogen production process and system
12/14/1993CA1325182C Pressure swing adsorption process
12/09/1993WO1993024229A1 Foraminous sheets for use in catalysis
12/09/1993WO1993024219A1 Fluidized bed reaction pipe with gas distributor, and its use
12/09/1993CA2137083A1 Foraminous sheets for use in catalysis
12/08/1993EP0572788A1 Submicron carbonitride powder, process for the preparation thereof and application
12/08/1993EP0572634A1 Combined adjustable-flow rate nitrogen and oxygen production method.
12/07/1993US5268157 Kniting wires of noble metal alloys
12/01/1993EP0571997A1 Moisture removal from a wet gas
12/01/1993EP0571914A1 Method to work cubic boron nitride article
12/01/1993CN1079005A Submicron carbonitride powders, a process for their production and their use
11/1993
11/30/1993US5266535 Process for the production of sintering-active Si3 N4 powders
11/30/1993US5266293 Knit fabric, oxidation catalyst
11/30/1993US5266292 Ozone carrier gas
11/30/1993US5266291 Packed bed arrangement for oxidation reaction system
11/30/1993US5266290 Process for making high purity hydroxylammonium nitrate
11/30/1993US5266101 Mixing high and low purity nitrogen
11/30/1993CA2096927A1 Moisture removal from a wet gas
11/25/1993WO1993023160A1 An improved catalyst for the production of nitric acid by oxidation of ammonia
11/24/1993EP0571251A1 Rotary-drum furnace for chemical reactions
11/23/1993US5264198 Method for production of spacecraft-grade N2 O4
11/23/1993US5264123 Acid recycling system
11/18/1993EP0569765A1 Apparatus for manufacturing fine metal and ceramic powder
11/18/1993EP0540689A4 Process for nitriding silicon-containing materials
11/18/1993EP0540683A4 Process for making silicon nitride articles
11/18/1993EP0540671A4 Preparing silicon nitride with densification aid, and results
11/18/1993EP0433398B1 Boron nitride of high hardness
11/11/1993DE4214719A1 Metallic and/or ceramic powders - produced by gas phase reaction (CVR) of metallic cpds. plus other named reactants in tubular reactor have narrow, predetermined size range and high purity
11/10/1993EP0569310A1 Installation for air liquefaction separation and process therefor
11/10/1993EP0568861A1 Finely divided non-oxide ceramic powders
11/09/1993US5260397 Thermoset polymeric precursor for aluminum nitride
11/09/1993US5259934 Direct current, electrolysis cell
11/09/1993CA1323976C Production of ceramic materials by pyrolyzing the reaction mixture containing an aluminum compound
11/03/1993CN2145180Y Ammonia oxidation for nitric acid manufacture
11/02/1993US5258169 High pressure ammoniation of organylaminosilane
10/1993
10/28/1993WO1993021108A1 Method for aqueous processing of aluminum nitride and compositions therefrom
10/27/1993CN1022577C Method of preparing nitrogen-based controllable atmosphere used for metal thermal treatment
10/26/1993US5256387 Catalyst for the production of nitric acid by oxidation of ammonia
10/26/1993US5256331 Water-in-oil emulsions containing hydroxylamine
10/26/1993CA1323485C Catalytic process for making compounds having a non-lewis acid/base group iiia metal to group va nonmetal bond
10/20/1993EP0574440A4 Production of metal and metalloid nitrides.
10/20/1993EP0566459A1 Reagent and catalytic process for cleaving protected functional groups
10/19/1993US5254324 Dinitramide salts and method of making same
10/16/1993CA2093989A1 Reagent and catalytic process for clearing a protected function
10/14/1993WO1993020022A1 Process for producing carbonaceous composition
10/14/1993WO1993014027A3 Process for preparing ultrafine aluminum nitride powder
10/12/1993US5252248 Comminuting a slurry of silicon powder and water
10/06/1993EP0563205A1 Method of producing a sintered carbonitride alloy for semifinishing machining.
10/06/1993EP0563204A1 Method of producing a sintered carbonitride alloy for fine milling.
10/06/1993EP0563203A1 Method of producing a sintered carbonitride alloy for intermittent machining of materials difficult to machine.
10/06/1993EP0563182A1 Method of producing a sintered carbonitride alloy for fine to medium milling.
10/05/1993US5250550 Complexes of nitric oxide with polyamines
10/05/1993US5250278 Combustion of fuel and oxygen to produce silicon carbide, and of silicon carbide and nitrogen to produce silicon nitride
10/05/1993CA1322655C Crash bag propellant composition and method for generating nitrogen gas
09/1993
09/29/1993EP0562567A1 Ammonia oxidation catalyst
09/29/1993EP0562400A1 A sliding member, a method for producing same, and usages of same
09/29/1993EP0562248A1 Polymer precursor for silicon carbide/aluminum nitride ceramics
09/28/1993US5248490 Process for the preparation of silicon nitride having a small crystallite size
09/28/1993US5248483 Apparatus and methods for producing ceramic products
09/28/1993CA1322443C Semi-permeable membranes comprising predominantly of polycarbonates derived from tetrahalobisphenols
09/22/1993EP0561340A1 Process for separating nitrogen gas
09/21/1993US5246683 Process for producing small particles of aluminum nitride and particles so-produced
09/17/1993EP0572634A4 Combined adjustable-flow rate nitrogen and oxygen production method.
09/15/1993EP0560258A2 Reaction injection molding of silicon nitride ceramics having crystallized grain boundary phases
09/15/1993EP0560005A1 Process for the preparation of silicon nitride, starting material therefor and process for its preparation
09/15/1993CN1076269A Process and apparatus for separating air
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