| Patents for C01B 21 - Nitrogen; Compounds thereof (10,781) |
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| 06/15/1988 | CN87107018A Process for continuous production of high purity, ultra-fine, aluminium nitride power by carbo-nitridization of alumina |
| 06/14/1988 | US4751070 Low temperature synthesis |
| 06/14/1988 | US4751068 Method for catalyzing oxidation/reduction reactions of simple molecules |
| 06/07/1988 | US4749556 Process for producing boron nitride |
| 06/01/1988 | EP0269506A1 Process for the preparation of trichlorophosphazene phosphoryl dichloride from phosphorus pentachloride and ammonium chloride |
| 06/01/1988 | EP0268938A2 A lamina and a cosmetic comprising the same |
| 06/01/1988 | CN86107895A Process and apparatus for removing oxides of nitrogen and sulfur from combustion gases |
| 05/31/1988 | CA1237373A1 Molecular sieve type gas separation systems |
| 05/24/1988 | US4746671 Pharmaceutical use of [[[(3-pyridinyl)methylen]amino]oxy]alkanoic acids and esters |
| 05/24/1988 | US4746501 Process for preparing transition metal nitrides and transition metal carbonitrides and their reaction intermediates |
| 05/24/1988 | US4746332 Process for producing high purity nitrogen |
| 05/24/1988 | CA1236968A1 Metal borides, carbides, nitrides, silicides, oxide materials and their method of preparation |
| 05/17/1988 | US4745205 Novel preceramic polymers derived from cyclic silazanes and halogenated disilanes and a method for their preparation |
| 05/11/1988 | EP0267166A2 Method of reducing the emission of nitrogen oxides from a liquid containing nitric acid |
| 05/11/1988 | EP0266927A1 Process for the continuous production of high purity, ultrafine, aluminium nitride powder by the carbo-nitridisation of alumina |
| 05/11/1988 | EP0266918A2 A method for the preparation of preceramic polymers derived from cyclic silazanes and halosilanes |
| 05/11/1988 | EP0266912A2 Novel preceramic polymers derived from cyclic silazanes and halogenated disilanes and a method for their preparation |
| 05/11/1988 | EP0266745A2 Process for separating components of a gas stream |
| 05/11/1988 | EP0266417A1 REDUCTION OF NO x? IN FLUE GAS. |
| 05/04/1988 | EP0266187A2 Production of hydroxylamine nitrate by dialysis |
| 05/04/1988 | EP0266104A2 Production of ceramic materials |
| 05/04/1988 | EP0266059A2 Production of hydroxylamine nitrate by dialysis |
| 05/03/1988 | US4742143 Polysilazanes |
| 04/27/1988 | EP0264523A2 Method of separating gaseous mixture |
| 04/27/1988 | EP0264443A1 No reduction using sublimation of cyanuric acid |
| 04/27/1988 | EP0148833B1 Method of making yttrium silicon oxynitrides |
| 04/26/1988 | US4740574 Aluminum nitride structures |
| 04/21/1988 | WO1988002770A1 Method and apparatus to produce a hot fluidizing gas |
| 04/20/1988 | CN86108985A Rare earth cobaltic trioxide catalyzer for preparing nitric acid by ammonia oxidation |
| 04/19/1988 | CA1235385A1 Hard layer formed by incorporating nitrogen into mo or w metal and method for obtaining this layer |
| 04/12/1988 | US4737354 Preparation of hydroxylamine-O-sulfonic acid |
| 04/12/1988 | CA1234962A1 Manufacturing and using nitrogen fertilizer solutions on a farm |
| 04/06/1988 | EP0262914A1 Cross-linked organosilazane polymers |
| 04/05/1988 | CA1234680A1 Method of making a densified silicon nitride/oxynitride composite |
| 03/30/1988 | EP0261111A1 Pressure swing adsorption process and apparatus. |
| 03/29/1988 | US4734394 Process for producing molecular sieve carbon fibers |
| 03/29/1988 | US4734390 Nitrogen or oxnitrogen compounds having a perovskyte structure, their preparation and their application to the manufacture of dielectric components |
| 03/29/1988 | US4734273 Activated carbon bed |
| 03/29/1988 | US4733526 Separation of gas mixture |
| 03/24/1988 | WO1988002003A1 Catalytic process for making compounds having a non-lewis acid/base group iiia metal to group va nonmetal bond |
| 03/23/1988 | EP0260278A1 Nitrogen injection |
| 03/22/1988 | US4732746 Method of making high purity silicon nitride precursor |
| 03/16/1988 | EP0259966A1 Platinum coated filaments of platinum and rhodium; method of preparation and use in ammonia oxidation |
| 03/16/1988 | EP0259944A2 Infusible preceramic silazane polymers via ultraviolet irradiation |
| 03/16/1988 | EP0259533A1 Method of reducing the emission of nitrogen oxides from a liquid containing nitric acid |
| 03/16/1988 | EP0259366A1 Polysilazanes and related compositions, processes and uses. |
| 03/15/1988 | US4731437 From a borazine and anamine |
| 03/15/1988 | US4731236 Process for producing sialon |
| 03/15/1988 | US4731235 Method of making silicon nitride |
| 03/15/1988 | US4731231 Nitric oxide |
| 03/15/1988 | CA1234244A1 Hydrosilazane polymers from [r.sub.3si].sub.2nh and hsicl.sub.3 |
| 03/09/1988 | EP0259041A2 Nitrogen production |
| 03/08/1988 | US4730026 Heating to give ceramic |
| 03/02/1988 | EP0257493A1 Adsorptive separation of gas mixtures |
| 02/25/1988 | WO1988001253A1 Process for producing nitrogen dioxide rich gas or pure oxygen |
| 02/24/1988 | EP0256840A2 Process for separation of acids and corresponding acid metal salts |
| 02/24/1988 | EP0256533A2 Method and apparatus for reduction of the nitrogen oxide content in effluent gases from absorption column for manufacture of nitric acid |
| 02/24/1988 | EP0256218A2 Sinterable silicon nitride powder and method of manufacturing the same |
| 02/24/1988 | CN87202629U Multi-way combined change valve for molecular sieve nitrogen-making machine |
| 02/23/1988 | US4727190 Oxidation of benzophenone-imines |
| 02/18/1988 | DE3627429A1 Verfahren zur herstellung von stickstoffdioxid-reichgas Process for the preparation of nitrogen dioxide-rich gas |
| 02/16/1988 | US4725421 Continuous hydrolysis of slightly soluble ketazine with simultaneous distillation of ketone and removal of product |
| 02/16/1988 | US4725360 Ion exchanging; aqueous sulfuric acid elution |
| 02/16/1988 | US4725335 Initiating auto catalytic reaction generating nitrogen oxide |
| 02/11/1988 | DE3626359A1 Evaporator and method for evaporating a fluid |
| 02/09/1988 | US4724133 Hydrolyzing acetone azine, distilling under pressure |
| 02/09/1988 | US4724131 Method for producing α-form silicon nitride |
| 02/09/1988 | US4723918 Connection device |
| 02/09/1988 | CA1232430A1 Air separation with temperature and pressure swing |
| 02/02/1988 | US4722988 Organopolysilazane composition containing free radical generators and capable of being crosslinked by an energy input |
| 02/02/1988 | US4722918 Acid-activated three-layer silicate combined with metal oxide |
| 01/26/1988 | CA1231931A1 Crystalline zeolite and the agglomerate thereof |
| 01/19/1988 | US4720476 Catalyst for decreasing the content of nitrogen oxides in flue gases |
| 01/19/1988 | US4720377 Method for producing nitrous oxide by reacting ammonia with a molten nitrate salt of an alkaline earth metal |
| 01/19/1988 | CA1231515A1 Preceramic organosilazane polymers |
| 01/19/1988 | CA1231514A1 Method of making yttrium silicon oxynitrides |
| 01/19/1988 | CA1231513A1 Process for the preparation of phosphonitrile chloride oligomer |
| 01/13/1988 | EP0252483A2 Agent for the reoxidation of vat, sulphur vat or sulphur dyeings, process for its preparation and its use |
| 01/12/1988 | US4719192 Pollution control, synergistic |
| 01/12/1988 | US4719095 Production of silicon ceramic powders |
| 01/12/1988 | US4719092 Reduction of nitrogen-based pollutants through the use of urea solutions containing oxygenated hydrocarbon solvents |
| 01/07/1988 | EP0251322A2 Method for refining non-oxide ceramic powders |
| 01/07/1988 | EP0250688A1 Polymerization of cyclic dihalophosphazene oligomers |
| 12/30/1987 | CN86104009A Process of titanium nitride powder |
| 12/29/1987 | US4716247 From hydrazine, hydrogen cyanide and sulfur |
| 12/29/1987 | US4716028 Process for preparation of high-type silicon nitride powder |
| 12/23/1987 | EP0250073A2 Method for producing nitride-base ceramics |
| 12/22/1987 | US4714599 Process for preparing rhombohedral system boron nitride using NaBH4 -and NH4 Cl |
| 12/16/1987 | EP0248922A1 Process for producing oxygen-enriched gas |
| 12/15/1987 | US4713224 One-step process for purifying an inert gas |
| 12/08/1987 | CA1229968A1 Method for purifying cyclic dichlorophosphazene trimer of catalytic impurities |
| 12/03/1987 | WO1987007249A1 Process for producing carbon molecular sieves |
| 12/02/1987 | EP0247907A2 Metal carbide and nitride powders for ceramics obtained by carbothermal reduction, and process for their manufacture |
| 12/01/1987 | US4710368 Cutters, reinforcement, fibers, felts, refractories |
| 11/26/1987 | DE3617036A1 Pressure-swing adsorption process |
| 11/25/1987 | CN87102164A Method and apparatus for air compression |
| 11/24/1987 | USRE32549 Foldable metallic gauze pack and segment |
| 11/24/1987 | US4709071 Heating with tellurium, tellurium or molybdenum compound |
| 11/24/1987 | US4709070 Process for improving activity of tellurium containing metal oxide catalysts |
| 11/24/1987 | US4708858 Polymerization of cyclic dihalophosphazene oligomers |