| Patents for C01B 21 - Nitrogen; Compounds thereof (10,781) |
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| 12/14/1988 | EP0294588A2 Process for the purification of gases |
| 12/14/1988 | EP0294382A1 A gas concentrating method and plant |
| 12/13/1988 | US4790986 Method and apparatus to produce a hot fluidizing gas |
| 12/13/1988 | US4790859 Method of separating gaseous mixture |
| 12/07/1988 | EP0294142A2 Method of cleaning exhaust gases |
| 12/07/1988 | EP0294100A1 A process for producing a purified hydrazine hydrate |
| 12/06/1988 | US4789539 Reacting alkali or alkaline earth metal amide with chlorine |
| 12/06/1988 | US4789534 Pyroysis of metal amide |
| 12/01/1988 | DE3717285A1 Verfahren zur herstellung von pulverfoermigem siliciumnitrid A process for preparing silicon nitride powder |
| 11/30/1988 | EP0292823A2 Process for NO recovery from off-gas generated in the production of ammon nitrite |
| 11/29/1988 | US4788309 Polysilazanes, pyrolysis to silicon nitride |
| 11/29/1988 | US4788167 Aluminum nitride/aluminum oxynitride/group IVB metal nitride abrasive particles derived from a sol-gel process |
| 11/29/1988 | US4788049 Heating ammonia and a chlorosilane to intermediate silicon chloroimide; comminution, controlled firing to nitride |
| 11/29/1988 | CA1245675A1 Ceramic materials from silazane polymers |
| 11/17/1988 | WO1988008824A1 Process for nitrogen oxides reduction and minimization of the production of other pollutants |
| 11/15/1988 | US4784978 Nitriding boron compounds with organonitrogen compounds |
| 11/15/1988 | US4784839 Method of making metal carbide and nitride powders |
| 11/10/1988 | DE3715783C1 Heat exchanger for combination with a burner hood of a contact reactor |
| 11/09/1988 | EP0290076A2 Process for the preparation of sialon products |
| 11/09/1988 | EP0289918A1 Process for preparing compact, crystalline and pore-free moulded articles from oxide ceramics |
| 11/08/1988 | US4783430 Process of making high purity aluminum nitride |
| 11/08/1988 | US4783325 Process and apparatus for removing oxides of nitrogen and sulfur from combustion gases |
| 11/08/1988 | US4783203 Integrated pressure swing adsorption/membrane separation process |
| 11/08/1988 | CA1244230A1 Non-catalytic method for reducing the concentration of no in combustion effluents |
| 11/02/1988 | EP0289440A1 A method for the production of beta'-sialon based ceramic powders |
| 11/02/1988 | EP0288645A1 Hexagonal boron nitride having a reduced content of water soluble boron-containing impurities, and process for its production |
| 11/01/1988 | US4781907 Production of membrane-derived nitrogen from combustion gases |
| 11/01/1988 | US4781900 Process and composition for purifying arsine, phosphine, ammonia, and inert gases to remove Lewis acid and oxidant impurities therefrom |
| 11/01/1988 | CA1243819A1 Cyclic phosphonitrilic halide process |
| 10/27/1988 | EP0242394A4 Reduction of nitrogen-based pollutants through the use of urea solutions containing oxygenated hydrocarbon solvents. |
| 10/27/1988 | EP0238654A4 Reduction of nitrogen- and carbon-based pollutants through the use of urea solutions. |
| 10/26/1988 | EP0288030A1 Improved outerwrap for hollow fiber membrane separation device |
| 10/26/1988 | EP0287952A2 Process for the preparation of salts of hydroxylammonium |
| 10/26/1988 | EP0287644A1 Method and apparatus to produce a hot fluidizing gas |
| 10/26/1988 | CN88101838A Multi-stage process for reducing concentration of pollutants in effluent |
| 10/25/1988 | US4780299 Aqueous boehmite and carbon source; sintering, decarbonization |
| 10/25/1988 | US4780292 Reacting phosphorus pentachloride with ammonium chloride, treating product with sulfur dioxide |
| 10/25/1988 | US4780289 Monitoring effluents-adjustment of supply and dilution rate of treating agent |
| 10/18/1988 | US4778669 Reacting hydroxylammonium sulfate with ammonia in lower alkanol solvent |
| 10/12/1988 | EP0286465A1 Process for the preparation of polychlorophosphazene in the presence of bis(dichlorophosphoryl) imide |
| 10/11/1988 | US4777024 Multi-stage process for reducing the concentration of pollutants in an effluent |
| 10/05/1988 | CN88101267A Method for preparating polychlorophosphnitrile |
| 10/05/1988 | CN88101252A Method for preparating basically pure and colourless n-(dichlor-phosphoryl) trichlorophosphnitrile |
| 10/05/1988 | CN88101229A Method for preparating polychlorophosphnierile under bis (dichlor-phosphoryl) imide |
| 10/04/1988 | US4775396 Selective adsorption of CO2 on zeolites |
| 09/28/1988 | EP0284478A1 Process for the preparation of trichlorophosphazene phosphoryl dichloride |
| 09/28/1988 | EP0284477A1 Process for the preparation of substantially pure and colorless trichlorophosphazene phosphoryl dichloride |
| 09/28/1988 | EP0284448A1 High purity nitrogen producing method |
| 09/28/1988 | EP0284235A1 Production of ceramic material and of precursor therefor |
| 09/28/1988 | EP0284222A1 Reactor |
| 09/28/1988 | EP0283961A2 Process and composition for purifying arsine, phosphine, ammonia and inert gases to remove Lewis acid and oxidant impurities therefrom |
| 09/27/1988 | US4774069 Palladium-ceramic catchment trap |
| 09/27/1988 | CA1242461A1 Ceramic materials with increased crystallinity from silazane polymers |
| 09/22/1988 | WO1988007024A1 Process for the reduction of nitrogen oxides in an effluent using sugar |
| 09/21/1988 | EP0283375A1 Process for the preparation of polychlorophosphazene |
| 09/21/1988 | EP0283112A2 Process for preparing aluminium nitride powder, and aluminium nitride bodies obtained therefrom |
| 09/21/1988 | CN87216165U Thallium type twin-waste gas exchange shutter |
| 09/20/1988 | US4772516 Stable methylpolydisilylazane polymers |
| 09/20/1988 | US4772494 Method of spinning fibers and coating from an organopolysilazane composition containing free radical generators and capable of being crosslinked by an energy input |
| 09/20/1988 | US4772304 Transparent BN-type ceramic material and method of producing the same |
| 09/14/1988 | EP0282291A2 Process for producing ultrafine particles of metals, metal compounds and ceramics and apparatus used therefor |
| 09/14/1988 | EP0282053A2 Molecular sieving carbon, process for its production and its use |
| 09/13/1988 | US4770830 Process for preparation of high α-type silicon nitride powder |
| 09/13/1988 | CA1241972A1 Ceramic materials from silazane polymers |
| 09/07/1988 | WO1988006569A1 Multi-stage process for reducing the concentration of pollutants in an effluent |
| 09/07/1988 | WO1988006487A1 Process for nitrogen oxides reduction with minimization of the production of other pollutants |
| 09/06/1988 | US4769064 Method for synthesizing ultrafine powder materials |
| 08/30/1988 | US4767607 Method for production of high purity aluminum nitrides |
| 08/30/1988 | US4767606 Process and apparatus for producing nitrogen |
| 08/23/1988 | US4765808 Separation of carbon monoxide from nitrogen with Ba exchanged zeolite X |
| 08/23/1988 | CA1240812A1 Process for producing nitrogen oxides from aqueous waste cellulose pulp liquor containing nitrogen compounds |
| 08/17/1988 | EP0278734A2 Boron nitride preceramic polymers |
| 08/17/1988 | CN87107838A Method and apparatus to produce hot fluidizing gas |
| 08/16/1988 | US4764489 Heating organoaluminum compound and boron nitrogen compound |
| 08/10/1988 | EP0277766A2 Process for producing devices containing silicon nitride films |
| 08/10/1988 | EP0197973B1 Method for nitriding refractory oxides |
| 08/09/1988 | US4762682 Catalyst support, grain size |
| 08/03/1988 | EP0276542A2 Distillation method and apparatus |
| 08/03/1988 | EP0276334A1 Silicon nitride-silicon carbide composite material and process for production thereof |
| 08/02/1988 | US4761395 Process and composition for purifying arsine, phosphine, ammonia, and inert gases to remove Lewis acid and oxidant impurities therefrom |
| 07/27/1988 | EP0275681A1 Ammonia oxidation catalyst pack |
| 07/26/1988 | US4759179 Method for generating electronically excited NF for use in a laser |
| 07/26/1988 | CA1239595A1 Enhanced pressure swing adsorption processing |
| 07/26/1988 | CA1239594A1 Single bed pressure swing adsorption gas separation system |
| 07/26/1988 | CA1239593A1 Pressure swing adsorption process for supplying oxygen under variable demand conditions |
| 07/20/1988 | CN87214037U Nitrogen-base gas generator using variant gas sources |
| 07/19/1988 | US4758539 Process for producing ceramic nitrides and carbonitrides and their precursors |
| 07/19/1988 | US4758341 Membrane separation device |
| 07/14/1988 | WO1988005027A1 Method for producing ceramic powders |
| 07/12/1988 | US4756890 Reduction of NOx in flue gas |
| 07/12/1988 | CA1239005A1 Continuous inorganic fiber consisting of si, n and o and method of producing the same |
| 07/06/1988 | EP0273884A2 Device and composition for liberating nitrogen gas during the manufacture of a cathode ray tube |
| 07/06/1988 | CN87108317A Material for treatment of ammonia |
| 06/29/1988 | EP0272493A2 Method for producing aluminium nitride powder |
| 06/29/1988 | EP0272377A2 Process and apparatus for the thermic and/or reducing treatment of solids, granular and/or agglomerated charges |
| 06/28/1988 | CA1238558A1 Method of forming a nitride layer |
| 06/22/1988 | CN87107375A Process for producing n-(dichloro-phosphoryl) trichlorophosphazene from phosphorus pentachloride and ammonium chloride |
| 06/16/1988 | DE3641754A1 Process for preparing aluminium nitride powder |
| 06/15/1988 | EP0271353A2 Aluminum nitride products and processes for the production thereof |
| 06/15/1988 | EP0271237A1 Aluminum nitride/aluminum oxynitride/group IV B metal nitride abrasive particles derived from a sol-gel process |