Class 252/375 - Nitrogen from air or elementary nitrogen only and hydrogen from compounds

Subclass of Class 252 - Compositions
Definition: Compositions in which the direct source of the nitrogen
No. of patents: 23
Last issue date: 10/07/2008

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Number	Title	Issue Date
7431865	Production of ammonia synthesis gas Ammonia synthesis gas production having a shift reaction stage employing a copper-based catalyst wherein the air supplied to the process is passed through an absorber that removes sulfur and/or halide contaminants, is described. The absorber has a support carrying a...	10/07/2008
7338962	Spirocyclic heterocyclic derivatives and methods of their use Spirocyclic heterocyclic derivatives, pharmaceutical compositions containing these compounds, and methods for their pharmaceutical use are disclosed. In certain embodiments, the spirocyclic heterocyclic derivatives are ligands of the δ opioid receptor and may be us...	03/04/2008
7140187	Urea based composition and system for same A method and apparatus for generating energy from a composition comprising urea and water are described. The method in one embodiment includes: (a) reacting the urea with water to form ammonia; and (b) oxidizing the ammonia formed in step (a) to form water and nitro...	11/28/2006
6361715	Method for reducing the redox potential of substances Apparatus and a method of providing a water-based fluid with active hydrogen having selected characterstics including providing at least one material (10) having selected characteristics and supply of hydrogen atoms from at least one material (10) to flui...	03/26/2002
6190632	Method and apparatus for the production of ammonia utilizing cryogenic rectification A system for producing ammonia by integrating blast furnace ironmaking with ammonia production wherein cryogenic rectification links the two systems enabling the production of ammonia synthesis gas from blast furnace gas for use in the ammonia production....	02/20/2001
6159395	Process and plant for reforming hydrocarbonaceous feedstock The present invention provides a process for the production of a synthesis gas mixture containing carbon oxides and hydrogen from a hydrocarbon feedstock material comprising: providing a reforming zone having a plurality of chambers charged with a catalys...	12/12/2000
6051162	Process for the generation of a low dew-point, oxygen-free protective atmosphere for the performance of thermal treatments A process for the generation of a protective nitrogen-based atmosphere for the performance of heat treatments of metal articles in three phases, including an initial phase in which a gaseous hydrocarbon feed and an oxidant containing oxygen react on a fir...	04/18/2000
5615742	Noncombustible hydrogen gas containing atmospheres and their production A method for extinguishing hydrogen fires comprises introducing to the hydrogen fire a fire extinguishing concentration of 1,1,1,2,3,3,3-heptafluoropropane and maintaining the concentration until the fire is extinguished. The method includes heptafluoropr...	04/01/1997
5290480	Process for producing furnace atmospheres by deoxygenating non-cryogenically generated nitrogen with dissociated ammonia A process for producing low-cost furnace atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals and ceramics, sealing glass to metals, and sintering non-ferrous metal and ceramic powders from non-cry...	03/01/1994
4725381	Hydrogen streams A carbonaceous feedstock, e.g. coal or heavy oil, having a low hydrogen to carbon atomic ratio is partially oxidized using air, or oxygen enriched or depleted air, to form a crude gas which is subjected to catalytic shift and excess steam removal. Carbon ...	02/16/1988
4613492	Production of synthesis gas A process for the production of ammonia wherein excess nitrogen is fed to the secondary reformer and a cryogenic unit is employed to obtain a nitrogen-rich stream which is recycled at least in part to the cryogenic unit....	09/23/1986
4553981	Enhanced hydrogen recovery from effluent gas streams Effluent gas streams for steam reforming, partial oxidation or coal gasification operations are advantageously treated in shift conversion, scrubbing and pressure swing adsorption units for recovery of a purified, hydrogen-containing product gas stream. B...	11/19/1985
4414191	Process for the production of ammonia In a pressure swing adsorption system for the purification of hydrogen to be used in an ammonia synthesis gas, nitrogen is employed as a purge gas at an elevated purge pressure. The hydrogen recovered at adsorption pressure contains about 20-25% nitrogen ...	11/08/1983
4409196	Synthesis gas for ammonia production A process for producing a gas stream for ammonia synthesis in which a gas stream containing hydrogen and nitrogen in excess of ammonia synthesis requirements, e.g. obtained by partial oxidation of natural gas, coal or oil, is treated to remove other compo...	10/11/1983
4375363	Selective adsorption process for production of ammonia synthesis gas mixtures A process for forming a gas mixture containing hydrogen and nitrogen for ammonia synthesis, wherein a feed gas mixture containing hydrogen and adsorbable impurities is separated by selective adsorption of the impurities in each of multiple adsorbent beds ...	03/01/1983
4338107	Wash system gas separation An improvement in a wash system for gas separation wherein a wash liquid is contacted countercurrently with a feed gas mixture containing a high volatility component and a low volatility component in a plate and fin type exchanger where the heat of absorp...	07/06/1982
4249965	Method of generating carrier gas The present invention is a method of generating Class 302 type carrier gas for use in carburizing processes. The gas has a composition of approximately 40% nitrogen, 40% hydrogen and 20% carbon monoxide. The nitrogen is mixed with the methanol in a vapori...	02/10/1981
4197281	Production of ammonia synthesis gas from solid carbonaceous fuels This is a continuous process for producing ammonia synthesis gas and includes the partial oxidation of particles of solid carboniferous fuels entrained in nitrogen. In the process, air is separated into high pressure nitrogen and substantially pure oxygen...	04/08/1980
4069071	Method for generating a reducing atmosphere for heat-treating installations An atmosphere of nitrogen containing hydrogen is generated by cracking amia and recycling a previously generated atmosphere that already had been used. The atmosphere generated by cracking, and the recovered atmosphere that previously had been used, are ...	01/17/1978
4057510	Production of nitrogen rich gas mixtures A nitrogen-rich inert gas mixture is produced by the partial oxidation of a hydrocarbonaceous feed containing substantially no metals nor noncombustible materials with air in a free-flow, unpacked, refractory-lined gas generator at a temperature in the ra...	11/08/1977
4007129	Partial combustion process for manufacturing a purified gas containing hydrogen and carbon monoxide An improved process for manufacture of a purified gas containing hydrogen and carbon monoxide is described wherein a fuel is partially combusted in a reactor to produce a crude gas product containing soot, ash and contaminating gases such as HCN, H2	02/08/1977
3957458	Gasifying coal or coke and discharging slag frit Granulated coals or cokes derived from coal, in sizes up to about 3/4 inch and containing ash matter with an initial deformation temperature below about 2,300°F, are fed to a slow fluidized bed comprising relatively large particles of coke intermingled w...	05/18/1976
3957457	Gasifying coal or coke and discharging ash agglomerates Granulated coals or cokes derived from coal, in sizes up to about 3/4 inch and containing ash matter with an initial deformation temperature above about 2,300°F, are fed to a slow fluidized bed comprising relatively large particles of coke intermingled w...	05/18/1976

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Class 252/375 - Nitrogen from air or elementary nitrogen only and hydrogen from compounds