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| Number | Title | Issue Date |
| 7370494 | Method and installation for producing, in gaseous form and under high pressure, at least one fluid chosen from oxygen, argon and nitrogen by cryogenic distillation of air A process and apparatus for highly efficient production of industrial gases by the cryogenic distillation of air, wherein a feed stream of compressed air, is supercharged to high pressure, cooled, and mixed with various recycle streams of supercharged air, to regula... | 05/13/2008 |
| 7322198 | System for vaporization of liquid fuels for combustion and method of use A gas stream with a reduced oxygen concentration relative to ambient air is used to vaporize a liquid fuel or liquefied higher hydrocarbon gas, or is mixed with a vaporized gas, and the reduced oxygen vaporized fuel gas is fed to a combustion device such as a premix... | 01/29/2008 |
| 7272954 | Low temperature air separation process for producing pressurized gaseous product An apparatus and process for producing pressurized gaseous product by air separation. A compressed air stream is cooled in an exchanger to form a compressed cooled air stream. The stream is then cryogenically compressed in a first compressor to form a first pressuri... | 09/25/2007 |
| 7225637 | Integrated air compression, cooling, and purification unit and process Process and apparatus for optimization of integrated air separation systems. In an integrated process for the compression, cooling, and purification of air, an adiabatic compressor compresses an air stream to produce a compressed air stream. The compressed air strea... | 06/05/2007 |
| 7197894 | Integrated process and air separation process An integrated process and air separation process including the steps of: Work expanding at least one first pressurized gas 39 derived from a first process at a first site 1, using work generated by the expansion of the at least one pressurized gas to d... | 04/03/2007 |
| 7185675 | Reduced gain thrust control valve A reduced gain thrust control valve for use in a rocket engine has a housing with a fluid inlet and a piston and cylinder unit for controlling a fluid output of the control valve. The fluid inlet is formed by at least one metering element formed in the housing. The ... | 03/06/2007 |
| 7125439 | Air environment control system and technique Method and apparatus for providing clean air to an environment. Incoming air, which may be contaminated with chemical, nuclear or biological contamination is initially cooled and water is removed from the cooled air by a first cooler, a first water separator, a seco... | 10/24/2006 |
| 6718794 | Method and apparatus for generating energy The invention concerns a method for generating energy, which consists in conveying to an air separation apparatus (5) air from a compressor (1) coupled to an expansion machine (3). A nitrogen-enriched gaseous flow (11) containing between ... | 04/13/2004 |
| 6499313 | Process and apparatus for generating high-purity nitrogen by low-temperature fractionation of air High-purity nitrogen is generated by low-temperature fractionation of air in a rectification system for nitrogen/oxygen separation having at least a first rectifier column (4). Cycle nitrogen (24) in gas form is removed from the upper region of the first ... | 12/31/2002 |
| 6490884 | Process and device for production of oxygen and nitrogen Oxygen and nitrogen are produced by low-temperature separation of air in a rectification system that has a pressure column (4) and a low-pressure column (5). Charging air (1, 3) is introduced into pressure column (4). An oxygen-containing liquid fraction ... | 12/10/2002 |
| 6257019 | Production of nitrogen Nitrogen is produced by separation of it from air. Nitrogen so separated is condensed. Most or all of the nitrogen is separated by rectification. At least some of the condensed nitrogen is employed as reflux in the rectification. The nitrogen is both sepa... | 07/10/2001 |
| 6244072 | Air separation Air is separated in a double rectification column comprising a higher pressure column and a lower pressure column, the latter operating at pressures of less than 2 bar absolute. An oxygen product is withdrawn from the column by a pump. A first vaporous ni... | 06/12/2001 |
| 6196023 | Method and device for producing compressed nitrogen The process and the apparatus serve to produce pressurized nitrogen by low-temperature fractionation of air in a rectification system which has a pressure column (4) and a low-pressure column (5). Feed air (1, 3) is passed into the pressure column (4). An... | 03/06/2001 |
| 6079223 | Cryogenic air separation system for producing moderate purity oxygen and moderate purity nitrogen A cryogenic air separation system wherein feed air is initially processed to produce a vapor and a liquid, the vapor is then processed in the rectifying section of a reflux condenser to produce moderate purity nitrogen, and the liquid is processed in the ... | 06/27/2000 |
| 6009723 | Elevated pressure air separation process with use of waste expansion for compression of a process stream The present invention relates to an elevated pressure air separation cryogenic process wherein feed air is compressed, treated to remove water and carbon dioxide, cooled to cryogenic temperature in a main heat exchanger having a cold end and a warm end an... | 01/04/2000 |
| 5979183 | High availability gas turbine drive for an air separation unit Oxygen is produced by compressing air to provide a first and a second pressurized air stream, separating the first pressurized air stream into an oxygen-rich product stream and a nitrogen-rich byproduct stream, and combining the nitrogen-rich byproduct st... | 11/09/1999 |
| 5966967 | Efficient process to produce oxygen The present invention relates to a process for the cryogenic distillation of air in a distillation column system that contains at least one distillation column wherein the boil-up at the bottom of the distillation column producing the oxygen product is pr... | 10/19/1999 |
| 5964104 | Method and device for obtaining nitrogen by low-temperature separation of air In the method and device, nitrogen is obtained by two-stage rectification of air in a double column. Double column contains a high-pressure column and a medium-pressure column that are in a heat-exchange relationship with each other. Entering air is compr... | 10/12/1999 |
| 5839296 | High pressure, improved efficiency cryogenic rectification system for low purity oxygen production An improved efficiency system for producing low purity oxygen by rectification of air employs a high pressure column and a low pressure column and includes the steps of: turboexpanding a flow of nitrogen-rich gas from the high pressure column to provide a... | 11/24/1998 |
| 5802874 | Process and apparatus for liquefying low boiling gas such as nitrogen A process and apparatus are used for liquefying a low-boiling gas, 1, 507, particularly nitrogen. Gas to be liquified is cooled 12 under an increased pressure, is expanded 14 and is then obtained as a liquid product 16. In a refrigeration cycle, cycle med... | 09/08/1998 |
| 5711166 | Air separation method and apparatus A method and apparatus of separating air in which the air is rectified wig a single column nitrogen generator which produces a nitrogen stream which is expanded into a refrigerant stream and then taken as a medium pressure product. Oxygen enriched air can... | 01/27/1998 |
| 5678427 | Cryogenic rectification system for producing low purity oxygen and high purity nitrogen A double column cryogenic rectification system for producing low purity oxygen and high purity nitrogen, preferably at elevated pressure, wherein nitrogen-rich vapor from the higher pressure column is turboexpanded and condensed against lower pressure col... | 10/21/1997 |
| 5664438 | Cryogenic side column rectification system for producing low purity oxygen and high purity nitrogen A cryogenic rectification system for producing low purity oxygen and high purity nitrogen, preferably at elevated pressure, wherein nitrogen-rich vapor from a higher pressure column is turboexpanded and condensed against lower pressure column intermediate... | 09/09/1997 |
| 5651271 | Process for the separation of a gas mixture by cryogenic distillation In order to precool a flow of gas to be distilled, before a purification stage, it is sent into an exchanger (5) where it is cooled by heating a flow of refrigerant (13B). At least a part of this refrigerant has its pressure reduced before cooling the unp... | 07/29/1997 |
| 5459994 | Gas turbine-air separation plant combination A system and method of operating a system comprising an air separation plant and a gas turbine engine, the method comprising: providing a nitrogen-rich stream from the air separation plant; expanding and thereby cooling the nitrogen-rich stream; and deliv... | 10/24/1995 |
| 5359857 | Installation for air liquefaction separation and process therefor An air liquefaction separation installation is provided with a rectification column which have a carbon monoxide rectification part connected to the upper part of the rectification column and at upper part of its rectification parts or a main condensation... | 11/01/1994 |
| 5341647 | Porcess and apparatus for the production of high pressure nitrogen and oxygen According to the process of the invention, after heating, nitrogen which exits from a pressure column is compressed under elevated pressure by means of a single nitrogen compressor, and the low pressure column is operated at a pressure of about PN | 08/30/1994 |
| 5321953 | Cryogenic rectification system with prepurifier feed chiller A cryogenic rectification system wherein excess pressurized fluid produced in a cryogenic rectification plant is turboexpanded and used to chill feed prior to passing the feed through a prepurifier for removal of at least some of the high boiling componen... | 06/21/1994 |
| 5317862 | Air separation In a process integration, particularly with a blast furnace, nitrogen under pressure is moisturized by the addition to it of hot, pressurized water. The moisturized nitrogen is expanded and power thereby generated. The nitrogen is not mixed with combustio... | 06/07/1994 |
| 5228297 | Cryogenic rectification system with dual heat pump A cryogenic air separation system wherein high pressure oxygen is transition-warmed against both transition-cooling feed air and transition-cooling nitrogen, supplying added reflux for the air separation and enabling column operation at higher pressures w... | 07/20/1993 |
| 5163296 | Cryogenic rectification system with improved oxygen recovery A cryogenic rectification system wherein nitrogen top vapor of a higher pressure column reboils the column to provide additional vapor upflow and liquid downflow reflux for increased column drive and improved oxygen recovery.... | 11/17/1992 |
| 5152149 | Air separation method for supplying gaseous oxygen in accordance with a variable demand pattern An air separation method for supplying gaseous oxygen to meet the requirements of a variable demand cycle. In accordance with present invention, air is rectified by a double column low temperature rectification process to produce a nitrogen rich vapor and... | 10/06/1992 |
| 5080703 | Air separation Compressed air is purified in apparatus 4 and passed through heat exchanger 6 in which it is reduced in temperature ready for rectification in a double column comprising a higher pressure rectification column 10 and a lower pressure rectification column 1... | 01/14/1992 |
| 5077978 | Cryogenic process for the separation of air to produce moderate pressure nitrogen This invention relates to a cryogenic process for the separation of air utilizing an integrated multi-column distillation system wherein a nitrogen rich, oxygen rich and argon rich product are generated. In the cryogenic distillation separation of air, ai... | 01/07/1992 |
| 5006139 | Cryogenic air separation process for the production of nitrogen The present invention is a cryogenic process for the production of nitrogen by distilling air in a double column distillation system comprising a high pressure column and a low pressure column. The critical step of the invention is the condensation of two... | 04/09/1991 |
| 4894076 | Recycle liquefier process The present invention is a liquefaction process for atmospheric gases. In the process, one or more atmospheric gas streams (e.g., air, nitrogen, etc.) are compressed in a compression zone to provide both an intermediate stream and a high pressure stream. ... | 01/16/1990 |
| 4871382 | Air separation process using packed columns for oxygen and argon recovery The present invention relates to an improvement to a cryogenic air separation process having an argon sidearm column. The improvement to the process for maximizing argon recovery comprises effectuating the intimate contact of the liquid phase stream and t... | 10/03/1989 |
| 4842625 | Control method to maximize argon recovery from cryogenic air separation units The present invention relates to an improvement to a conventional cryogenic air separation process having an argon sidearm column. The improvement to the process comprises reducing the pressure of the feed gas to the argon sidearm column across a control ... | 06/27/1989 |
| 4836836 | Separating argon/oxygen mixtures using a structured packing The present invention relates to improvements to a process and apparatus for the cryogenic distillation of mixtures, which comprise oxygen, nitrogen and argon, e.g. air. The improvement comprises effectuating intimate contact of the liquid and vapor phase... | 06/06/1989 |
| 4834785 | Cryogenic nitrogen generator with nitrogen expander The present invention is an improvement to a conventional, single column, cryogenic, nitrogen generator which is able to produce nitrogen at near atmospheric pressure. In the improvement, the product nitrogen from the rectifier column is expanded through ... | 05/30/1989 |
