| Patent Number |
Title Of Patent |
Date Issued |
| 7552599 |
Air separation process utilizing refrigeration extracted from LNG for production of liquid oxyge |
June 30, 2009 |
| A cryogenic air separation process is set forth wherein, in order to provide the refrigeration necessary when at least a portion of the oxygen product is desired as liquid oxygen, LNG-derived refrigeration is used to liquefy a nitrogen stream in the process. A key to the present inventio |
| 7501009 |
Combined cryogenic distillation and PSA for argon production |
March 10, 2009 |
| A method and apparatus for producing high purity argon by combined cryogenic distillation and adsorption technologies is disclosed. Crude argon from a distillation column or a so-called argon column is passed to a system of adsorption vessels for further purification. Depressurization |
| 6484516 |
Method and system for cryogenic refrigeration |
November 26, 2002 |
| A cryocooler system comprising a heat exchanger for cooling a compressed returning warmed cryogenic fluid stream, the heat exchanger having a bypass loop to produce a major stream and a minor stream exiting the heat exchanger. The minor stream is further cooled by expansion and used as a |
| 6298688 |
Process for nitrogen liquefaction |
October 9, 2001 |
| A process for gas liquefaction, particularly nitrogen liquefaction, which combines the use of a nitrogen autorefrigeration cooling cycle with one or more closed-loop refrigeration cycles using two or more refrigerant components. The closed-loop refrigeration cycle or cycles provide r |
| 6263701 |
Process for the purification of a major component containing light and heavy impurities |
July 24, 2001 |
| A process purifies and recovers a major component from a feed stream containing: the major component at a concentration of at least 90 mole %, at least one light component having a greater volatility than the volatility of the major component, and at least one heavy component having |
| 6253576 |
Process for the production of intermediate pressure oxygen |
July 3, 2001 |
| A process is provided for the production of intermediate pressure oxygen. Intermediate pressure is defined as a pressure range between about 15 psia and about 27 psia, and preferably between about 17 psia and about 23 psia. The process uses a double column cryogenic air separation system |
| 6240744 |
Process for distillation of multicomponent fluid and production of an argon-enriched stream from |
June 5, 2001 |
| A process separates a multicomponent feed by distillation into at least one stream enriched in the most volatile component, one stream enriched in the least volatile component, and one stream enriched in a component of intermediate volatility. In one embodiment, the process produces an |
| 6233970 |
Process for delivery of oxygen at a variable rate |
May 22, 2001 |
| A process delivers oxygen at a variable flow rate from a distillation system. The process uses a higher pressure column and a lower pressure column. The effects of oxygen product rate fluctuations on the distillation system are reduced by maintaining essentially constant flow rates w |
| 6227005 |
Process for the production of oxygen and nitrogen |
May 8, 2001 |
| A process for the production of oxygen and nitrogen is applicable when the oxygen product is withdrawn from a distillation column system as a liquid, pumped to an elevated pressure and warmed at least in part by cooling a suitably pressurized stream. At least a portion of the compressed, |
| 6009723 |
Elevated pressure air separation process with use of waste expansion for compression of a proces |
January 4, 2000 |
| 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 and fed to a distillation colum |
| 5970743 |
Production of argon from a cryogenic air separation process |
October 26, 1999 |
| The present invention relates to a process for the cryogenic separation of air to recover at least a nitrogen-depleted crude argon product, wherein the process is carried out in a primary distillation system comprising at least a first distillation column, which separates a feed mixture |
| 5966967 |
Efficient process to produce oxygen |
October 19, 1999 |
| 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 provided by condensing a stream |
| 5956974 |
Multiple expander process to produce oxygen |
September 28, 1999 |
| 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 provided by condensing a stream |
| 5956973 |
Air separation with intermediate pressure vaporization and expansion |
September 28, 1999 |
| A double column cryogenic air separation system is operated to increase boilup in the lower pressure column by vaporizing at an intermediate pressure a liquid stream containing at least 20 mole % oxygen, work expanding the stream, and introducing the resulting expanded stream into th |
| 5934104 |
Multiple column nitrogen generators with oxygen coproduction |
August 10, 1999 |
| The present invention is an improvement to a nitrogen generator enabling the process to efficiently coproduce oxygen with low recovery, typically less than 70% and preferably less than 55%, in addition to the primary product, nitrogen. In the nitrogen generator process, air is distilled |
| 5907959 |
Air separation process using warm and cold expanders |
June 1, 1999 |
| The present invention relates to a process for the cryogenic distillation of air in a distillation column system having at least one distillation column operating at a higher pressure and one distillation column operating at a lower pressure, wherein feed air is cooled and fed to the |
| 5901576 |
Single expander and a cold compressor process to produce oxygen |
May 11, 1999 |
| In 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 provided by condensing a stream whose nitrogen concentration is e |
| 5865041 |
Distillation process using a mixing column to produce at least two oxygen-rich gaseous streams h |
February 2, 1999 |
| A process is set forth for the cryogenic distillation of an air feed to produce at least two oxygen-rich gaseous streams having different oxygen purities. The process uses a mixing column system in addition to a distillation column system. A key to the process is that at least two ox |
| 5701764 |
Process to produce moderate purity oxygen using a double column plus an auxiliary low pressure c |
December 30, 1997 |
| A process is set forth for the cryogenic distillation of an air feed to produce an oxygen product, particularly an oxygen product at moderate purity (80-99%, preferably 85-95%). The process uses an auxiliary low pressure column in addition to the conventional high pressure column and |
