Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7437891 | Recovery and purification of ethylene A process for the recovery and purification of ethylene and optionally propylene from a stream containing lighter and heavier components that employs an ethylene distributor column and a partially thermally coupled distributed distillation system. ... | 10/21/2008 |
| 7310971 | LNG system employing optimized heat exchangers to provide liquid reflux stream An improved apparatus and method for providing reflux to a refluxed heavies removal column of a LNG facility. The apparatus comprises stacked vertical core-in-kettle heat exchangers and an economizer disposed between the heat exchangers. The reflux stream originates... | 12/25/2007 |
| 7266976 | Vertical heat exchanger configuration for LNG facility LNG facility employing one or more vertical core-in-kettle heat exchangers to cool natural gas via indirect heat exchange with a refrigerant. The vertical core-in-kettle heat exchangers save plot space and can be use to reduce the size of cold boxes employed in the ... | 09/11/2007 |
| 7216507 | Liquefied natural gas processing A process and apparatus for the recovery of ethane, ethylene, propane, propylene, and heavier hydrocarbons from a liquefied natural gas (LNG) stream is disclosed. The LNG feed stream is divided into two portions. The first portion is supplied to a fractionation colu... | 05/15/2007 |
| 7210311 | Natural gas liquefaction A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled, expanded to an intermediate pressu... | 05/01/2007 |
| 7204100 | Natural gas liquefaction A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled and divided into first and second s... | 04/17/2007 |
| 7191617 | Hydrocarbon gas processing A process for the recovery of ethane, ethylene, propane, propylene, and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is cooled and divided into first and second streams. The first stream is further cooled to condense substant... | 03/20/2007 |
| 7188492 | Plate heat exchanger A plate heat exchanger for indirect heat exchange of several fluid flows (30, 40, 50) with a heat transfer medium/cooling medium (10, 20) in a heat exchanger core (9) has a plurality of heat exchange passages within the core for the heat transfe... | 03/13/2007 |
| 7169267 | Method and device for carrying out the distillative separation of C cuts A process is proposed for the separation of C5+ cuts by distillation into a low-boiler (A), a medium-boiler (B) and a high-boiler fraction (C) in one or more dividing-wall columns (TK), in which a dividing wall (T) is arranged in the longitudinal directio... | 01/30/2007 |
| 7155931 | Liquefied natural gas processing A process and apparatus for the recovery of ethane, ethylene, propane, propylene, and heavier hydrocarbons from a liquefied natural gas (LNG) stream is disclosed. The LNG feed stream is directed in heat exchanger relation with a warmer distillation stream rising fro... | 01/02/2007 |
| 7152428 | Refrigeration system A refrigeration process is disclosed that employs a mixed refrigerant to chill a process gas stream in which a second stream is cooled against rewarming vaporized mixed refrigerant at low pressure and subsequently is at least partially vaporized against at least par... | 12/26/2006 |
| 7100280 | Method for producing a heat exchanger The invention relates to a method for producing a plate heat exchanger from a plurality of heat exchanger blocks (1a, 1b). Each heat exchanger block (1a, 1b) has mounted on it a header (6a, 7 | 09/05/2006 |
| 7059152 | Nitrogen rejection method and apparatus Nitrogen is rejected from a feed natural gas stream comprising methane and nitrogen so as to form a primary methane product. The mole fraction of nitrogen in the feed natural gas increases over a period of time. The feed natural gas stream is cooled in a main heat e... | 06/13/2006 |
| 7010937 | Natural gas liquefaction A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled, expanded to an intermediate pressu... | 03/14/2006 |
| 6986266 | Process and apparatus for LNG enriching in methane Process and apparatus for separation of LNG allow both maximum enriching of the methane product in methane at any initial LNG composition, and to production the methane product in fully liquid state for the customer. ... | 01/17/2006 |
| 6978638 | Nitrogen rejection from condensed natural gas Method for the rejection of nitrogen from condensed natural gas which comprises (a) introducing the condensed natural gas into a distillation column at a first location therein, withdrawing a nitrogen-enriched overhead vapor stream from the distillation column, and ... | 12/27/2005 |
| 6945075 | Natural gas liquefaction A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled, expanded to an intermediate pressu... | 09/20/2005 |
| 6349566 | Dephlegmator system and process Dephlegmator system without headers, collectors, or distributors at the bottom end of feed circuits in plate and fin exchangers operating in condensing or rectifying service. Each dephlegmator is installed within a pressure vessel, thereby eliminating the... | 02/26/2002 |
| 6336344 | Dephlegmator process with liquid additive A cryogenic process for the separation of one light gas component from a heavier gas component in a gas feed stream, by injecting a liquid hydrocarbon additive stream into the top or upper portion of a dephlegmator-heat exchanger, to increase the rectific... | 01/08/2002 |
| 6266977 | Nitrogen refrigerated process for the recovery of C2+ Hydrocarbons C2 and C3 hydrocarbons, particularly ethylene and propylene, are recovered from refinery or petrochemical plant gas mixtures by cooling and fractionating a feed gas mixture containing these hydrocarbons and lighter components. Refrig... | 07/31/2001 |
| 6128920 | Dephlegmator A dephlegmator includes a feed gas passage and a refrigerant passage. A feed gas introduced into the feed gas passage from the bottom is heat-exchanged with a refrigerant passing through the refrigerant passage. Components having low boiling points are wi... | 10/10/2000 |
| 6023943 | Condensating-fractionating tower system An improved condensating-fractionating tower system used in the separation of gaseous mixture, comprising a dephlegmator, a column section and a tower bottom, the said dephlegmator being provided in the upper portion of the tower, is characterized in that... | 02/15/2000 |
| 5983665 | Production of refrigerated liquid methane A high purity methane product is recovered from a feed gas mixture containing methane and one or more hydrocarbons heavier than methane by cooling, condensing, and rectifying the feed in a dephlegmator. The high purity methane product, containing at least... | 11/16/1999 |
| 5899093 | Process and apparatus for the production of nitrogen by cryogenic distillation A single or double dephlegmator is used to transfer heat between condensing nitrogen and rich liquid in a single column nitrogen generator.... | 05/04/1999 |
| 5802871 | Dephlegmator process for nitrogen removal from natural gas Nitrogen is removed from a pressurized feed gas mixture containing nitrogen and methane by cooling, partial condensation, and rectification in one or more dephlegmators. Autorefrigeration is provided by pressure letdown of selected process streams and ext... | 09/08/1998 |
| 5768913 | Process based mixed refrigerants for ethylene plants A process and system for providing cooling service (refrigerant) for a gas separation process wherein the refrigerant is obtained from the system process fluid and after serving as refrigerant is returned to the process side for separation into product.... | 06/23/1998 |
| 5634354 | Olefin recovery from olefin-hydrogen mixtures Olefins are recovered from thermally cracked gas or fluid catalytic cracking off gas by cooling the gas to condense a portion of the hydrocarbons, removing hydrogen from the noncondensed gas, and condensing the remaining hydrocarbons in a cold condensing ... | 06/03/1997 |
| 5613373 | Process and apparatus for cooling a fluid especially for liquifying natural gas In this process, which incorporates an integral cascade, the coolant mixture issuing from the penultimate stage (1B) of the compressor cycle (1) is delivered to a distillation apparatus (5) the head vapor of which is cooled (in 24) to a temperature signif... | 03/25/1997 |
| 5505049 | Process for removing nitrogen from LNG A process for removing nitrogen from liquefied natural gas (LNG) using an enhanced surface, reflux heat exchanger is disclosed. A relatively warm high pressure LNG stream is directed countercurrently in heat exchange with a cool low pressure LNG stream to... | 04/09/1996 |
| 5361589 | Precooling for ethylene recovery in dual demethanizer fractionation systems Ethylene-containing feed gas to a cryogenic ethylene recovery system is cooled and condensed, prior to fractionation, by an improved method which utilizes a combination of one or more partial condensers followed by one or more dephlegmators. The improved ... | 11/08/1994 |
| 5329775 | Cryogenic helium production system A cryogenic helium production system wherein a feed which includes carbon dioxide is processed in a dual temperature system including an upstream higher temperature and higher pressure column or dephlegmator, thus eliminating the need for a separate non-c... | 07/19/1994 |
| 5287703 | Process for the recovery of C2 + or C3 + hydrocarbons A process for cooling, phase separating, rectifying and stripping a hydrocarbon containing feed gas stream to recover a heavy hydrocarbon product wherein a predominant amount of the refrigeration for the process is provided from a single loop vapor recomp... | 02/22/1994 |
| 5207065 | Separation of gas mixtures The present invention provises a method and apparatus for separating a gas mixture. In accordance therewith, the gas mixture is rectified in a dephlegmator. The dephlegmator has first and second sets of heat exchange passages which are in a heat exchange ... | 05/04/1993 |
| 5035732 | Cryogenic separation of gaseous mixtures A cryogenic technique for recovering ethene from a gaseous mixture containing methane, ethane, etc. Operating methods and apparatus are provided for passing the gas feed through a chilling train having a series of dephlegmator-type exchange units to conde... | 07/30/1991 |
| 4921514 | Mixed refrigerant/expander process for the recovery of C3+ hydrocarbons The present invention is an energy efficient process for the recovery and purification of C3+ hydrocarbons from a high pressure natural gas or refinery/petrochemical feed gas containing C3+ hydrocarbons and lig... | 05/01/1990 |
| 4900347 | Cryogenic separation of gaseous mixtures A cyrogenic technique for recovering ethene from a gaseous mixture containing methane, ethane, etc. Operating methods and apparatus are provided for passing the gas feed through a chilling train having a series of dephlegmator-type exchange units to conde... | 02/13/1990 |
| 4749393 | Process for the recovery of hydrogen/heavy hydrocarbons from hydrogen-lean feed gases The process of this invention is a hybrid gas separation process which recovers both heavy hydrocarbon and high purity hydrogen products from a gas stream containing a relatively low concentration of hydrogen. The heavy hydrocarbon product may consist of ... | 06/07/1988 |
| 4720294 | Dephlegmator process for carbon dioxide-hydrocarbon distillation A low capital cost, energy efficient process for separation of carbon dioxide, sulfide gases and hydrocarbons from carbonaceous off-gas streams, for example, oil shale retorting off-gases, coal gasification off-gases, oxygen fire flooding off-gases or car... | 01/19/1988 |
| 4714487 | Process for recovery and purification of C3 -C4+ hydrocarbons using segregated phase separation and dephlegmation A low temperature phase separation, dephlegmation and distillation process is described for resolving a light hydrocarbon gas stream to recover and purify C3+ and/or C4+ hydrocarbons. The phase separation bottoms stream is segregate... | 12/22/1987 |
| 4707170 | Staged multicomponent refrigerant cycle for a process for recovery of C+ hydrocarbons The present invention is a process for phase separating, dephlegmating and optionally distilling a feed gas stream to recover a light gas product and a heavy hydrocarbon product wherein a predominant amount of the refrigeration for the process is provided... | 11/17/1987 |
