Liquid Contact Patents (Class 62/625)
  • Patent number: 10633305
    Abstract: One or more specific embodiments disclosed herein includes a method for separating hydrogen from an olefin hydrocarbon rich compressed effluent vapor stream, employing a single heat exchanger, multiple gas-liquid separators, multiple expander/compressor sets, and a rectifier attached to a liquid product drum.
    Type: Grant
    Filed: May 21, 2017
    Date of Patent: April 28, 2020
    Assignee: Enflex, Inc.
    Inventors: James Zhao, Shukui Zhao
  • Patent number: 10464810
    Abstract: To obtain hydrogen from a gaseous C2minus feed, it is cooled from a first to a second temperature level at a first pressure level forming one or more condensates. A gaseous remainder is cooled to a third temperature level and subjected to a counterflow absorption at the first pressure level, obtaining a top gas rich in hydrogen and methane and a sump liquid. The former is heated and subjected to pressure swing adsorption at the first pressure level, forming a product stream rich in hydrogen and depleted in or free from methane. The condensate(s) and/or the sump liquid is/are expanded to and fed into a low pressure demethanizer at the second pressure level. The counterflow absorption is carried out using fluid taken from the demethanizer at the second pressure level, compressed in gaseous form to the first pressure level and cooled to the third temperature level.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: November 5, 2019
    Assignee: LINDE AKTIENGESELLSCHAFT
    Inventors: Tuat Pham Duc, Paul Kuhn
  • Patent number: 10427092
    Abstract: The invention is a process and apparatus for separating the components of a multi-component gas stream comprising light and heavier volatility components with a variable composition. The process includes contacting the multi-component gas stream with a lean solvent in an absorber to produce a light component overhead stream and a rich solvent bottoms stream, flashing the rich solvent bottoms stream in at least a first, second and third reduced constant pressure of sequentially lower pressure wherein the released gas is compressed and a part is routed back to the absorber bottoms as stripping gas and a part is routed as a part of the heavier product stream. In this invention compressed vapor from the first or second reduced constant pressure rich solvent flash vessel is split by flow control between recycle routing to the absorber bottom stage as stripping gas and to the heavier product hydrocarbon stream, depending on the feed gas concentration of light component.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: October 1, 2019
    Assignee: BRECOR HOLDINGS LLC
    Inventors: Thomas K. Gaskin, Earle R. Mowrey
  • Patent number: 10371442
    Abstract: The present invention relates to a separation method and a separation process system for easily recovering ethanol from an ethanol oligomerization reactant containing unreacted ethanol. A separation method according to the present invention may improve the economics and increase separation efficiency by easily refluxing ethylene while reducing or excluding the use of a reflux system which uses an expensive cooling medium, and the like, and may also improve process efficiency by reducing the amount of heat used by a reboiler.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: August 6, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Hoi In Jeong, Mi Kyung Kim, Jong Ku Lee, Jeong Seok Lee
  • Patent number: 10352616
    Abstract: Enhanced low temperature separation (LTS) processes are provided for separating light hydrocarbon components from heavy hydrocarbon components. The enhanced LTS process utilizes an absorber and a de-ethanizer tower to achieve sufficiently pure natural gas liquid (NGL) products and residue gas products. A portion of the de-ethanizer tower overhead is condensed and recycled as reflux for the absorber. The enhanced LTS process requires less refrigeration of the feed gas stream yet still achieves increased recovery of the valuable heavier hydrocarbons from hydrocarbon gas streams. The enhanced LTS process also reduces compression requirements compared to conventional LTS processes.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: July 16, 2019
    Assignee: Black & Veatch Holding Company
    Inventor: Kevin L. Currence
  • Patent number: 10240781
    Abstract: An apparatus and method for reclaiming uncondensed hydrocarbons normally exhausted to the atmosphere from a still column of a glycol dehydrator system, and combusting the uncondensed hydrocarbons in a burner assembly of a reboiler after the burner assembly has been ignited by fuel gas.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: March 26, 2019
    Inventors: D. Jeffrey Hill, J. Scott Hill, E. Todd Wiggins
  • Patent number: 10215485
    Abstract: In a method and apparatus for treating a hydrocarbon stream having methane, at least a part of the hydrocarbon stream and a main refrigerant stream are cooled by indirect heat exchanging against a pre-cooling refrigerant. The pre-cooled hydrocarbon stream is passed to a first inlet of an extraction column, and an effluent stream is discharged from the extraction column. The effluent stream and at least a part of the pre-cooled main refrigerant stream are passed to a further heat exchanger, where they are both cooled thereby providing a cooled methane-enriched hydrocarbon stream and at least one cooled main refrigerant stream. The passing of the effluent stream to the further heat exchanger and the passing of the pre-cooled hydrocarbon stream to the first inlet of the extraction column includes indirectly heat exchanging the effluent stream against the pre-cooled hydrocarbon stream.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: February 26, 2019
    Assignee: SHELL OIL COMPANY
    Inventors: Francois Chantant, Wouter Jan Meiring
  • Patent number: 10082331
    Abstract: Process for efficiently operating a natural gas liquefaction system with integrated heavies removal/natural gas liquids recovery to produce liquefied natural gas (LNG) and/or natural gas liquids (NGL) products.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: September 25, 2018
    Assignee: CONOCOPHILLIPS COMPANY
    Inventors: Megan V. Evans, Nasir Ali, Jon M. Mock, Jame Yao, Sriram Ramani
  • Patent number: 9844751
    Abstract: The invention relates to a method for removing absorbable gases from pressurized industrial gases contaminated with absorbable gases, without supplying cooling energy. The method includes an industrial gas that is to be purified is purified by an absorbent solvent, the absorbable gases situated therein being removed by the solvent, and the loaded solvent is passed to a stripping stage in which the absorbed gas is desorbed again, and the desorbed gas is compressed, in such a manner that it is heated by the compression, whereupon it is cooled to standard temperature by means of cooling water or cooling air, then expanded, in such a manner that it cools and this cooled desorption gas is again returned to the industrial gas, in such a manner that said industrial gas is also cooled by the admixture.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: December 19, 2017
    Assignee: ThyssenKrupp Industrial Solutions AG
    Inventor: Johannes Menzel
  • Patent number: 9791210
    Abstract: Systems and methods are provided for recovering helium from a feed comprising helium, carbon dioxide, and at least one intermediate component having a volatility between those of helium and carbon dioxide. In particular, processes of the present invention comprise separating the carbon dioxide and the components of intermediate volatility from the helium at a temperature greater than ?82.7° C. to form a helium-rich product stream, wherein the concentration of at least one of the intermediate components in the helium-rich product stream is lower than its concentration in the feed stream, and wherein at least part of the separation is effected by contacting a vapor with a liquid.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: October 17, 2017
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Paul Higginbotham, Vincent White, John Eugene Palamara
  • Patent number: 9725644
    Abstract: Y-Grade NGL fracturing systems and methods of using Y-Grade NGL stimulation fluids.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: August 8, 2017
    Assignee: LINDE AKTIENGESELLSCHAFT
    Inventors: John A. Babcock, Marcus Guzmann
  • Patent number: 9534837
    Abstract: A process for recovery of natural gas liquids is disclosed, the process including: fractionating a gas stream comprising nitrogen, methane, ethane, and propane and other C3+ hydrocarbons into at least two fractions including a light fraction comprising nitrogen, methane, ethane, and propane, and a heavy fraction comprising propane and other C3+ hydrocarbons; separating the light fraction into at least two fractions including a nitrogen-enriched fraction and a nitrogen-depleted fraction in a first separator; separating the nitrogen-depleted fraction into a propane-enriched fraction and a propane-depleted fraction in a second separator; feeding at least a portion of the propane-enriched fraction to the fractionating as a reflux; recycling at least a portion of the propane-depleted fraction to the first separator. In some embodiments, the nitrogen-enriched fraction may be separated in a nitrogen removal unit to produce a nitrogen-depleted natural gas stream and a nitrogen-enriched natural gas stream.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: January 3, 2017
    Assignee: Lummus Technology Inc.
    Inventor: Michael Malsam
  • Patent number: 9513050
    Abstract: The invention relates to an apparatus for the distillation separation of a mixture containing, as the main components thereof, carbon dioxide and at least one other fluid selected from the group containing nitrogen, oxygen, argon, hydrogen, methane, carbon monoxide, said apparatus comprising a distillation column (8), a condenser (9), a reboiler (7, 11), means for conveying the mixture to be separated to the column or the condenser, means for conveying a head gas from the column to the condenser, and means for conveying a liquid condensed in the condenser into the head of the column. The condenser is formed by an exchanger with plates and blades made from brazed aluminum and having an exchange surface area per m3 of exchanger greater than 400 m2/m3, with ammonia being used as refrigerant.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: December 6, 2016
    Assignee: L'Air Liquide Société Anonyme Pour L'Étude Et L'Exploitation Des Procedes Georges Claude
    Inventors: Bruno Berthome, Laurent Perru, Fabrice Rivoal
  • Patent number: 9266059
    Abstract: A contaminant gas is removed from a feed gas in two absorption and stripping circuits operated in tandem. The gas is first passed through a rich gas absorber producing a rich absorption liquor from which contaminant gas is stripped in a rich liquor stripper. A lean gas exiting the rich gas absorber is passed through a lean gas absorber, producing a lean absorption liquor from which contaminant gas is stripper in a lean liquor stripper. Regenerated absorption media exiting the respective strippers are recirculated to the respective absorbers.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: February 23, 2016
    Assignee: MECS, INC.
    Inventor: Ernesto Vera-Castañeda
  • Patent number: 9074815
    Abstract: A process for recovery of natural gas liquids is disclosed, the process including: fractionating a gas stream comprising nitrogen, methane, ethane, and propane and other C3+ hydrocarbons into at least two fractions including a light fraction comprising nitrogen, methane, ethane, and propane, and a heavy fraction comprising propane and other C3+ hydrocarbons; separating the light fraction into at least two fractions including a nitrogen-enriched fraction and a nitrogen-depleted fraction in a first separator; separating the nitrogen-depleted fraction into a propane-enriched fraction and a propane-depleted fraction in a second separator; feeding at least a portion of the propane-enriched fraction to the fractionating as a reflux; recycling at least a portion of the propane-depleted fraction to the first separator. In some embodiments, the nitrogen-enriched fraction may be separated in a nitrogen removal unit to produce a nitrogen-depleted natural gas stream and a nitrogen-enriched natural gas stream.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: July 7, 2015
    Assignee: Lummus Technology Inc.
    Inventor: Michael Malsam
  • Patent number: 8959952
    Abstract: The invention relates to a method for separating a mixture comprising at least carbon monoxide, hydrogen, and methane. According to said method, the mixture is separated by a first separating means, at least one liquid fraction of the chamber of the separating means is sent to a product stripper, and at least part of the liquid fraction is sent from the product stripper to a CO/CH4 separating column in order to produce a methane-enriched liquid flow and a gaseous flow enriched with carbon monoxide. The process is carried out under cold conditions at least partially as a result of a carbon monoxide cycle, said cycle at least partially ensuring the condensation at the top of the CO/CH4 separating column and/or the reboiling in the chamber of the product stripper and/or the reboiling in the chamber of the CO/CH4 separating column and/or the cooling of the mixture for the first separating means.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: February 24, 2015
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Arthur Darde, Natacha Haik-Beraud, Antoine Hernandez, Guillaume Teixeira
  • Patent number: 8821615
    Abstract: The disclosure relates to a process for treating a gas mixture containing carbon dioxide and hydrogen sulphide, including the following steps: deacidificating the gas mixture by bringing the gas mixture into contact with a first lean absorbent solution stream, delivering a deacidified gas mixture, and a first rich absorbent solution stream; regenerating the first rich absorbent solution stream, delivering the first lean absorbent solution stream and a sour gas stream; distillating the sour gas stream, delivering a first carbon-dioxide-rich stream and a hydrogen-sulphide-rich stream; purifying the first carbon-dioxide-rich stream by bringing the first carbon-dioxide-rich stream into contact with a second lean absorbent solution stream, delivering a second carbon-dioxide-rich stream and a second rich absorbent solution stream, the molar concentration of carbon dioxide in the second carbon-dioxide-rich stream being greater than the molar concentration of carbon dioxide in the first carbon-dioxide-rich stream.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: September 2, 2014
    Assignee: Total S.A.
    Inventors: Claire Weiss, Renaud Cadours, Kamal Bouzalmata
  • Patent number: 8640495
    Abstract: A process and apparatus for producing a carbon monoxide-containing product from a feed containing hydrogen, carbon monoxide, methane, nitrogen and optionally argon. The carbon monoxide-containing product is produced using a hydrogen stripping column for forming a hydrogen-enriched vapor and a hydrogen-freed liquid, a nitrogen separation fractionator for forming a nitrogen-enriched vapor and a nitrogen-depleted liquid containing carbon monoxide and methane from the hydrogen-freed liquid, and a carbon monoxide/methane separation fractionator for forming the carbon monoxide containing product and a methane-enriched liquid from the nitrogen-depleted liquid. At least part of the nitrogen separation fractionator condenser duty provides the feed vaporization duty and reboiler duty for the carbon monoxide/methane separation fractionator, thereby reducing the energy requirement for the separation.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: February 4, 2014
    Assignee: Ait Products and Chemicals, Inc.
    Inventor: Brian Alfred McNeil
  • Patent number: 8590340
    Abstract: A process and apparatus 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 substantially all of it and is thereafter expanded to the pressure of a fractionation tower and supplied to the fractionation tower at a first mid-column feed position. The second stream is expanded to the tower pressure and is then supplied to the column at a second mid-column feed position. A distillation vapor stream is withdrawn from the column below the feed point of the first stream and compressed to an intermediate pressure, and is then directed into heat exchange relation with the tower overhead vapor stream to cool the distillation stream and condense substantially all of it, forming a condensed stream.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: November 26, 2013
    Assignee: Ortoff Engineers, Ltd.
    Inventors: Richard N. Pitman, John D. Wilkinson, Joe T. Lynch, Hank M. Hudson, Tony L. Martinez
  • Patent number: 8555673
    Abstract: The invention relates to a method and apparatus for separating a mixture containing carbon monoxide, nitrogen and hydrogen by cryogenic distillation in a separation system which includes a denitrification column and at least another column. The method can include separating the mixture in order to obtain a fluid enriched with carbon monoxide and containing nitrogen, separating the fluid in the denitrification column, pressurizing the carbon monoxide flow from the column in a compressor up to a high pressure, collecting a fraction of carbon monoxide flow to be used as a product, expanding an amount of the high-pressure carbon monoxide flow in a valve prior to supplying it to the denitrification column, and varying the flow expanded in the valve according to re-boiling needs of the denitrification column.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: October 15, 2013
    Assignee: L'Air Liquide, Société pour l'Étude et l'Éxploitation des Procédés Georges Claude
    Inventors: Arthur Darde, Antoine Hernandez
  • Publication number: 20120240617
    Abstract: The disclosure relates to a process for treating a gas mixture containing carbon dioxide and hydrogen sulphide, including the following steps: deacidificating the gas mixture by bringing the gas mixture into contact with a first lean absorbent solution stream, delivering a deacidified gas mixture, and a first rich absorbent solution stream; regenerating the first rich absorbent solution stream, delivering the first lean absorbent solution stream and a sour gas stream; distillating the sour gas stream, delivering a first carbon-dioxide-rich stream and a hydrogen-sulphide-rich stream; purifying the first carbon-dioxide-rich stream by bringing the first carbon-dioxide-rich stream into contact with a second lean absorbent solution stream, delivering a second carbon-dioxide-rich stream and a second rich absorbent solution stream, the molar concentration of carbon dioxide in the second carbon-dioxide-rich stream being greater than the molar concentration of carbon dioxide in the first carbon-dioxide-rich stream.
    Type: Application
    Filed: June 25, 2010
    Publication date: September 27, 2012
    Applicant: TOTAL S.A.
    Inventors: Claire Weiss, Renaud Cadours, Kamal Bouzalmata
  • Publication number: 20120103013
    Abstract: Dividing wall fractional distillation columns and methods of operating these columns with greater flexibility, especially in terms of the ability to adjust the composition of the heartcut, intermediate or sidecut product fraction, are described. In particular, this composition may be advantageously “biased” toward higher or lower molecular weight components, depending on operating needs. Changes in feedstock composition may also be managed more effectively. These benefits are obtained by varying the flow rate of vapor and liquid to each side of the dividing wall. The vapor flowrate rising from an undivided portion of the column interior below the dividing wall is varied to the feed and/or product sections on opposite sides of the dividing wall. Also, the liquid flowrate falling from an undivided portion of the column interior above the dividing wall is varied to the feed and/or product sections on opposite sides of the dividing wall.
    Type: Application
    Filed: October 28, 2010
    Publication date: May 3, 2012
    Applicant: UOP LLC
    Inventors: STEPHEN THOMAS KING, Joe Haas
  • Publication number: 20120000246
    Abstract: A process for the recovery of heavier hydrocarbons from a liquefied natural gas (LNG) stream and a hydrocarbon gas stream is disclosed. The LNG feed stream is heated to vaporize at least part of it, then expanded and supplied to a fractionation column at a first mid-column feed position. The gas stream is expanded and cooled, then supplied to the column at a second mid-column feed position. A distillation vapor stream is withdrawn from the fractionation column below the mid-column feed positions and directed in heat exchange relation with the LNG feed stream, cooling the distillation vapor stream as it supplies at least part of the heating of the LNG feed stream. The distillation vapor stream is cooled sufficiently to condense at least a part of it, forming a condensed stream. At least a portion of the condensed stream is directed to the fractionation column as its top feed.
    Type: Application
    Filed: May 15, 2009
    Publication date: January 5, 2012
    Applicant: Ortloff Engineers, Ltd.
    Inventors: Tony L. Martinez, John D. Wilkinson, Hank M. Hudson, Kyle T. Cuellar
  • Patent number: 7973209
    Abstract: Processing schemes and arrangements for the catalytic cracking of a heavy hydrocarbon feedstock and obtaining light olefins substantially free of carbon dioxide via amine treatment and employing fractionation processing are provided.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: July 5, 2011
    Assignee: UOP LLC
    Inventors: Gavin P. Towler, John P. Brady, William J. Lechnick, Michael A. Schultz
  • Patent number: 7883569
    Abstract: Produced natural gas containing carbon dioxide is dehydrated and chilled to liquefy the carbon dioxide and then fractionated to produce a waste stream of liquid carbon dioxide and hydrogen sulfide. Natural gas liquids may be first separated and removed before fractionation. After fractionation, the waste stream is pressurized and transmitted to a remote injection well for injection either for disposal of the waste stream and preferably to urge hydrocarbons toward the producing well. A hydrocarbon stream proceeds from fractionation to a methanol absorber system which removes carbon dioxide gas. The hydrocarbon stream is thereafter separated into at least hydrocarbon gas, nitrogen and helium. Some of the nitrogen is reintroduced into a fractionation tower to enhance the recovery of hydrocarbons. A methanol recovery system is provided to recover and reuse the methanol. The hydrocarbons are sold as natural gas; and the helium is recovered and sold. Excess nitrogen is vented.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: February 8, 2011
    Inventor: Donald Leo Stinson
  • Patent number: 7875759
    Abstract: A process for extracting natural gas liquids (NGLs) from natural gas that involves contacting natural gas from one source with crude, or heavy, oil from a different source under conditions that promote enrichment of the crude or heavy oil with NGLs from the natural gas. Apart from functioning as an absorbent fluid, the crude or heavy oil also functions as the carrier medium for the absorbed. NGLs. When practicing the process, unlike conventional methods, there is no need to regenerate the absorbent fluid, in this case the crude and heavy oil, for recycling.
    Type: Grant
    Filed: November 3, 2005
    Date of Patent: January 25, 2011
    Inventor: Rafael Bin Mohd Shamsudin
  • Publication number: 20100287985
    Abstract: A process for the recovery of heavier hydrocarbons from a liquefied natural gas (LNG) stream and a hydrocarbon gas stream is disclosed. The LNG feed stream is heated to vaporize at least part of it, then expanded and supplied to a fractionation column at a first mid-column feed position. The gas stream is expanded and cooled, then supplied to the column at a second mid-column feed position. A distillation vapor stream is withdrawn from the fractionation column below the mid-column feed positions and directed in heat exchange relation with the LNG feed stream, cooling the distillation vapor stream as it supplies at least part of the heating of the LNG feed stream. The distillation vapor stream is cooled sufficiently to condense at least a part of it, forming a condensed stream. At least a portion of the condensed stream is directed to the fractionation column as its top feed.
    Type: Application
    Filed: May 15, 2009
    Publication date: November 18, 2010
    Applicant: Ortloff Engineers, Ltd.
    Inventors: Tony L. Martinez, John D. Wilkinson, Hank M. Hudson, Kyle T. Cuellar
  • Publication number: 20100281916
    Abstract: The present invention concerns a process for removing acidic contaminants and C2+-hydrocarbons from a feed gas stream (1) containing methane and acidic contaminants and C2+-hydrocarbons, the process comprising cooling (2) the feed gas stream to a temperature at which solid acidic contaminants are formed and a liquid comprising C2+-hydrocarbons and acidic contaminants as well as a methane enriched gaseous phase, separating (3) a gaseous stream (5) from the solids and liquid, introducing solids and liquid in the upper part of a separation/washing zone (4), the separation/washing zone comprising a downwardly moving bed of solids and removing solids at the lower end of the separation/washing zone, separating liquid from the solids through one or more openings (9) at a position between the upper part and the lower end of the separation/washing zone, and introducing at a position below the one or more openings an upwardly moving washing liquid.
    Type: Application
    Filed: January 9, 2009
    Publication date: November 11, 2010
    Inventor: Rick Van Der Vaart
  • Patent number: 7806965
    Abstract: Produced natural gas containing carbon dioxide is dehydrated and chilled to liquefy the carbon dioxide and then fractionated to produce a waste stream of liquid carbon dioxide and hydrogen sulfide. Natural gas liquids may be first separated and removed before fractionation. After fractionation, the waste stream is pressurized and transmitted to a remote injection well for injection either for disposal of the waste stream and preferably to urge hydrocarbons toward the producing well. A hydrocarbon stream proceeds from fractionation to a methanol absorber system which removes carbon dioxide gas. The hydrocarbon stream is thereafter separated into at least hydrocarbon gas, nitrogen and helium. Some of the nitrogen is reintroduced into a fractionation tower to enhance the recovery of hydrocarbons. A methanol recovery system is provided to recover and reuse the methanol. The hydrocarbons are sold as natural gas and the helium is recovered and sold. Excess nitrogen is vented.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: October 5, 2010
    Inventor: Donald Leo Stinson
  • Publication number: 20100223952
    Abstract: A process and apparatus for producing a carbon monoxide-containing product from a feed containing hydrogen, carbon monoxide, methane, nitrogen and optionally argon. The carbon monoxide-containing product is produced using a hydrogen stripping column for forming a hydrogen-enriched vapor and a hydrogen-freed liquid, a nitrogen separation fractionator for forming a nitrogen-enriched vapor and a nitrogen-depleted liquid containing carbon monoxide and methane from the hydrogen-freed liquid, and a carbon monoxide/methane separation fractionator for forming the carbon monoxide containing product and a methane-enriched liquid from the nitrogen-depleted liquid. At least part of the nitrogen separation fractionator condenser duty provides the feed vaporization duty and reboiler duty for the carbon monoxide/methane separation fractionator, thereby reducing the energy requirement for the separation.
    Type: Application
    Filed: March 3, 2009
    Publication date: September 9, 2010
    Applicant: AIR PRODUCTS AND CHEMICALS, INC.
    Inventor: Brian Alfred McNeil
  • Patent number: 7713497
    Abstract: A natural gas liquid plant includes a separator (103) that receives a cooled low pressure feed gas (4), wherein the separator (103) is coupled to an absorber (108) and a demethanizer (110). Refrigeration duty of the absorber (108) and demethanizer (110) are provided at least in part by expansion of a liquid portion of the cooled low pressure feed gas (4) and an expansion of a liquid absorber bottom product (19), wherein ethane recovery is at least 85 mol % and propane recovery is at least 99 mol %. Contemplated configurations are especially advantageous as upgrades to existing plants with low pressure feed gas where high ethane recovery is desirable.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: May 11, 2010
    Assignee: Fluor Technologies Corporation
    Inventor: John Mak
  • Publication number: 20100071411
    Abstract: A method for separating a mixture of carbon monoxide, nitrogen, hydrogen and optionally methane by cryogenic distillation.
    Type: Application
    Filed: December 12, 2007
    Publication date: March 25, 2010
    Applicant: L'Air Liquide SocieteAnonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
    Inventors: Arthur Darde, Antoine Hernandez
  • Publication number: 20100024477
    Abstract: The separation of methane from an admixture (110) with ethane and higher hydrocarbons, especially natural gas, using a scrub column (114), in which the admixture is separated into a methane-rich overhead (116) that is partially condensed (122) to provide reflux to the column (114) and liquid methane-depleted bottoms liquid (126), is improved by providing additional reflux (136) derived from an ethane enriched stream (130) from fractionation (128) of the bottoms liquid. Preferably, absorber liquid (140) from the fractionation (128) also is introduced into the scrub column. The vapor fraction (120) remaining after partial condensation can be liquefied (122) to provide LNG product (124).
    Type: Application
    Filed: September 30, 2009
    Publication date: February 4, 2010
    Applicant: AIR PRODUCTS AND CHEMICALS, INC.
    Inventors: Mark Julian Roberts, Adam Adrian Brostow
  • Publication number: 20100000255
    Abstract: Contemplated configurations and methods for gas processing use a refluxed absorber that receives a liquid and a vapor hydrocarbon feed. The absorber further receives a stripping medium that is at least in part formed from a vapor portion of a stabilizer overhead and also receives a scrubbing medium that is at least in part formed from a liquid portion of the stabilizer overhead. Most preferably, the absorber overhead is maintained at a temperature near or even below the hydrate point of the feed.
    Type: Application
    Filed: November 6, 2007
    Publication date: January 7, 2010
    Applicant: FLUOR TECHNOLOGIES CORPORATION
    Inventor: John Mak
  • Publication number: 20090293539
    Abstract: A method and apparatus for producing carbon monoxide by cryogenic distillation is provided.
    Type: Application
    Filed: January 10, 2008
    Publication date: December 3, 2009
    Applicant: L'Air Liquide Societe Anonyme Pour L'Etude Et L'Explotation Des Procedes Georges Claude
    Inventors: Alain Briglia, Philippe Court, Natacha Haik-Beraud, Antoine Hernandez, Christian Monereau
  • Patent number: 7617701
    Abstract: In a process for producing a mixture containing at least 10% carbon monoxide (73) by cryogenic separation of a feed gas containing at least carbon monoxide, hydrogen and methane, the feed gas (1) is separated to produce a first gas enriched in hydrogen (71), the feed gas is scrubbed in a methane wash column (7), a carbon monoxide enriched stream (13) from the bottom of the methane wash column is separated (19) to produce a stream further enriched in carbon monoxide (23), the stream further enriched in carbon monoxide is separated to form a carbon monoxide rich stream (31,49) and a liquid methane stream (27), at least part (72) of the carbon monoxide rich stream is mixed with the first gas enriched in hydrogen to form the mixture containing at least 10% carbon monoxide as a product stream.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: November 17, 2009
    Assignee: L'Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Jean Billy, Natacha Haik-Beraud, Jean Gallarda, Franck Wegrzyn
  • Patent number: 7600395
    Abstract: A process and apparatus for the liquefaction of natural gas including an improved heavy hydrocarbon removal column with overhead condensing and refluxing. Particularly, a methane-rich stream exiting a propane refrigerant cycle is delivered to a heavies removal column, and the heavies depleted vapor from the column is at least partially condensed and the liquid portion provided as reflux to the heavies removal column.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: October 13, 2009
    Assignee: ConocoPhillips Company
    Inventors: Anthony P. Eaton, Bobby D. Martinez, Jame Yao
  • Patent number: 7565815
    Abstract: 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 pressure, and supplied to a distillation column. The bottom product from this distillation column preferentially contains the majority of any hydrocarbons heavier than methane that would otherwise reduce the purity of the liquefied natural gas. The residual gas stream from the distillation column is compressed to a higher intermediate pressure, cooled under pressure to condense it, and then expanded to low pressure to form the liquefied natural gas stream.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: July 28, 2009
    Assignee: Ortloff Engineers, Ltd.
    Inventors: John D. Wilkinson, Hank M. Hudson, Kyle T. Cuellar
  • Patent number: 7530236
    Abstract: An apparatus and process for removing natural gas liquids from an liquid natural gas (LNG) stream, specifically recovering at least 90% of ethane from the LNG, utilizing the low-level heat available in an LNG terminal.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: May 12, 2009
    Inventor: Rajeev Nanda
  • Publication number: 20090100862
    Abstract: 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 substantially all of it and is thereafter expanded to the fractionation tower pressure and supplied to the fractionation tower at a first mid-column feed position. The second stream is expanded to the tower pressure and is then supplied to the column at a second mid-column feed position. A vapor distillation stream is withdrawn from the column above the feed point of the second stream and is then directed into heat exchange relation with the tower overhead vapor stream to cool the vapor distillation stream and condense at least a part of it, forming a condensed stream. At least a portion of the condensed stream is directed to the fractionation tower as its top feed.
    Type: Application
    Filed: September 8, 2008
    Publication date: April 23, 2009
    Applicant: ORTLOFF ENGINEERS, LTD.
    Inventors: John D. Wilkinson, Joe T. Lynch, Hank M. Hudson, Kyle T. Cuellar, Tony L. Martinez
  • Patent number: 7470359
    Abstract: The method enables the antihydrate compounds contained in a condensed-hydrocarbon liquid feedstock arriving through pipe 1 to be extracted. The liquid feedstock is brought into contact, in zone ZA, with a non-aqueous ionic liquid having the general formula Q+ A31 , where Q+ designates an ammonium, phosphonium, and/or sulfonium cation, and A31 designates an anion able to form a liquid salt. The antihydrate compounds in the liquid hydrocarbon feedstock evacuated through pipe 2 are eliminated. The ionic liquid charged with antihydrate compounds is evacuated through pipe 3, then introduced into evaporator DE to be heated in order to evaporate the antihydrate compounds. The regenerated ionic liquid is recycled through pipes 8 and 9 to zone ZA. The antihydrates are evacuated through pipe 7a.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: December 30, 2008
    Assignee: Institut Francais du Petrole
    Inventors: Renaud Cadours, Fabrice Lecomte, Lionel Magna, Cécile Barrere-Tricca
  • Patent number: 7424808
    Abstract: A plant includes an absorber (105) that receives a feed gas (10) at a pressure of at least 400 psig and comprising at least 5 mol % carbon dioxide, wherein the absorber (105) is operated at an isothermal or decreasing top-to-bottom thermal gradient, and wherein the absorber (105) employs a physical solvent to at least partially remove an acid gas from the feed gas (10). Such configuration advantageously provide cooling (108) by expansion of the rich solvent (21) generated in the absorber (105), wherein both a semi-rich solvent (13) generated and recycled to the absorber (105) and the feed gas (10) are cooled by expansion of the rich solvent (21).
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: September 16, 2008
    Assignee: Fluor Technologies Corporation
    Inventor: John Mak
  • Patent number: 7337631
    Abstract: A process for separating the components of a multi-component gas stream is disclosed. The multi-component gas stream is contacted with a solvent in an extractor at cryogenic temperatures to produce an overhead stream enriched with unabsorbed component(s) and a rich solvent bottoms stream enriched with absorbed component(s). The rich solvent bottoms stream is then flash evaporated to regenerate the lean solvent and to recover the absorbed component(s) as an overhead stream, which is compressed to produce a product stream. The regenerated solvent is recycled to the extractor.
    Type: Grant
    Filed: March 9, 2005
    Date of Patent: March 4, 2008
    Assignee: Advanced Extraction Technologies, Inc.
    Inventor: Thomas K. Gaskin
  • Patent number: 7316127
    Abstract: A process for the recovery of ethane and heavier hydrocarbon components from a hydrocarbon feed gas stream. Feed gas stream is cooled into a first and second cooled streams. First and second cooled streams are sent to a cold absorber and separated into a first gas stream and a first liquid stream. First gas stream is expanded and sent to a fractionation tower. At least a part of the first liquid stream is sent to a pre-demethanizer stripper tower. Stripper tower produces a stripper overhead stream and a stripper bottoms stream. Stripper overhead vapor stream is cooled and sent to the fractionation tower as second reflux stream. Stripper bottoms stream is supplied to the fractionation tower. Temperatures and pressures of the streams and columns are maintained to recover a major portion of ethane and heavier hydrocarbon components as a bottoms product stream, and produce a residue gas stream at the fractionation tower overhead.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: January 8, 2008
    Assignee: ABB Lummus Global Inc.
    Inventors: Robert R. Huebel, Jorge H. Foglietta, Sanjiv N. Patel
  • Patent number: 7259288
    Abstract: A process for the recovery of high purity hydrogen for recycling to a hydroprocessing or similar unit located in an integrated refinery facility includes sampling and providing analytical information on the make-up of the hydrogen-containing feedstream entering the bottom of a stripping column and the composition of the hydrogen recycle stream at, and/or approaching the top of the stripping column to a computer-directed control system in real time for the purpose of controlling the selection and the volumetric flow rate of one or more “refinery solvents” into the column to maximize the removal of non-hydrogen gases from the feedstream and to thereby maximize the percentage of hydrogen in the recycle gas stream.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: August 21, 2007
    Assignee: Saudi Arabian Oil Company
    Inventor: Rashid Khan
  • Patent number: 7159417
    Abstract: A process and apparatus for the recovery of ethane and heavier components from a hydrocarbon feed gas stream. Feed gas stream is cooled and separated into a vapor stream and a condensed stream. Vapor stream is divided into a first and a second gas streams. First gas stream is expanded and sent to a fractionation tower. Second gas stream is supplied to an absorber tower. At least a part of the first liquid stream is cooled and sent to the absorber. Absorber column produces a lean vapor stream and a second condensed stream. Lean vapor stream is cooled and sent to the fractionation tower. Second condensed stream is subcooled and supplied to the fractionation tower. Temperatures and pressures of the streams and columns are maintained to recover a major portion of ethane and heavier hydrocarbon components as bottom product, and produce at the fractionation tower overhead, a residue gas stream.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: January 9, 2007
    Assignee: ABB Lummus Global, Inc.
    Inventors: Jorge H. Foglietta, Sanjiv N. Patel
  • Patent number: 7155931
    Abstract: 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 from the fractionation stages of a distillation column, whereby the LNG feed stream is partially heated and the distillation stream is partially condensed. The partially condensed distillation stream is separated to provide volatile residue gas and a reflux stream, whereupon the reflux stream is supplied to the column at a top column feed position. A portion of the partially heated LNG feed stream is supplied to the column at an upper mid-column feed point, and the remaining portion is heated further to partially or totally vaporize it and thereafter supplied to the column at a lower mid-column feed position.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: January 2, 2007
    Assignee: Ortloff Engineers, Ltd.
    Inventors: John D. Wilkinson, Hank M. Hudson
  • Patent number: 7121115
    Abstract: The invention relates to a method for treating a natural gas, saturated or not with water, containing essentially hydrocarbons, a substantial amount of hydrogen sulfide and possibly carbon dioxide. The method of the invention comprises a condensation stage intended to condense a major part of the water, a distillation stage wherein a gaseous effluent depleted in hydrogen sulfide and substantially free of water is recovered, and a contacting stage wherein the gaseous effluent from the previous stage is contacted with a solvent so as to obtain a treated gas substantially free of hydrogen sulfide and possibly of carbon dioxide.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: October 17, 2006
    Assignee: Institut Francais du Petrole
    Inventors: Eric Lemaire, Fabrice Lecomte
  • Patent number: 7107788
    Abstract: A process and apparatus to increase the recovery of ethane, propane, and heavier compounds from a hydrocarbon gas stream is provided. The process can be configured to recover ethane and heavier compounds or propane and heavier compounds, depending upon the market conditions. The process utilizes an additional reflux stream to the absorber column that is lean in ethane and propane compared to the deethanizer overhead. The additional reflux stream is taken as a side stream of the residue gas stream that is cooled, condensed, and then fed at the top of the absorber to enhanced C3+ recovery. The additional lean reflux stream can also be taken as a side stream of the first vapor stream from the cold separator.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: September 19, 2006
    Assignee: ABB Lummus Global, Randall Gas Technologies
    Inventors: Sanjiv Patel, Jorge H. Foglietta
  • Patent number: 7073350
    Abstract: A gas processing plant has a de-ethanizer and a refluxed absorber, wherein the absorber operates at higher pressure than the de-ethanizer, and wherein at least a portion of the absorber bottoms product is expanded to provide cooling for the absorber reflux stream and/or the distillation column feed stream. Especially contemplated gas processing plants include propane and ethane recovery plants, and where the gas processing plant is an ethane recovery plant, it is contemplated that the ethane product comprises no more than 500 ppm carbon dioxide.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: July 11, 2006
    Assignee: Fluor Technologies Corporation
    Inventor: John Mak