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7377127 |
Configuration and process for NGL recovery using a subcooled absorption reflux process
An NGL recovery plant includes a demethanizer ( 7 ) in which internally generated and subcooled lean oil absorbs CO 2 and C 2 from a gas stream ( 11 ), thereby preventing build-up and freezing...
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7373790 |
Nitrogen rejection method and apparatus
Nitrogen is rejected from a pressurized feed gas stream comprising methane and nitrogen by cooling the feed gas stream in a main heat exchanger and rectifying the cooled feed gas stream in a double...
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7357003 |
Process and apparatus for separation of hydrocarbons
There are provided a process for separation of hydrocarbons including the steps of: (a) a feed gas is cooled and partly condensed, and separated into a gas and a liquid; (b) the liquid obtained in...
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7310972 |
Process and apparatus for separation of hydrocarbons from liquefied natural gas
An apparatus and process for separating a feed liquefied natural gas containing at least methane and a hydrocarbon less volatile the methane, into a product natural gas enriched with methane and...
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7219513 |
Ethane plus and HHH process for NGL recovery
The present invention relates to methods for separating and recovering ethane, propane and heavier components from a feed gas, e.g. raw natural gas or a refinery or petroleum plant gas stream or a...
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7127915 |
Nitrogen rejection method and apparatus
Nitrogen is rejected from a pressurised feed gas stream comprising methane and nitrogen by cooling the feed gas stream in a main heat exchanger 10 and rectifying the cooled feed gas stream in a...
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7051552 |
Configurations and methods for improved NGL recovery
Feed gas ( 1 ) in an improved NGL processing plant is cooled below ambient temperature and above hydrate point of the feed gas to condense heavy components ( 6 ) and a significant portion of water...
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6915662 |
Hydrocarbon gas processing
A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. In recent years, the preferred method of separating...
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6898949 |
Method for refrigerating liquefied gas and installation therefor
The invention concerns a method for refrigerating liquefied natural gas under pressure ( 1 ), comprising a first step wherein the LNG ( 1 ) is cooled, expanded and separated (a) in a first base...
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6889523 |
LNG production in cryogenic natural gas processing plants
A process for liquefying natural gas in conjunction with processing natural gas to recover natural gas liquids (NGL) is disclosed. In the process, the natural gas stream to be liquefied is taken...
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6658893 |
System and method for liquefied petroleum gas recovery
An improved process for recovery of liquefied petroleum gas from a raw natural gas feed stream, capable of achieving ultra high propane recovery yields, thereby separating substantially all of the...
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6601406 |
Methods and apparatus for high propane recovery
Methods and configurations for improved propane recovery plant employ an absorber column, and a deethanizer column with an overhead condenser that produces a reflux condensate. The reflux...
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6581410 |
Low temperature separation of hydrocarbon gas
The invention provides a process for the separation of a heavier hydrocarbon fraction from a gaseous feed comprising a mixture of hydrocarbons, which process comprises subjecting the feed to a...
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6526777 |
LNG production in cryogenic natural gas processing plants
A process for liquefying natural gas in conjunction with processing natural gas to recover natural gas liquids (NGL) is disclosed. In the process, the natural gas stream to be liquefied is taken...
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6453698 |
Flexible reflux process for high NGL recovery
A process for enhancing the recovery of less volatile components, from a multi component gas mixture, in a cryogenic distillation column, which involves withdrawing a stream from the cryogenic...
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6425266 |
Low temperature hydrocarbon gas separation process
Method for separating a pressurized hydrocarbon mixture containing at least a more volatile component and a less volatile component. The method comprises (a) cooling and partially condensing the...
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6363744 |
Hydrocarbon separation process and apparatus
A process is described for separating the heavier hydrocarbons from a gaseous hydrocarbon feed wherein a first separator is employed to separate partially condensed gaseous feed and wherein the...
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6266976 |
Cryogenic H2 and carbon monoxide production with an impure carbon monoxide expander
A process for obtaining purified carbon monoxide from a gaseous mixture of hydrogen and carbon monoxide and one or more additional impurities to be removed by one or more vapor-liquid separation...
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6244070 |
Lean reflux process for high recovery of ethane and heavier components
A simple, efficient, and cost effective process for separating components of a feed gas, e.g., containing methane and heavier hydrocarbons has been devised. First, feed gas is condensed to provide...
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6237365 |
Apparatus for and method of separating a hydrocarbon gas into two fractions and a method of retrofitting an existing cryogenic apparatus
Disclosed is an improved cryogenic demethanizer, for separating an inlet hydrocarbon gas having a mixture of hydrocarbon components into a residual lighter gas fraction and a heavier liquid...
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6182469 |
Hydrocarbon gas processing
A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. In recent years, the preferred method of separating...
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6182468 |
Thermodynamic separation of heavier components from natural gas
A process for separation of particularly propane, methane or ethane from natural gas includes providing a distillation tower arrangement for separating the heavier components discharged at the...
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6109061 |
Ethane rejection utilizing stripping gas in cryogenic recovery processes
A process is shown for separating a relatively hot feed gas containing methane, ethane and heavier hydrocarbon constituents into a volatile residue gas and a primarily liquid bottoms. The feed gas...
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6105391 |
Process for liquefying a gas, notably a natural gas or air, comprising a medium pressure drain and application
The invention is a process for liquefying a compound A from a mixture comprising at least compound A and at least one compound B. The mixture is available at a pressure P1 with separation of the at...
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6098425 |
Thermodynamic separation
A process for separation of gases into two components of different boiling points, for example in the separation of ethane from natural gas, comprises a first separation tower V1 and a second...
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6014869 |
Reducing the amount of components having low boiling points in liquefied natural gas
Method of reducing the amount of components having low boiling points in liquefied natural gas comprising passing the liquefied natural gas at liquefaction pressure through the hot side of an...
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5992175 |
Enhanced NGL recovery processes
The present invention is directed to methods for improving the efficiency and economy of processes for the recovery of natural gas liquids (NGL) from a gas feed, e.g., raw natural gas or a refinery...
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5983664 |
Hydrocarbon gas processing
A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. In recent years, the preferred method of separating...
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5953935 |
Ethane recovery process
An improved ethane recovery system and process which increases the recovery of ethane up to about 99% with no increase in plant residue compression horsepower. The improved ethane recovery process...
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5890378 |
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 divided into first and second...
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5890377 |
Hydrocarbon gas separation process
A process for separating the components of a feed gas containing methane and heavier hydrocarbons is shown in which a recycle stream is used to satisfy the heat requirements of the process while at...
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5755114 |
Use of a turboexpander cycle in liquefied natural gas process
A process is shown for producing liquefied natural gas from a pressurized natural feed stream. The feed stream is introduced into heat exchange contact with a mechanical refrigeration cycle to cool...
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5566554 |
Hydrocarbon gas separation process
A process for the recovery of components of a feed gas containing methane and heavier components utilizing a demethanizer wherein at least two separation stages are provided, in which at least a...
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5421165 |
Process for denitrogenation of a feedstock of a liquefied mixture of hydrocarbons consisting chiefly of methane and containing at least 2 mol % of nitrogen
The invention is a process for the denitrogization of a liquefied natural gas (LNG) comprising methane and at least 2 Mols. of nitrogen. The process is distinguished in that the LNG is introduced...
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5351491 |
Process for obtaining high-purity hydrogen and high-purity carbon monoxide
An improvement in a process for the production of high-purity hydrogen and high-purity carbon monoxide by the separation of an extensively dry and CO 2 -free H 2 /CO crude gas mixture, also...
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5275005 |
Gas processing
A process for the recovery of C 2 components (ethylene and/or ethane) and heavier hydrocarbon components from a gas stream containing a significant quantity of components more volatile than...
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5233837 |
Process and apparatus for producing liquid carbon dioxide
A process for producing liquid carbon dioxide. A process stream which comprises carbon dioxide, balance substantially nitrogen and water, is cooled so that a minor amount of the water is condensed...
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4895584 |
Process for C.sub.2 recovery
An improved process for separating a hydrocarbon bearing feed gas containing methane and lighter, C 2 (ethylene and ethane) and heavier components into a fraction containing predominantly methane...
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4851020 |
Ethane recovery system
A method of recycling a portion of the overhead vapor stream to enhance ethane recovery from a demethanizer. After the overhead vapor stream is discharged from the demethanizer, a portion of it,...
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4732598 |
Dephlegmator process for nitrogen rejection from natural gas
A process is disclosed for the rejection of nitrogen from natural gas with the optional recovery of natural gas liquids. The process of the present invention employs a dephlegmator which provides a...
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4718927 |
Process for the separation of C.sub.2+ hydrocarbons from natural gas
A process for the separation of C 2 + hydrocarbons from natural gas under pressure wherein the natural gas is cooled (2, 6), partially condensed, and separated (9) into a liquid fraction and a...
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4705549 |
Separation of C.sub.3+ hydrocarbons by absorption and rectification
The separation of C 3 + hydrocarbons from natural gas and the like comprises subjecting the gas under pressure to partial condensation under cooling, separating the uncondensed gaseous phase and...
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4698081 |
Process for separating hydrocarbon gas constituents utilizing a fractionator
A process for separating the gas components contained in liquified natural gas wherein a small amount of heavier reflux liquid (propane, butane, pentane, iso-butane and iso-pentane) is recycled to...
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4690702 |
Method and apparatus for cryogenic fractionation of a gaseous feed
The invention relates to a method and an apparatus for cryogenic fractionation of a gaseous feed comprising a contact purifying-refrigerating column into the bottom of which is injected a partially...
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4657571 |
Process for the recovery of heavy constituents from hydrocarbon gaseous mixtures
A process is disclosed for the recovery of heavy constituents from high-pressure hydrocarbon gaseous mixtures comprising the steps of first cooling and partially condensing the gaseous mixture. The...
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4617039 |
Separating hydrocarbon gases
The present invention relates to a process for separating a hydrocarbon gas into a fraction containing a predominant portion of the ethane and lighter components and a fraction containing a...
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4600421 |
Two-stage rectification for the separation of hydrocarbons
To separate C 2 + or C 3 + hydrocarbons from hydrocarbon-containing gaseous mixtures by fractional condensation and rectification, the rectification is conducted in two columns, the second column...
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4596588 |
Selected methods of reflux-hydrocarbon gas separation process
A process for the separation of components of a normally vapor stream containing methane and heavier components by a cryogenic process. This process consisting of cooling the inlet stream,...
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4592766 |
Parallel stream heat exchange for separation of ethane and higher hydrocarbons from a natural or refinery gas
For the separation of ethane and higher hydrocarbons from a high pressure incoming gas containing hydrocarbons, the raw gas is cooled and expanded in several stages and the condensates that are...
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4548629 |
Process for the liquefaction of natural gas
The present invention is a process for the liquefaction of high pressure natural gas. The natural gas is expanded through a turboexpander to reduce its pressure and thereby cool it. The natural gas...
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