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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...
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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...
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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...
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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...
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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...
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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...
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6266977 |
Nitrogen refrigerated process for the recovery of C2+ Hydrocarbons
C 2 and C 3 hydrocarbons, particularly ethylene and propylene, are recovered from refinery or petrochemical plant gas mixtures by cooling and fractionating a feed gas mixture containing these...
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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...
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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...
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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...
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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.
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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5287703 |
Process for the recovery of C.sub.2 + or C.sub.3 + 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...
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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...
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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 C 3 + hydrocarbons from a high pressure natural gas or refinery/petrochemical feed gas containing C 3 + ...
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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...
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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...
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4714487 |
Process for recovery and purification of C.sub.3 -C.sub.4+ 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 C 3 + and/or C 4 + hydrocarbons. The...
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4707170 |
Staged multicomponent refrigerant cycle for a process for recovery of C.sub.+ 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...
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4689063 |
Process of fractionating gas feeds and apparatus for carrying out the said process
The present invention relates to a process and an apparatus for cryogenic fractionation of gas feeds, the apparatus comprising essentially a contact purifying-refrigerating column associated with a...
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4525187 |
Dual dephlegmator process to separate and purify syngas mixtures
The present invention involves a process for separating and purifying gas mixtures comprising H 2 , CO and C 1 + hydrocarbons. The gas is initially cooled in a high pressure dephlegmator to...
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4519825 |
Process for recovering C.sub.4 + hydrocarbons using a dephlegmator
A process is described for separating C 4 + hydrocarbons in high recovery and high purity from a feed gas comprising about 0-5% C 5 and heavier hydrocarbons, 1-10% C 4 hydrocarbons, 0-10% C 3 ...
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4270940 |
Recovery of C.sub.2 hydrocarbons from demethanizer overhead
Enhanced recovery of ethane and ethylene from demethanizer overhead is obtained by subjecting the uncondensed vapor effluent from the main reflux condenser to further condensation and accompanying...
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4270939 |
Separation of hydrogen containing gas mixtures
Enhanced recovery of the methane content of a multicomponent stream containing lower boiling gas components is obtained by effecting condensation of at least the major portion of the methane...
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4002042 |
Recovery of C.sub.2 + hydrocarbons by plural stage rectification and first stage dephlegmation
A process is provided for the separation and recovery of a major portion of the C 2 + hydrocarbon content of a feed gas comprising hydrogen, methane, ethylene, and ethane. The feed gas is...
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