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7631516 |
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...
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7458232 |
Method and installation for producing treated natural gas, a C3+ hydrocarbon cut and an ethane rich stream
This method comprises the cooling of the initial natural gas and its introduction into a column for recovering C2+ hydrocarbons. It comprises the recovery of the top stream from the column to form...
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7404301 |
LNG facility providing enhanced liquid recovery and product flexibility
A single LNG facility, and operating method therefor, capable of efficiently producing LNG products that meet the varying specifications of different LNG markets.
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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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7316127 |
Hydrocarbon gas processing for rich gas streams
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...
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7213413 |
Noninvasive measurement and control system for use in hydrocarbon processing
Raman spectrometers are employed in a hydrocarbon processing plant for online measurement of at least one compositional property of a hydrocarbon stream. The Raman spectrometers can be used to...
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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...
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7100399 |
Enhanced operation of LNG facility equipped with refluxed heavies removal column
Improved methodology for starting up a LNG facility employing a refluxed heavies removal column. The improved methodology involves varying the temperature of the feed to the heavies removal column...
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6578379 |
Process and installation for separation of a gas mixture containing methane by distillation
A process and apparatus for separation of a gas mixture. A process and an installation for cryogenic separation of the constituents of a natural gas under pressure in a first phase separator in...
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5724833 |
Control scheme for cryogenic condensation
In a cryogenic condensation scheme used for benzene removal in a process for liquefying natural gas, two series connected separation columns are provided with a feedstream precooled in a heat...
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5430223 |
Process for separating higher hydrocarbons from a gas mixture
A process for separating higher hydrocarbons from a gas mixture containing the latter and lower-boiling components by rectificatory decomposition is described. The feed gas mixture (6) is partially...
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5375422 |
High efficiency nitrogen rejection unit
A process for separating nitrogen and hydrocarbons from a mixture of gases by splitting the mixture into a plurality of separate streams and throttling the flow of each stream to achieve a selected...
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5141544 |
Nitrogen rejection unit
A process for separating nitrogen and hydrocarbons from a mixture of gases by splitting the mixture into a plurality of separate streams and throttling the flow of each stream to achieve a selected...
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4936888 |
Nitrogen rejection unit
An improved apparatus and process are disclosed for nitrogen rejection from a gaseous hydrocarbon stream recovered from an enhanced oil recovery project employing nitrogen for miscible flood of oil...
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4809154 |
Automated control system for a multicomponent refrigeration system
An automated control system for the control of mixed refrigerant-type liquified natural gas production facilities comprising optimization of functional parameters, concurrent monitoring and...
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4769056 |
Distillation pressure control
In a fractional distillation column wherein a split-range controller alternately manipulates a valve for flaring gas to decrease pressure and a valve for importing gas to increase pressure as...
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4753666 |
Distillative processing of CO2 and hydrocarbons for enhanced oil recovery
A method of treating CO2 rich gas for injection into a petroleum reservoir is described. CO2 rich gas containing methane, nitrogen, ethane, propane, butanes, and heavier components is distilled...
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4746407 |
Fractionator reflux pump method and apparatus
In a fractional distillation process, the operation of a reflux pump in the process is enhanced by providing that liquid discharged from the reflux pump is returned directly to the reflux pump...
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4584006 |
Process for recovering propane and heavier hydrocarbons from a natural gas stream
A process for economically recovering propane and heavier hydrocarbon components from ethane, methane and lighter constituents of natural gas streams is disclosed. The separation process of the...
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4563204 |
Method and apparatus for withdrawing a bottom product from a low-temperature rectifying column
A quantity of tritium of less than 1 mol per hour is continuously withdrawn from the vaporization chamber of a low-temperature rectifying column by means of a withdrawal system.The withdrawal...
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4544452 |
Control of a fractional distillation process
In a fractional distillation process in which it is desired to maintain a desired overhead product composition and bottoms product composition, a set point for the flow rate of the external reflux...
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4540422 |
Control of the concentration of methylacetylene and propadiene in a propylene/propane fractionation column
The concentration buildup of contaminants methylacetylene and propadiene in a propylene/propane fractionation column is prevented by controlling the injection of propane from a source external from...
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4529484 |
Fractional distillation column control
A desired cloud point temperature for a side draw product stream from a fractional distillation column is maintained at a desired level by comparing a calculated actual cloud point temperature,...
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4529485 |
Constraint control of a fractional distillation process
A fractional distillation process, in which the flow rate of the external reflux is utilized to control the bottoms product composition, is controlled so as to maintain a desired bottoms product...
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4498916 |
Control of a fractional distillation process
In a fractional distillation process in which both a heating fluid and a waste heat stream are utilized to supply heat to the fractional distillation process, the heat input to the fractional...
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4464189 |
Fractional distillation of C2 /C3 Hydrocarbons at optimum pressures
A method of recovering by distillation the separate components of a hydrocarbon gas mixture comprising ethylene, ethane, propylene and propane which comprises separating the ethylene and ethane as...
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4371426 |
Control of a fractional distillation process
In a fractional distillation column in which at least a first component and a second component are at least partially separated with the first component being removed principally as an overhead...
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4367121 |
Fractional distillation column control
In a fractional distillation column, a desired ratio between the flow rate of a side draw product stream and the internal reflux flow rate at the particular tray from which a side draw stream is...
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4302229 |
Control of a fractional distillation column
A control system for a fractional distillation column, where the feed to the fractional distillation column is supplied from at least one separator, is disclosed in which overloading of the...
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4298363 |
Fractionator feed tank pressure control
In a fractionation process in which at least two fractional distillation columns are cascaded in series, the vapor from the overhead accumulator associated with the first fractional distillation...
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4230534 |
Control of a fractional distillation column
A control system is provided for a fractional distillation column where at least a portion of the overhead vapor stream from the fractional distillation column is utilized in a refrigeration and...
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4070172 |
Pressure responsive fractionation control
In a fractionation system in which pressure fluctuations within the fractionation vessel can result in alteration of the fractionator product composition, fractionation column pressure is monitored...
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3939045 |
Distillation method and apparatus
A method and apparatus for the separation of a normally liquid stream comprising low, high and intermediate volatility components by distilling the feed stream in a distillation zone, removing a...
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3926742 |
Controlled fractionation method and apparatus
This invention resides in a fractionation system having a hydrocarbon feed stream and an absorption medium stream from a suitable source thereof controllably passed into an absorber, an overhead...
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3874184 |
REMOVING NITROGEN FROM AND SUBSEQUENTLY LIQUEFYING NATURAL GAS STREAM
A natural gas containing substantial nitrogen is refrigerated to below minus 120°F in usual propane-ethylene refrigeration system using a cascade arrangement. Vapor and liquid thus obtained are ...
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3793157 |
METHOD FOR SEPARATING A MULTICOMPONENT FEEDSTREAM
A method for separating a multicomponent hydrocarbon feedstream in a column into an overhead vapor stream and a liquid bottoms-product stream having a specified purity by maintaining the overhead...
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3676304 |
CONTROL OF FRACTIONATION COLUMN REBOILER
The flow of heat exchange fluid through the reboiler of a fractionation column is controlled in response to a computation of the heat actually supplied by the fluid. The set point of the flow...
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3619377 |
CONTROL OF COMPOSITION OF OVERHEAD VAPOROUS PRODUCT IN A PARTIALLY CONDENSING FRACTIONATION COLUMN
A multicomponent feed is fractionated in a distillation column to produce an overhead vapor stream, which is then partially condensed and passed to an accumulator to obtain a liquid external reflux...
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3607665 |
FRACTIONATOR PRESSURE CONTROL SYSTEM
A method and apparatus for controlling the pressure within a fractionation column by regulating the rate of condensing, the liquid level height within the condenser and gas flow.
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3512368 |
HELIUM AND NITROGEN CONTAINING FUEL PRODUCT RECOVERY
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3509729 |
HYDRATE DETECTION AND CONTROL IN FRACTIONATION COLUMNS
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3507127 |
PURIFICATION OF NITROGEN WHICH CONTAINS METHANE
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3504735 |
CONTROL OF LIQUID LEVEL OF REFRIGERANTS IN SERIALLY CONNECTED INDIRECT HEAT EXCHANGERS
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3493470 |
VOLATILE COMPONENTS BY VAPORIZATION WHILE MAINTAINING THE DESIRED RATE OF VAPORIZATION BY OVERHEAD FLOW CONTROL
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3489678 |
PRECLUDING LIQUID FROM A COMPRESSING ZONE
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3600282 |
CONTROL OF TWO REFLUX STREAMS IN A FRACTIONAL SEPARATION SYSTEM
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3471374 |
INTRODUCING THE FEED TO A DISTILLATION ZONE MIXED WITH THE REFLUX
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3470069 |
TEMPERATURE CONTROL OF A PROCESSING ZONE BY SENSING AND AVERAGING SEPARATE TEMPERATURES
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3444052 |
FLASH VAPORIZATION WITH VAPOR FLOW STREAMS CONTROLLED BY LIQUID LEVEL
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3434934 |
CONTROL SYSTEM FOR FRACTIONAL DISTILLATION COLUMNS
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