DE1551607B1 - Process for the low-temperature rectification of a gas mixture - Google Patents

Process for the low-temperature rectification of a gas mixture

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Publication number
DE1551607B1
DE1551607B1 DE1967M0076229 DEM0076229A DE1551607B1 DE 1551607 B1 DE1551607 B1 DE 1551607B1 DE 1967M0076229 DE1967M0076229 DE 1967M0076229 DE M0076229 A DEM0076229 A DE M0076229A DE 1551607 B1 DE1551607 B1 DE 1551607B1
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Germany
Prior art keywords
column
rectification
partial
flow
relaxed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE1967M0076229
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German (de)
Inventor
Kaiser Dipl-Ing Otto
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Messer Griesheim GmbH
Original Assignee
Messer Griesheim GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of DE1551607B1 publication Critical patent/DE1551607B1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
    • F25J3/0209—Natural gas or substitute natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0233—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 1 carbon atom or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0257—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/02—Processes or apparatus using separation by rectification in a single pressure main column system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/50—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/06—Splitting of the feed stream, e.g. for treating or cooling in different ways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/02—Internal refrigeration with liquid vaporising loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Claims (2)

1 21 2 Verfahren zur Tieftemperatur-Rektifikation eines Durch die erfindungsgemäße Herstellung eines käl-Process for the low-temperature rectification of a By the inventive production of a cold Gasgemisches, bei dem das zu zerlegende Gas- teren und eines wärmeren Speisestromes wird ohne gemisch in zwei Teilströme verschiedenen spezifischen zusätzliche Exergiezufuhr erreicht, daß sich die Rek-Hüssigkeitsgehaltes aufgeteilt und der Teilstrom mit tifikationslinien in zwei Punkten unterhalb der Gleichdem höheren Flüssigkeitsgehalt einige Böden ober- 5 gewichtskurve schneiden, die Rektifikation somit halb der Einspeisestelle des Teilstromes mit dem möglich ist. In F i g. 2 ist ζ die Zusammensetzung des niedrigeren Flüssigkeitsgehalt in eine Rektifikations- zu zerlegenden Gasgemisches und FID das Verhältkolonne entspannt wird. nis Flüssigkeitsmenge zu Dampfmenge eines Teil-Bekanntlich läßt sich die Rektifikation leichter stromes. Die beiden aus dem zu zerlegenden Gasdurchführen, wenn man das zerlegende Gasgemisch io gemisch hergestellten Naßdampfströme haben beim vor Eintritt in die Kolonne in zwei Teilströme mit Eintritt in die Kolonne zwar die gleiche Zusammenverschiedenem Flüssigkeitsgehalt aufteilt. Dies wird Setzung und zusammen auch die gleiche Energie erreicht, indem der eine Teilstrom durch eine (Enthalpie) wie der unauf geteilte Gasstrom, sie haben Wärmequelle erwärmt und der andere durch eine aber eine größere Exergie als ein ohne Aufteilung Kältequelle abgekühlt wird. Der erste Teilstrom be- 15 entspannter Speisestrom. Entsprechend ihrem untersteht dann aus flüssigkeitsarmem Naßdampf, der schiedlichen Verhältnis von Flüssigkeitsmenge zu zweite aus flüssigkeitsreichem Naßdampf. Der zweite Dampfmenge haben sie unterschiedliche Temperatu-Teilstrom wird einige Böden oberhalb des ersten in ren. Die nicht umkehrbare Drosselung des zu zerdie Rektifikationskolonne geleitet. legenden Gasgemisches auf Kolonnendruck wird Bei diesem Verfahren wird mit der erwähnten 20 durch die Aufteilung reversibler durchgeführt, so daß Wärme- und Kältequelle dem zu zerlegenden Gas- weniger Arbeitsfähigkeit bei der Drucksenkung vergemisch Exergie zugeführt. Die Erfindung hat die lorengeht und so mehr Exergie für die Rektifikation Aufgabe, ein Rektifikationsverfahren mit Speise- zur Verfügung steht.Gas mixture in which the gas to be broken down and a warmer feed stream is achieved without a mixture in two partial streams of different specific additional exergy supply, so that the rec-liquid content is divided and the partial stream is divided into two points below the level of the higher liquid content a few floors above. 5 cut weight curve, the rectification half of the feed point of the partial flow with which is possible. In Fig. 2 is ζ the composition of the lower liquid content in a rectification gas mixture to be separated and FID the ratio column is expanded. nis amount of liquid to amount of vapor of a part-It is well known that rectification is easier to stream. The two wet steam streams produced from the gas to be broken down, when the gas mixture to be broken down is mixed, have the same liquid content, which is different together before entry into the column, into two substreams with entry into the column. This is achieved by settling and together also the same energy, in that one partial flow is heated by a (enthalpy) like the undivided gas flow, they have a heat source and the other is cooled by a greater exergy than a cold source without a split. The first partial flow is a relaxed feed flow. According to their subordinate to then from low-liquid wet steam, the different ratio of the amount of liquid to the second from liquid-rich wet steam. The second amount of steam they have different temperatu-partial flow is some trays above the first in ren. The irreversible throttling of the rectification column passed to the rectification column. In this process, the above-mentioned 20 is carried out more reversibly due to the division, so that the heat and cold source are mixed with exergy when the pressure is reduced, so that the heat and cold source are mixed with the gas to be separated. The invention has the problem and so more exergy for the rectification, a rectification process with food is available. Stromaufteilung durchzuführen, ohne daß dem Speise- Fig. 3 zeigt das erfindungsgemäße Verfahren mitCarry out current division without the feed Fig. 3 shows the method according to the invention strom Exergie zugeführt werden muß, wobei unter 25 einer Aufteilung des Speisestromes in drei Teilströme. Exergie der Teil der Energie verstanden wird, der Es wurden die gleichen Bezugszeichen verwendet wie sich in Arbeit verwandeln läßt (technische Arbeits- in Fig. 1, soweit es sich um gleiche Anlagenteile fähigkeit). handelt. Das Gasgemisch 12 wird zunächst in zweiflow exergy must be supplied, with a division of the feed flow into three sub-flows under 25. Exergy that part of the energy is understood that the same reference numerals have been used as can be transformed into work (technical work in Fig. 1, as far as the same system parts capability). acts. The gas mixture 12 is initially in two Dies wird dadurch erreicht, daß der eine Teilstrom Teilströme aufgeteilt. Der erste wird im Drosselnach seiner Entspannung Kälte an den anderen Teil- 30 ventil 1 auf Kolonnendruck entspannt, im Wärmestrom abgibt und dann in die Kolonne geleitet wird, austauscher 2 angewärmt und über Leitung 3 in die während der andere, nunmehr abgekühlte Teilstrom Rektifizierkolonne 4 geleitet. Der zweite wird im ebenfalls entspannt wird und einige Böden oberhalb Wärmeaustauscher 2 abgekühlt und dann erneut in des ersten Teilstromes in die Kolonne strömt. zwei Teilströme aufgeteilt. Von diesen wird der eineThis is achieved in that one partial flow divides partial flows. The first will be in Drosselnach its relaxation cold on the other part valve 1 relaxed to column pressure, in the heat flow releases and is then passed into the column, heated exchanger 2 and via line 3 in the while the other, now cooled, substream is passed to rectification column 4. The second is in the is also relaxed and cooled some floors above heat exchanger 2 and then again in of the first substream flows into the column. split two streams. Of these, the one will be Eine geringfügige Verbesserung dieses Verfahrens 35 im Drosselventil? auf Kolonnendruck entspannt, woläßt sich dadurch erreichen, daß der zweite ab- bei er sich abkühlt, im Wärmeaustauscher 8 wieder gekühlte Teilstrom vor dem Entspannen ebenfalls etwas erwärmt und über Leitung 9 einige Böden in zwei Teilströme aufgeteilt wird, von denen der oberhalb der Zuflußstelle des ersten Teilstromes in eine wiederum nach Entspannung Kälte an den an- die Rektifizierkolonne 4 geleitet. Der andere wird im deren abgibt und in die Kolonne geht, und der an- 40 Wärmeaustauscher 8 abgekühlt, im Drosselventil 10 dere danach ebenfalls entspannt und einige Böden auf Kolonnendruck entspannt und über Leitung 11 in weiter oben in die Kolonne geführt wird. die Rektifizierkolonne 4 geleitet. Dies ist der kältesteA slight improvement to this method 35 in the throttle valve? relaxed at column pressure, wolasst can be achieved by the fact that the second cools down again in the heat exchanger 8 cooled partial stream also warmed up somewhat before the expansion and some floors via line 9 is divided into two substreams, of which the one above the inflow point of the first substream in one in turn, after relaxation, passed cold to the other rectifying column 4. The other will be in which emits and goes into the column, and the adjacent heat exchanger 8 is cooled in the throttle valve 10 which then also relaxed and some trays relaxed to column pressure and via line 11 in is passed further up in the column. the rectification column 4 passed. This is the coldest Die Erfindung wird nun an Hand eines Beispiels, Teilstrom mit dem höchsten Flüssigkeitsgehalt. Er der Zerlegung eines Zweistoffgemisches, näher erläu- wird deshalb einige Böden höher als die beiden antert. Die Erfindung ist selbstverständlich nicht auf 45 deren Teilströme in die Rektifizierkolonne 4 geführt. Zweistoffgemische beschränkt. In der Zeichnung zeigt Als praktisches Beispiel für die Anwendung desThe invention is now based on an example, partial flow with the highest liquid content. He the decomposition of a two-component mixture, which is why a few floors higher than the two are explained in more detail. The invention is of course not directed to the rectification column 4 on the substreams thereof. Limited two-component mixtures. The drawing shows As a practical example of the application of the Fi g. 1 das Verfahrensschema einer Aufteilung in erfindungsgemäßen Verfahrens sei die Zerlegung zwei Teilströme, eines Gemisches aus 50 Molprozent N2 und 50 MoI-Fi g. 1 the process scheme of a division in the process according to the invention is the separation of two substreams, a mixture of 50 mol percent N 2 and 50 mol Fig. 2 das zugehörige McCabe-Thiele-Diagramm prozent CH4 genannt (Stickstoffentfernung aus Erd- und 50 gas). Der kostensparende Doppelsäulenprozeß, wie erFig. 2 the associated McCabe-Thiele diagram called percent CH 4 (nitrogen removal from natural and 50 gas). The cost-saving twin pillar process, like him Fig. 3 das Verfahrensschema einer Aufteilung in für die Luftzerlegung bekannt ist, läßt sich trotz des drei Teilströme. hohen CH4-Gehaltes durchführen, indem der für dieFig. 3 is the process scheme of a division in known for the air separation, can be despite the three partial flows. high CH 4 content by using the Nach F i g. 1 wird das zu zerlegende Gasgemisch Niederdrucksäule vorgesehene Speisestrom aufgeteilt 12 in zwei Teilströme aufgeteilt. Der erste gelangt wird. Der Speisestrom für die Niederdrucksäule ist nach Entspannung im Drosselventil I und Anwär- 55 das flüssige Rohmethaö aus dem Sumpf der Mittelmung im Wärmeaustauscher 2 als flüssigkeitsarmer drucksäule. Ohne diese Aufteilung könnte das Naßdampf 3 in die Rektifizierkolonne 4. Der zweite N2/CH4-Gemisch nur unter Mitwirkung eines Kreis-Teilstrom wird zunächst im Wärmeaustauscher 2 ab- laufes in reines Methan und reinen Stickstoff zerlegt gekühlt, dann im Drosselventil 5 entspannt und ge- werden.According to FIG. 1, the gas mixture to be broken down is divided into the feed stream provided for the low-pressure column, 12 divided into two substreams. The first arrives. The feed flow for the low-pressure column is after expansion in the throttle valve I and an increase in the liquid raw methaö from the sump of the averaging in the heat exchanger 2 as a low-liquid pressure column. Without this division, the wet steam 3 could enter the rectification column 4. The second N 2 / CH 4 mixture, only with the assistance of a circuit substream, is first cooled in the heat exchanger 2, broken down into pure methane and pure nitrogen, then released in the throttle valve 5 and become. langt als flüssigkeitsreicher Naßdampf 6 einige Böden 60 τ»,,+=«+™««·™,··,.!,»,as liquid-rich wet steam 6 reaches some bottoms 60 τ »,, + =« + ™ «« · ™, ··,.!, », ι. t. it. j % α ο j. 11 j j. m ·, f" ■ .Patentansprüche:ι. t. it. j % α ο j. 11 j j. m ·, f "■. Patent claims: oberhalb der Zuflußstelle des ersten Teilstromes in r above the inflow point of the first substream in r die Rektifizierkolonne 4. 1. Verfahren zur Tieftemperatur-Rektifikationthe rectification column 4. 1. Process for low-temperature rectification Im zugehörigen McCabe-Thiele-Diagramm nach eines Gasgemisches, bei dem das zu zerlegendeIn the associated McCabe-Thiele diagram for a gas mixture in which the Fig. 2 erkennt man, daß eine Rektifikation ohne Gasgemisch in zwei Teilströme verschiedenen Speisestromaufteilung oder zusätzliche Kolonnen- 65 spezifischen Flüssigkeitsgehaltes aufgeteilt undFig. 2 shows that a rectification without a gas mixture in two different substreams Feed stream distribution or additional column 65 specific liquid content and divided kopfkühlung und Kolonnenfußheizung nicht möglich der Teilstrom mit dem höheren Flüssigkeitsgehalthead cooling and column foot heating not possible the partial flow with the higher liquid content ist, da sich die zwei äußeren Rektifikationslinien jen- einige Böden oberhalb der Einspeisestelle desis because the two outer rectification lines are located a few floors above the feed point of the seits der Gleichgewichtskurve im Punktet schneiden. Teilstromes mit dem niedrigeren Flüssigkeits-cut on the side of the equilibrium curve at the point. Partial flow with the lower liquid gehalt in eine Rektifizierkolonne entspannt wird, dadurch gekennzeichnet, daß der eine Teilstrom nach seiner Entspannung Kälte an den anderen Teilstrom abgibt und dann in die Kolonne geleitet wird, während der andere, nunmehr abgekühlte Teilstrom ebenfalls entspannt wird und einige Böden oberhalb des ersten Teilstromes in die Kolonne strömt.content is relaxed in a rectifying column, characterized in that the one Partial flow releases cold to the other partial flow after its relaxation and then into the Column is passed, while the other, now cooled substream is also expanded and some trays above the first substream flows into the column. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der zweite abgekühlte Teilstrom vor dem Entspannen ebenfalls in zwei Teilströme aufgeteilt wird, von denen der eine wiederum nach Entspannung Kälte an den anderen abgibt und in die Kolonne geht und der andere danach ebenfalls entspannt und einige Boden weiter oben in die Kolonne geführt wird.2. The method according to claim 1, characterized in that the second cooled partial flow is also divided into two substreams prior to expansion, one of which again after relaxation gives off cold to the other and goes into the column and the other then also relaxed and a few trays is passed further up in the column. Hierzu 1 Blatt Zeichnungen1 sheet of drawings COPYCOPY
DE1967M0076229 1967-11-15 1967-11-15 Process for the low-temperature rectification of a gas mixture Pending DE1551607B1 (en)

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US4278457A (en) * 1977-07-14 1981-07-14 Ortloff Corporation Hydrocarbon gas processing
US4869740A (en) * 1988-05-17 1989-09-26 Elcor Corporation Hydrocarbon gas processing
US4854955A (en) * 1988-05-17 1989-08-08 Elcor Corporation Hydrocarbon gas processing
US4889545A (en) * 1988-11-21 1989-12-26 Elcor Corporation Hydrocarbon gas processing
US6237365B1 (en) 1998-01-20 2001-05-29 Transcanada Energy Ltd. Apparatus for and method of separating a hydrocarbon gas into two fractions and a method of retrofitting an existing cryogenic apparatus
US20090282865A1 (en) 2008-05-16 2009-11-19 Ortloff Engineers, Ltd. Liquefied Natural Gas and Hydrocarbon Gas Processing
US20100287982A1 (en) 2009-05-15 2010-11-18 Ortloff Engineers, Ltd. Liquefied Natural Gas and Hydrocarbon Gas Processing
US9021832B2 (en) * 2010-01-14 2015-05-05 Ortloff Engineers, Ltd. Hydrocarbon gas processing
CN106029848A (en) * 2013-10-09 2016-10-12 鲁姆斯科技公司 Split feed addition to iso-pressure open refrigeration LPG recovery
US10533794B2 (en) 2016-08-26 2020-01-14 Ortloff Engineers, Ltd. Hydrocarbon gas processing
US10551119B2 (en) 2016-08-26 2020-02-04 Ortloff Engineers, Ltd. Hydrocarbon gas processing
US10551118B2 (en) 2016-08-26 2020-02-04 Ortloff Engineers, Ltd. Hydrocarbon gas processing
US11402155B2 (en) 2016-09-06 2022-08-02 Lummus Technology Inc. Pretreatment of natural gas prior to liquefaction
US11543180B2 (en) 2017-06-01 2023-01-03 Uop Llc Hydrocarbon gas processing
US11428465B2 (en) 2017-06-01 2022-08-30 Uop Llc Hydrocarbon gas processing

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US1968518A (en) * 1932-09-10 1934-07-31 Linde Air Prod Co Method and apparatus for liquefying and separating gaseous mixtures
US2327459A (en) * 1942-06-05 1943-08-24 Linde Air Prod Co Process of and apparatus for separating gas mixtures
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