DE2702423A1 - PROCESS FOR SEPARATING THE AETHYLENE CONTAINED IN A C DEEP 2 FRACTION FROM THE AETHANE - Google Patents

PROCESS FOR SEPARATING THE AETHYLENE CONTAINED IN A C DEEP 2 FRACTION FROM THE AETHANE

Info

Publication number
DE2702423A1
DE2702423A1 DE19772702423 DE2702423A DE2702423A1 DE 2702423 A1 DE2702423 A1 DE 2702423A1 DE 19772702423 DE19772702423 DE 19772702423 DE 2702423 A DE2702423 A DE 2702423A DE 2702423 A1 DE2702423 A1 DE 2702423A1
Authority
DE
Germany
Prior art keywords
fraction
ethane
ethylene
separating
contained
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.)
Withdrawn
Application number
DE19772702423
Other languages
German (de)
Other versions
DE2702423B2 (en
Inventor
Luigi Gazzi
Oronzo Sguera
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SnamProgetti SpA
Original Assignee
SnamProgetti SpA
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 SnamProgetti SpA filed Critical SnamProgetti SpA
Publication of DE2702423A1 publication Critical patent/DE2702423A1/en
Publication of DE2702423B2 publication Critical patent/DE2702423B2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F25J3/0238—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 2 carbon atoms or more
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/04—Purification; Separation; Use of additives by distillation
    • 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
    • F25J3/0219—Refinery gas, cracking gas, coke oven gas, gaseous mixtures containing aliphatic unsaturated CnHm or gaseous mixtures of undefined nature
    • 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
    • F25J2210/12—Refinery or petrochemical off-gas

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

betreffendconcerning

Verfahren zum Trennen des in einer Co-Fraktion enthaltenenMethod for separating that contained in a co-fraction Äthylens vom ÄthanEthylene from ethane

Die Erfindung bezieht sich auf ein Verfahren zum Abtrennen des Äthylens vom Äthan, ausgehend von einer C2-Praktion (C2-Schnitt).The invention relates to a method for separating the ethylene from the ethane, starting from a C 2 fraction (C 2 cut ).

Es ist bekannt daß das in C2-]?raktionen enthaltene Äthylen vom Äthan getrennt wird durch Destillation der C2-Fraktion, die außer Äthylen und Äthan noch andere Bestandteile, darunter Methan, Acetylen und propylen in Anteilen enthält, welche die in dem Endprodukt noch geduldete Maximalmenge nicht überschreiten.It is known that the ethylene contained in C 2 -]? Fractions is separated from the ethane by distillation of the C 2 fraction, which, in addition to ethylene and ethane, also contains other components, including methane, acetylene and propylene, in proportions which are those in the end product Do not exceed the maximum amount still tolerated.

Der C2-Schnitt wird einer Destillationskolonne zugeführt, wo er in seine Bestandteile aufgespalten wird. Da aber die Flüchtigkeit von Äthylen weitgehend derjenigen von Äthan entspricht, ist.das Fraktionieren außerordentlich aufwendig, sowohl was die Investitionen betrifft, als auch hinsichtlich der laufenden Kosten, denn man braucht eine große Anzahl an Böden um die Trennung durchzuführen, so daß die Destillations-The C 2 cut is fed to a distillation column, where it is split into its components. However, since the volatility of ethylene largely corresponds to that of ethane, fractionation is extremely costly, both in terms of investments and in terms of running costs, because a large number of trays are required to carry out the separation, so that the distillation

709830/ 1047709830/1047

kolonnea sehr hoch werden·kolonnea become very high

$3 wurde nun gefunden, daß man die Nachteile der bisher üblichen Destillationsverfährθη dadurch überwinden kann, daß man die C2-Fraktion bereits vor dem Einleiten in die Destillationskolonne in zwei Fraktionen aufspaltet, von denen die eine, in Prozent ausgedrückt, mehr Äthylen und die andere, ebenfalls in Prozent, mehr Äthan als das Ausgangsgemisch aufweist.It has now been found that the disadvantages of the previously customary distillation process can be overcome by splitting the C 2 fraction into two fractions before it is introduced into the distillation column, one of which, expressed as a percentage, has more ethylene and the other , also in percent, has more ethane than the starting mixture.

Das Aufspalten des Gemisches in zwei Fraktionen kann in einer oder mehreren aufeinanderfolgenden Fraktionierungsstufen vorgenommen werden, die mit dem Ziel durchgeführt werden, auch die anderen unerwünschten Verbindungen abzutrennen. DieThe splitting of the mixture into two fractions can be carried out in one or more successive fractionation stages which are carried out with the aim of also cutting off the other undesired connections. the

wirdwill

Charge/ nach Aufspalten in eine Fraktion, in der das Gewichtsverhältnis von Äthylen zu Äthan größer ist als in dem ursprünglichen Gemisch und eine Fraktion, in der umgekehrt das Gewichtsverhältnis von Äthan zu Äthylen größer ist als im ursprünglichen Gemisch, einer Destillationskolonne zugeführt, wobei man zweckmäßigerweise die Erstgenannte der beiden Fraktionen, in der das Gewichtsverhältnis von Äthylen zu Äthan größer ist als im ursprünglichen Gemisch, der Kolonne an einer Stelle zuführt, die oberhalb der Stelle liegt, an der die andere Fraktion zugeführt wird.Charge / after splitting into a fraction in which the weight ratio of ethylene to ethane is greater than in the original Mixture and a fraction in which, conversely, the weight ratio of ethane to ethylene is greater than in original mixture, fed to a distillation column, expediently the former of the two fractions, in which the weight ratio of ethylene to ethane is greater than in the original mixture, the column on one Feeds point that is above the point at which the other fraction is fed.

PatentansprücheClaims

709830/1047709830/1047

Claims (2)

PatentansprücheClaims Verfahren zum Trennen des in einer Cp-Fraktion entMethod for separating the ent in a Cp fraction haltenen Äthylens vom Äthan durch Destillation, dadurch gekennzeichnet , daß man der Destillationsstufe zwei mittels ein- oder mehrmaliger Fraktionierung des Cp-Schnitts erhaltene getrennte Fraktionen zuführt, nämlich eine erste Fraktion, in der das Gewichtsverhältnis von Äthylen zu Äthan größer ist als im Ausgangsgemisch und eine zweite Fraktion, in dem umgekehrt das Gewichtsverhältnis von Äthan zu Äthylen größer ist als im Ausgangsgemisch.holding ethylene from ethane by distillation, thereby characterized in that one of the distillation stage two by means of single or multiple fractionation of the Cp cut separate fractions obtained feeds, namely a first fraction in which the weight ratio of ethylene to ethane is greater than in the starting mixture and a second fraction in which the weight ratio of ethane to ethylene is reversed is greater than in the starting mixture. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man der Destillationskolonne die erste Fraktion an einer Stelle zuführt, die oberhalb der Stelle liegt, an der die zweite Fraktion zugeführt wird·2. The method according to claim 1, characterized in that the distillation column is the feeds the first fraction at a point which is above the point at which the second fraction is fed 86828682 709830/1047709830/1047 ORIGINAL INSPECTEDORIGINAL INSPECTED
DE19772702423 1976-01-21 1977-01-21 Process for obtaining the ethylene contained in a C2 fraction Withdrawn DE2702423B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1943976A IT1054284B (en) 1976-01-21 1976-01-21 PROCESS FOR THE SEPARATION OF ETHYLENE FROM ETHANE FROM A CUT 02

Publications (2)

Publication Number Publication Date
DE2702423A1 true DE2702423A1 (en) 1977-07-28
DE2702423B2 DE2702423B2 (en) 1979-09-20

Family

ID=11157976

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19772702423 Withdrawn DE2702423B2 (en) 1976-01-21 1977-01-21 Process for obtaining the ethylene contained in a C2 fraction

Country Status (7)

Country Link
CY (1) CY1047A (en)
DE (1) DE2702423B2 (en)
EG (1) EG14553A (en)
ES (1) ES455564A1 (en)
GB (1) GB1539292A (en)
GR (1) GR59767B (en)
IT (1) IT1054284B (en)

Also Published As

Publication number Publication date
EG14553A (en) 1984-09-30
GB1539292A (en) 1979-01-31
CY1047A (en) 1980-08-01
GR59767B (en) 1978-02-25
IT1054284B (en) 1981-11-10
ES455564A1 (en) 1978-01-16
DE2702423B2 (en) 1979-09-20

Similar Documents

Publication Publication Date Title
DE1493001C3 (en) Process for the production of 13-butadiene or isoprene from a hydrocarbon mixture containing essentially these and small amounts of acetylenes
DE1808758C3 (en) Process for the separation of pure aromatic hydrocarbons from hydrocarbon mixtures !!
DE2724365A1 (en) PROCESS FOR SEPARATING A C LOW 4 HYDROCARBON MIXTURE BY EXTRACTIVE DISTILLATION
DE821340C (en) Process for separating gas mixtures
EP0074506B1 (en) Process for the separation of acetone from carbonylation mixtures
DE2359300C3 (en) Process for the production of pure saturated hydrocarbons by extractive distillation
DE4201000A1 (en) METHOD FOR PARTIAL OR COMPLETE SEPARATION OF A MIXTURE OF 1,1,1,3,3-PENTAFLUORBUTANE ("I-365") AND 1,1-DICHLOR-1-FLUORETHANE ("I-141B")
DE2702423A1 (en) PROCESS FOR SEPARATING THE AETHYLENE CONTAINED IN A C DEEP 2 FRACTION FROM THE AETHANE
DE4201030A1 (en) METHOD FOR PARTIAL OR COMPLETE SEPARATION OF A MIXTURE OF 1,1,1,3,3-PENTAFLUORBUTANE ("I-365") AND 1,1-DICHLOR-1-FLUORETHANE ("I-141B")
EP0982280B1 (en) Process for the recovery of butadiene-1,2
DE2065782B2 (en) Process for the extraction of aromatic hydrocarbons from a hydrocarbon mixture in a multi-stage system
DE2702424A1 (en) PROCESS FOR SEPARATING AETHYLENE AND AETHANE
DE865303C (en) Process for separating a liquid mixture of geometric cis- and trans-stereoisomeric straight-chain organic compounds
DE2154073C3 (en) Process for the separation of xylene isomers and for the separation of aromatic hydrocarbons from their mixtures with non-aromatic hydrocarbons
DE2834752A1 (en) PROCESS FOR EXTRACTION OF AROMATIC HYDROCARBONS FROM HYDROCARBONS MIXTURES
DE2122770C3 (en) Process for obtaining pure aromatic hydrocarbons from their mixtures with non-aromatic hydrocarbons
DE2027833A1 (en) Process for separating liquid mixtures consisting essentially of two volatile components by distillation
DE2701466C3 (en) Process for the separation of olefinic hydrocarbons, diolefins or aromatic hydrocarbons from mixtures containing them
DE1468072A1 (en) Process for separating olefin compounds from mixtures containing non-olefinic organic compounds
DE688038C (en) Process for treating a homogeneous crude liquid mixture which cannot be separated or is difficult to separate by distillation
DE861248C (en) Process for the production of styrene
DE2005648C3 (en) Process for the separation of aromatics from hydrocarbon mixtures of any aromatic content
DE1960857B2 (en) PROCESS FOR THE SEPARATION OF HYDROCARBON MIXTURES BY MEANS OF EXTRACTIVE DISTILLATION
DE767277C (en) Process for the production of acetic acid
DE1593486C3 (en) Process for the production of benzene from Nitnerquahtat from a benzene-containing mixture of liquid hydrocarbons by countercurrent extraction

Legal Events

Date Code Title Description
8230 Patent withdrawn