FR2414947A1 - Raw natural gas pretreatment prior to liquefaction - by removing acid gases, drying, expanding, scrubbing and fractionating to give methane, ethane and propane - Google Patents

Raw natural gas pretreatment prior to liquefaction - by removing acid gases, drying, expanding, scrubbing and fractionating to give methane, ethane and propane

Info

Publication number
FR2414947A1
FR2414947A1 FR7801510A FR7801510A FR2414947A1 FR 2414947 A1 FR2414947 A1 FR 2414947A1 FR 7801510 A FR7801510 A FR 7801510A FR 7801510 A FR7801510 A FR 7801510A FR 2414947 A1 FR2414947 A1 FR 2414947A1
Authority
FR
France
Prior art keywords
stream
liquefaction
expanding
scrubbing
hydrocarbon
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.)
Granted
Application number
FR7801510A
Other languages
French (fr)
Other versions
FR2414947B1 (en
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.)
Honeywell UOP LLC
Original Assignee
UOP LLC
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 UOP LLC filed Critical UOP LLC
Priority to FR7801510A priority Critical patent/FR2414947A1/en
Publication of FR2414947A1 publication Critical patent/FR2414947A1/en
Application granted granted Critical
Publication of FR2414947B1 publication Critical patent/FR2414947B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/005—Processes comprising at least two steps in series
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Water Supply & Treatment (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

Raw natural gas at >800 psig is pretreated prior to liquefaction by a process comprising (a) passing the stream to a sweetening zone for removal of acid gases (CO2 and H2S), (b) passing the stream to a first drying zone to form a dry gas stream having a dew point of -20 degrees F, (c) expanding the stream in an energy recovery means (developing shaft horsepower) to 300 psig, (d) scrubbing the stream with a lean hydrocarbon liq. to remove from it all >2C hydrocarbon and form a CH4-rich gas stream (I) and a rich liq. hydrocarbon stream (II), (e) passing (I) to a solid desiccant drying zone to form a dry gas stream having a dew point of -240 degrees F, (f) fractionating (II) to separate streams rich in methane, ethane and propane respectively and obtain a >=4C liq. hydrocarbon stream (III), and (g) dividing (III) into two portions and passing one portion as the lean hydrocarbon liq. to the scrubbing zone in step (d). Liquefaction refrigeration power requirements are reduced by utilising the energy recovered in expanding the raw gas. The volume of gas which must be dried in expensive desiccant beds prior to liquefaction is reduced.
FR7801510A 1978-01-19 1978-01-19 Raw natural gas pretreatment prior to liquefaction - by removing acid gases, drying, expanding, scrubbing and fractionating to give methane, ethane and propane Granted FR2414947A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7801510A FR2414947A1 (en) 1978-01-19 1978-01-19 Raw natural gas pretreatment prior to liquefaction - by removing acid gases, drying, expanding, scrubbing and fractionating to give methane, ethane and propane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7801510A FR2414947A1 (en) 1978-01-19 1978-01-19 Raw natural gas pretreatment prior to liquefaction - by removing acid gases, drying, expanding, scrubbing and fractionating to give methane, ethane and propane

Publications (2)

Publication Number Publication Date
FR2414947A1 true FR2414947A1 (en) 1979-08-17
FR2414947B1 FR2414947B1 (en) 1980-07-04

Family

ID=9203650

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7801510A Granted FR2414947A1 (en) 1978-01-19 1978-01-19 Raw natural gas pretreatment prior to liquefaction - by removing acid gases, drying, expanding, scrubbing and fractionating to give methane, ethane and propane

Country Status (1)

Country Link
FR (1) FR2414947A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3664091A (en) * 1969-06-27 1972-05-23 Fish Engineering & Constructio Process and system for removing acid gas from natural gas

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3664091A (en) * 1969-06-27 1972-05-23 Fish Engineering & Constructio Process and system for removing acid gas from natural gas

Also Published As

Publication number Publication date
FR2414947B1 (en) 1980-07-04

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Legal Events

Date Code Title Description
ST Notification of lapse