(19)
(11) EP 3 048 400 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.11.2016 Bulletin 2016/47

(43) Date of publication A2:
27.07.2016 Bulletin 2016/30

(21) Application number: 16000122.8

(22) Date of filing: 20.01.2016
(51) International Patent Classification (IPC): 
F25J 1/00(2006.01)
F25J 3/02(2006.01)
 F25J 1/02(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
MA MD

(30) Priority: 23.01.2015 US 201514604030

(71) Applicant: AIR PRODUCTS AND CHEMICALS, INC.
Allentown, PA 18195-1501 (US)

(72) Inventors:
  • Truong, Timothy
    Macungie, PA 18062 (US)
  • Krishnamurthy, Gowri
    Sellersville, PA 18960 (US)
  • Roberts, Mark Julian
    Kempton, PA 19529 (US)

(74) Representative: Kador & Partner 
Corneliusstraße 15
80469 München
80469 München (DE)

   


(54) IMPROVED SEPARATION OF HEAVY HYDROCARBONS AND NGLS FROM NATURAL GAS IN INTEGRATION WITH LIQUEFACTION OF NATURAL GAS


(57) Described herein is a method of and system for fractionating and liquefying a natural gas feed stream. The natural gas is first fractionated in a scrub column. The overhead vapor from the scrub column is cooled, condensed and divided to form a first, a second and at least one further stream of liquefied first overhead. The first stream of liquefied first overhead is returned to the scrub column as a reflux stream. The second stream of liquefied first overhead forms an LNG product. The further stream of liquefied first overhead is used to provide or generate reflux for a de-methanizer column used to fractionate the bottoms liquid from the scrub column.







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