(19)
(11) EP 2 199 716 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.08.2012 Bulletin 2012/32

(43) Date of publication A2:
23.06.2010 Bulletin 2010/25

(21) Application number: 09178825.7

(22) Date of filing: 11.12.2009
(51) International Patent Classification (IPC): 
F25J 1/02(2006.01)
(84) Designated Contracting States:
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 SE SI SK SM TR
Designated Extension States:
AL BA RS

(30) Priority: 12.12.2008 US 333500

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

(72) Inventors:
  • Roberts, Mark Julian
    Kempton, PA 19529 (US)
  • Ott, Christopher Michael
    Allentown, PA 18103 (US)

(74) Representative: Muir, Benjamin M. J. 
Beck Greener Fulwood House 12 Fulwood Place
London WC1V 6HR
London WC1V 6HR (GB)

   


(54) Alternative pre-cooling arrangement


(57) A natural gas liquefaction system, the system comprising a first precooling refrigeration system (106) that accepts at least a natural gas feed stream (102), a second precooling refrigeration system (108) that accepts at least a first refrigerant stream (104); and a cryogenic heat exchanger (146) fluidly connected to the first precooling refrigeration system and the second precooling refrigeration system that accepts the natural gas feed stream (150) from the first precooling refrigeration system and the first refrigerant stream (138) from the second precooling refrigeration system to liquefy the natural gas feed stream (166), where the second precooling refrigeration system accepts only stream(s) having a composition different from the stream(s) accepted by the first precooling refrigeration system.







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Search report