(19)
(11) EP 4 464 961 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.02.2025 Bulletin 2025/08

(43) Date of publication A2:
20.11.2024 Bulletin 2024/47

(21) Application number: 24174443.2

(22) Date of filing: 07.05.2024
(51) International Patent Classification (IPC): 
F25J 1/00(2006.01)
(52) Cooperative Patent Classification (CPC):
F25J 2235/50; F25J 3/04878; F25J 3/04412; F25J 3/04303; F25J 3/0409; F25J 3/04963; F25J 2245/50; F25J 3/04812; F25J 3/04769; F25J 2240/46; F25J 2200/20; F25J 3/04321; F25J 3/04678
(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH MA MD TN

(30) Priority: 12.05.2023 JP 2023079342

(71) Applicant: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE
75007 Paris (FR)

(72) Inventors:
  • HIROSE, Kenji
    KOBE, 651-0087 (JP)
  • DAISUKE, Nagata
    KOBE, 651-0087 (JP)
  • CHIAWEEFERN, Jennifer
    94503 CHAMPIGNY SUR MARNE (FR)

(74) Representative: Air Liquide 
L'Air Liquide S.A. Direction de la Propriété Intellectuelle 75, Quai d'Orsay
75321 Paris Cedex 07
75321 Paris Cedex 07 (FR)

   


(54) AIR SEPARATION UNIT AND PROCESS FOR PRODUCING A PRODUCT GAS FROM FEED AIR BY CRYOGENIC DISTILLATION


(57) An air separation unit comprises a first rectification column (2), having a top condenser (31) and a second rectification column (4) placed side by side, a heat exchanger (101), a first pump (11) and a second pump (12) connected in parallel, the first pump being capable of producing liquid at a first liquid pressure and the second pump being capable of producing liquid at a second liquid pressure, higher than the first pressure, each pump having an inlet connected to the second column, a first outlet of the first pump being connected to a first outlet conduit (L13), a second outlet of the second pump being connected to a second outlet conduit (L12), the first and second outlet conduits being connected to the condenser section .







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