| (19) |
 |
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(11) |
EP 4 495 521 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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23.04.2025 Bulletin 2025/17 |
| (43) |
Date of publication A2: |
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22.01.2025 Bulletin 2025/04 |
| (22) |
Date of filing: 20.12.2022 |
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| (51) |
International Patent Classification (IPC):
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| (84) |
Designated Contracting States: |
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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 |
| (30) |
Priority: |
30.12.2021 US 202163295509 P
26.08.2022 US 202217896953
26.08.2022 US 202217896967
|
| (62) |
Application number of the earlier application in accordance with Art. 76 EPC: |
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22854255.1 / 4457478 |
| (71) |
Applicant: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET
L'EXPLOITATION DES PROCEDES GEORGES CLAUDE |
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75007 Paris (FR) |
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| (72) |
Inventors: |
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- TURNEY, Mike
Houston, 77024 (US)
- GUILLARD, Alain
Houston, 77024 (US)
- CHAN, Bobby
Houston, 77024 (US)
|
| (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) |
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| |
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Remarks: |
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MISSING OR CORRECT PARTS INCLUDED UNDER RULE 56(3) or RULE 56a(4) EPC |
|
| (54) |
PROCESS FOR PRECOOLING HYDROGEN FOR LIQUEFACTION WITH SUPPLEMENT LIQUID NITROGEN |
(57) A hydrogen feed stream is introduced into a primary refrigeration system of a precooling
system and cooling the hydrogen stream to a first precooling temperature. From there,
the precooled hydrogen stream is then introduced to a secondary refrigeration system
of the precooling system and cooling the precooled hydrogen stream to a second temperature.
Next, the cooled hydrogen stream is then liquefied in the liquefaction system to produce
liquid hydrogen.