Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Patent
1997-05-14
1998-07-28
Capossela, Ronald C.
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
62908, 95106, 95138, 95140, F25J 100
Patent
active
057848980
ABSTRACT:
A process and apparatus for the preparation of a cryogenic fluid in the high purity liquid state, such as liquid argon, liquid helium or liquid nitrogen of high purity, substantially free from at least one of the impurities which it contains. The cryogenic fluid in the liquid state to be purified is placed in contact with an adsorbent permitting the adsorption of at least one of the impurities, and the cryogenic fluid is recovered in the high purity liquid state, characterized in that cooling of at least a proportion of the adsorbent is maintained with purified cryogenic fluid in the liquid state during at least a part of the duration of the stoppage stage separating a purification cycle N and a purification cycle N+1, which are successive.
REFERENCES:
patent: 4150548 (1979-04-01), Kemp et al.
patent: 4717406 (1988-01-01), Giacobbe
patent: 5425242 (1995-06-01), Dunne et al.
patent: 5551257 (1996-09-01), Jain
Capossela Ronald C.
L'Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation de
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