Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Patent
1998-06-29
2000-04-25
Doerrler, William
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
62620, F25J 300
Patent
active
060530073
ABSTRACT:
This invention relates generally to a separation process in which a multi-component feed stream is introduced into a separation system that operates under solids forming conditions for at least one of the feed stream components. The freezable component, although typically CO.sub.2, H.sub.2 S or another acid gas, can be any component that has the potential for forming solids in the separation system. The multi-component feed stream is introduced into a separation system, at least a portion of which operates under solids forming conditions for at least one component of the feed stream. A vapor stream is withdrawn from an upper region of the separation system and compressed to a higher pressure stream. At least a portion of the compressed stream is cooled and then expanded to a lower pressure to further cool the compressed stream. At least a portion of the expanded stream is returned to the separation system, thereby providing refrigeration to the separation system.
REFERENCES:
patent: 4889545 (1989-12-01), Campbell et al.
patent: 5062270 (1991-11-01), Haut et al.
patent: 5335504 (1994-08-01), Durr et al.
Thomas Eugene R.
Victory Donald J.
Doerrler William
ExxonMobil Upstream Research Company
Lawson Gary D.
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