Cryogenic air separation process producing elevated pressure nit

Details Cryogenic air separation process producing elevated pressure nit Cryogenic air separation process producing elevated pressure nit

1993-09-15

1994-10-18

Capossela, Ronald C.

Refrigeration

Storage of solidified or liquified gas

With sorbing or mixing

62 25, 62 38, F25J 300

Patent

active

053556828

ABSTRACT:
The process of the present invention is a cryogenic air separation process with three important features: (1) at least a portion of a nitrogen-rich liquid from the column system is boosted in pressure before being vaporized and delivered as a product; (2) at least a portion of the feed air is at least partially condensed in indirect heat exchange with the boosted pressure, nitrogen-rich stream; and (3) a portion of the liquid nitrogen condensed from the vapor nitrogen from the top of the higher pressure column is returned to the higher pressure column as reflux with the remaining portion being removed from the column system.

REFERENCES:
patent: 3426543 (1969-02-01), Becker
patent: 4006001 (1977-02-01), Schonplug
patent: 4717410 (1988-01-01), Grenier
patent: 5098457 (1992-03-01), Cheung
patent: 5148680 (1992-09-01), Dray
patent: 5303556 (1994-04-01), Dray et al.

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