Process for maximizing the recovery of argon from an air separat

Details Process for maximizing the recovery of argon from an air separat Process for maximizing the recovery of argon from an air separat

1993-02-01

1994-05-24

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 37, 364501, F25J 304

Patent

active

053138007

ABSTRACT:
The present invention is a process for maximizing the recovery of argon at high argon recovery rates from an air separation system having a high and low pressure distillation column containing multiple distillation stages of rectification and having a sidearm column for argon recovery. A compositional measurement is made of a process variable at one or more preselected stages of rectification which have been identified as exhibiting high sensitivity to plant process variations. The total nitrogen content in the argon feed may then be computed by simulated mathematical correlation from such compositional measurement.

REFERENCES:
patent: 2934907 (1960-03-01), Scofield
patent: 2934908 (1960-05-01), Latimer
patent: 3912476 (1975-10-01), Mikawa et al.
patent: 4734114 (1988-03-01), Tasaka et al.
patent: 4784677 (1988-11-01), Al-Chalabi
patent: 4801209 (1989-01-01), Wadlow
patent: 4842625 (1989-06-01), Allam et al.

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