Refrigeration – Processes – Circulating external gas
Patent
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.
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Bonaquist Dante P.
Canney William M.
Howard Henry E.
Nash William A.
Capossela Ronald C.
O'Brien Cornelius F.
Praxair Technology Inc.
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