Refrigeration – Processes – Circulating external gas
Patent
1987-07-16
1988-11-15
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
23293R, F25J 300
Patent
active
047846771
ABSTRACT:
The present invention relates to methods and apparatus for controlling a process for the separation of air to obtain oxygen, argon, and nitrogen products, and more particularly for controlling the composition of the feedstream to a column for producing crude argon. The nitrogen content of the feedstream is directly analyzed in real time and maintained within a preselected range. The results of the analysis is used to control the operation of the process, for example, by adjusting the reflux or product withdrawal rates. Argon production is thereby maximized without risking a dumping phenomenon in the crude argon column.
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Capossela Ronald C.
Cassett Larry R.
Konkol Chris P.
Swope R. Hain
The BOC Group Inc.
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