Process and apparatus for air fractionation by rectification

Details Process and apparatus for air fractionation by rectification Process and apparatus for air fractionation by rectification

1992-08-13

1993-10-12

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 41, F25J 304

Patent

active

052514498

ABSTRACT:
For air fractionation by two-stage rectification with subsequent production of crude argon, a component stream of the crude argon stream (25, 31) withdrawn from the crude argon column (2) is condensed (35) in indirect heat exchange (34) with a liquid oxygen product stream (40) from the medium pressure column (4), the oxygen product stream (40) being partially vaporized. The condensed crude argon (35) is then recycled into the crude argon column (20). A second component stream of the crude argon is obtained as the product (24).

REFERENCES:
patent: 4533375 (1985-08-01), Erickson
patent: 4575388 (1986-03-01), Okada
patent: 4747860 (1988-03-01), Atkinson
patent: 4822395 (1989-04-01), Cheung
patent: 4932212 (1990-06-01), Rohde
patent: 4935044 (1990-06-01), Schoenpflug
patent: 5034043 (1991-06-01), Rottmann
patent: 5036672 (1991-08-01), Rottmann

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