Air separation method and apparatus

Details Air separation method and apparatus Air separation method and apparatus

1986-05-12

1988-02-09

Makay, Albert J.

Refrigeration

Processes

Circulating external gas

62 22, 62 32, 62 42, F25J 302

Patent

active

047239751

ABSTRACT:
In a method and apparatus for separating air a distillation zone is employed to separate air into an oxygen-enriched liquid fraction and a nitrogen-enriched vapor-fraction. A first stream is taken from the nitrogen-enriched vapor fraction and is mixed with a stream taken from the oxygen-enriched liquid fraction. At least part of the resultant mixture is employed to perform a refrigeration duty, for example the condensation of nitrogen-enriched vapor to provide reflux for the distillation column.

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patent: 3760596 (1973-09-01), Basih et al.
patent: 4137056 (1979-01-01), Golovko
patent: 4372765 (1983-02-01), Tamura et al.
patent: 4575388 (1986-03-01), Okada
patent: 4578095 (1986-03-01), Erickson

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