Separation of air

Details Separation of air Separation of air

1999-03-23

2000-07-04

Capossela, Renald

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62646, F25J 300

Patent

active

06082137&

ABSTRACT:
A double rectification column air separation method and apparatus in which a stream of oxygen-enriched liquid air from a higher pressure rectification column is at least partially vaporized in indirect heat exchange with a stream of purified, compressed, gaseous air. The stream of purified, compressed air is condensed and a stream of the resulting vapor after having been warmed is expanded in a turbine with the performance of external work. After expansion, the resulting vapor is introduced into the lower pressure rectification column and a stream of the resulting condensed air is introduced into the higher pressure column at an intermediate mass exchange level thereof.

REFERENCES:
patent: 2753698 (1956-07-01), Jakob
patent: 4936099 (1990-06-01), Woodward et al.
patent: 5901576 (1999-05-01), Agrawal et al.
patent: 5956974 (1999-09-01), Agrawal et al.

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