Cryogenic air separation process and apparatus

Details Cryogenic air separation process and apparatus Cryogenic air separation process and apparatus

1998-02-04

1999-12-07

Doerrler, William

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62640, F25J 304

Patent

active

059963735

ABSTRACT:
A cryogenic air separation process and apparatus in a distillation column having a top condenser. Air is compressed, purified and cooled to a temperature suitable for distillation. The air is separated in a distillation column so that an oxygen-enriched liquid and a nitrogen-enriched gas are produced within the column. A stream of cryogenic liquid is sent to the column and an oxygen-enriched liquid is sent from the column to the condenser. The flow rate of cryogenic liquid is regulated as a function of the level of oxygen-enriched liquid at the bottom of the column, and a product stream is withdrawn from the column.

REFERENCES:
patent: 4617040 (1986-10-01), Yoshino
patent: 4698079 (1987-10-01), Yoshino
patent: 4732595 (1988-03-01), Yoshino
patent: 4853015 (1989-08-01), Yoshino
patent: 5437160 (1995-08-01), Darredeau et al.

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