Low energy high purity oxygen plus argon

Details Low energy high purity oxygen plus argon Low energy high purity oxygen plus argon

1984-08-20

1986-03-25

Sever, Frank

Refrigeration

Processes

Circulating external gas

62 28, 62 29, 62 31, 62 34, 62 42, F25J 304

Patent

active

045780951

ABSTRACT:
The invention provides a means of producing high purity oxygen at high recovery plus also byproduct argon while using a low air supply pressure. This is done with a triple pressure distillation arrangement (columns 101, 102, and 103 of FIG. 1) having argon stripping sections at the bottom of both the MP (102) and LP (103) columns, a liquid sidestream withdrawal (117) from the MP column, forming feed for the LP column, an intermediate reflux (118) for the LP column which reboils the MP column, and an argon removal capability.

REFERENCES:
patent: 2699046 (1955-01-01), Etienne
patent: 3688513 (1972-09-01), Streich et al.

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