Cryogenic rectification system for producing argon and lower pur

Details Cryogenic rectification system for producing argon and lower pur Cryogenic rectification system for producing argon and lower pur

1996-12-12

1997-11-04

Capossela, Ronald C.

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62924, F25J 302

Patent

active

056827652

ABSTRACT:
A cryogenic rectification system wherein additional stripping vapor for the lower pressure column of a double column is produced from higher pressure column bottoms and feed for the argon column is taken from the upper portion of the lower pressure column and first processed through a stripping column. Lower purity oxygen is recovered either directly from the lower pressure column or after first being processed in an auxiliary column which additionally produces higher purity oxygen.

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patent: 5440884 (1995-08-01), Bonaquist et al.
patent: 5469710 (1995-11-01), Howard et al.
patent: 5490391 (1996-02-01), Hogg et al.
patent: 5528906 (1996-06-01), Naumovitz et al.
patent: 5533339 (1996-07-01), Clare et al.

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