Increased argon recovery from air distillation

Details Increased argon recovery from air distillation Increased argon recovery from air distillation

1985-04-29

1987-06-02

Bashore, S. Leon

Refrigeration

Processes

Circulating external gas

62 30, 62 31, 62 33, 62 34, 62 39, F25J 304

Patent

active

046700315

ABSTRACT:
Process and apparatus are disclosed for increasing argon recovery in conjunction with cryogenic distillation of air to high purity oxygen. The increased argon recovery is obtained by incorporating one or more latent heat exchangers in the flowsheet at strategic disclosed locations and between specific fluids. The invention is particularly advantageous in conjunction with LOXBOIL flowsheets, which otherwise lose O.sub.2 recovery when argon recovery is increased.

REFERENCES:
patent: 1607323 (1926-11-01), Van Nuys
patent: 1619909 (1927-03-01), Wilkinson
patent: 2316056 (1943-04-01), De Baufre
patent: 2934907 (1960-05-01), Scofield
patent: 3210951 (1965-10-01), Gaumer
patent: 3729943 (1973-05-01), Petit
patent: 4133662 (1979-01-01), Wagner

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