Process for the production of argon

Details Process for the production of argon Process for the production of argon

1987-07-29

1989-04-04

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

55 66, 62 22, F25J 300

Patent

active

048173924

ABSTRACT:
The present invention is a process for the production and recovery of an O.sub.2 -lean argon stream from a gas mixture containing argon and oxygen. The argon-containing gas mixture is initially treated in a cryogenic separation unit to produce a crude argon stream having an argon concentration between 80-98%. The crude argon stream is passed to a membrane separation unit where it is separated to produce an O.sub.2 -lean argon stream and an O.sub.2 - rich stream. The O.sub.2 -rich stream is recycled tothe cryogenic separation unit and the O.sub.2 -lean argon stream is recovered as product or futher purified.

REFERENCES:
patent: 4144038 (1979-03-01), Armond
patent: 4421531 (1983-12-01), Dalton, Jr. et al.
patent: 4477265 (1984-10-01), Kumar et al.
patent: 4687498 (1987-08-01), MacLean et al.
patent: 4732580 (1988-03-01), Jain et al.

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