Process for the recovery of argon

Details Process for the recovery of argon Process for the recovery of argon

1987-03-20

1988-08-09

Warner, Steven E.

Refrigeration

Processes

Circulating external gas

62 22, 62 29, 62 31, 62 34, 62 40, F25S 302

Patent

active

047625422

ABSTRACT:
There is disclosed an improved process for recovering argon from a tail gas stream, preferably a tail gas obtained from a hydrogen recovery unit processing a purge gas obtained in the synthesis of ammonia and comprised of argon, methane, nitrogen, and residual quantities of hydrogen, wherein the tail gas is partially liquefied prior to introduction into a first fractionation column to form a bottoms liquid stream comprised of argon and methane wherein such liquid stream is thereupon introduced into a second fractionation column to separate argon as an overhead gaseous stream which is condensed to form liquid argon or as product.

REFERENCES:
patent: 354328 (1970-12-01), Crawford et al.
patent: 2530602 (1950-11-01), Dennis
patent: 3173778 (1965-03-01), Gaumer, Jr.
patent: 4338108 (1982-07-01), Isalski et al.
patent: 4496382 (1985-01-01), Geist et al.
patent: 4501600 (1985-02-01), Pahade
patent: 4549890 (1985-10-01), Bligh
patent: 4629484 (1986-12-01), Kister

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