Process for recovery, purification, and recycle of argon

Details Process for recovery, purification, and recycle of argon Process for recovery, purification, and recycle of argon

2005-01-04

2005-01-04

Silverman, Stanley S. (Department: 1754)

Chemistry of inorganic compounds

Inert or noble gas or compound thereof

C062S632000, C062S636000, C062S924000

Reexamination Certificate

active

06838066

ABSTRACT:
A method and system for the purification and recycle of impure argon is disclosed. The system and process of the present invention can produce very high purity argon, i.e., about 1 ppb or less of impurities. In one embodiment of the invention, a cryogenic separation apparatus is used to remove the nitrogen, hydrocarbon, and hydrogen impurities from the argon stream. A catalyst bed is then operated at ambient temperature to remove hydrogen, oxygen, and carbon monoxide impurities to provide the purified argon product. Also disclosed is a method to minimize to loss of the purified argon product during regeneration of the catalyst bed.

REFERENCES:
patent: 5106399 (1992-04-01), Fisher
patent: 5204075 (1993-04-01), Jain et al.
patent: 5706674 (1998-01-01), Hsiung et al.
patent: 6113869 (2000-09-01), Jain et al.
patent: 6123909 (2000-09-01), Yamamoto et al.
JP 489387, Japan.
JP 624962, Japan.
JP 733581, Japan.

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