Low temperature inert gas purifier

Details Low temperature inert gas purifier Low temperature inert gas purifier

1995-09-29

1999-05-11

Lewis, Michael L.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

423230, 4232391, 423247, 502335, 502337, 96108, 96121, 96132, B01J23/755

Patent

active

059025611

ABSTRACT:
A two-stage process method for removal of impurities such carbon monoxide, carbon dioxide, oxygen, water, hydrogen, and methane from inert gases at ambient temperature (0.degree.-60.degree. C.). In the first stage the inert gas is contacted with a nickel catalyst, and in the second stage the inert gas is passed over a getter alloy. Purified gas exiting the second stage of the purifier contains less than one part per billion (ppb) levels of the impurities. The nickel catalyst and getter alloy are initially activated at elevated temperature. The catalyst and getter may be reactivated by heating and purging, and hydrogen previously removed from impure gas can be used in the reactivation process.

REFERENCES:
patent: 4312669 (1982-01-01), Boffito et al.
patent: 4579723 (1986-04-01), Weltmer et al.
patent: 4713224 (1987-12-01), Tamhankar et al.
patent: 5110569 (1992-05-01), Jain
patent: 5202096 (1993-04-01), Jain
patent: 5238469 (1993-08-01), Briesacher et al.
U.S. application No. 08/505,136, Carrea et al., filed Jul. 21, 1995.

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