Bulk nitrogen purification process that requires no hydrogen in

Details Bulk nitrogen purification process that requires no hydrogen in Bulk nitrogen purification process that requires no hydrogen in

1997-06-23

1999-11-30

Griffin, Steven P.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

423219, 423225, 423230, 423247, 423248, B01D 5334

Patent

active

059937602

ABSTRACT:
A process for removing parts-per-million quantities of unwanted species such as oxygen, carbon monoxide, hydrogen, carbon dioxide and water from a cryogenically produced nitrogen gas stream using an oxygen removal step prior to a nickel-based catalytic adsorption step in order to eliminate the need for hydrogen regeneration in either step. Ultrapure nitrogen heated to less than 500.degree. C. is used to purge and hold the beds used for unwanted species removal, eliminating the need for hydrogen regeneration thus reducing the regeneration cycle time and cost.

REFERENCES:
patent: 4579723 (1986-04-01), Weltmer et al.
patent: 4713224 (1987-12-01), Tamhankar et al.
patent: 4869883 (1989-09-01), Thorogood et al.
patent: 5536302 (1996-07-01), Golden et al.

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