Process for the separation of gas mixtures containing oxygen and

Details Process for the separation of gas mixtures containing oxygen and Process for the separation of gas mixtures containing oxygen and

1997-09-08

1999-07-13

Spitzer, Robert

Gas separation: processes

Solid sorption

Including reduction of pressure

95103, 95117, 95130, B01D 53047

Patent

active

059221070

ABSTRACT:
A process for the separation of a gas mixture containing oxygen and nitrogen, including bringing the mixture into contact in an adsorption zone with a first selective adsorbent for nitrogen of faujasite type exchanged to at least 80% with lithium, in which the Si/Al ratio is lower than 1.5 and a second selective adsorbent for nitrogen of zeolite type exchanged with divalent cations such as the alkaline-earth metal or transition metal cations. The second adsorbent is characterized by a nitrogen adsorptivity C.sub.2 lower than the nitrogen adsorptivity C.sub.1 characterizing the first adsorbent, and an adsorption selectivity for nitrogen in relation to oxygen (1.times.10.sup.5 Pa, 20.degree. C.) higher than or equal to 3.

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