| abstract |
A crystalline molecular sieve adsorbent for selectively adsorbing nitrogen and argon from a gaseous mixture containing oxygen is prepared by: refluxing Zeolite A with an aq silver salt at 30-90{C for 4-8 hrs, filtering and washing the residue with water until free from silver ions and drying under reduced pressure to obtain an adsorbent of the composition: (Ag2O)x(M2/nO)y(Al2O3)6(SiO2)12.wH2O. where M may be Na, Ca, K, or Li. |