SILVER-EXCHANGED ZEOLITES AND METHODS OF MANUFACTURE THEREFOR

摘要

The present invention relates generally to zeolites having a silica/alumina ratio of less than or equal to 10 (Si/Al<=10) that are exchanged with Ag+ and thermally treated in such a way to favor adsorption over alternative catalytic and chemically reactive functionalities. The adsorbents of the present invention and the method of producing such adsorbents maximize the working adsorption capacity through pi-complexation. Applications for such adsorbents include any process in which contaminants from gas streams can form pi-complexes with the Ag in the zeolite, particularly the removal of CO, ethylene, propylene and the like from air and CO/H2 from air in prepurifier adsorbers in the production of ultra high purity (UHP) N2.