Silver-exchanged zeolites and methods of manufacture therefor

Details Silver-exchanged zeolites and methods of manufacture therefor Silver-exchanged zeolites and methods of manufacture therefor

2005-06-30

2008-11-25

Smith, Duane (Department: 1797)

Gas separation: processes

Solid sorption

C502S065000, C422S169000, C096S108000

Reexamination Certificate

active

07455718

ABSTRACT:
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 π-complexation. Applications for such adsorbents include any process in which contaminants from gas streams can form π-complexes with the Ag in the zeolite, particularly the removal of CO, ethylene, propylene and the like from air and CO/H2from air in prepurifier adsorbers in the production of ultra high purity (UHP) N2.

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