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AssigneeAir Products and Chemicals, Inc.
InventorsShubhra Jyoti Bhadra, Roger Dean Whitley, William Jack Casteel, Jr., Timothy Christopher Golden, Garrett Chi-Ho Lau, Erin Marie Sorensen, Robert Quinn, Magdalena M. Lozinska, Paul A. Wright, Mohammad Ali Kalbassi
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Disclosed herein are new processes for adsorbing oxygen using adsorbent compositions comprising RHO zeolites kinetically selective for oxygen. The RHO zeolites can be used in pressure swing adsorption processes for separating oxygen from oxygen containing streams, such as for, but not limited to, purifying a crude argon feed stream or separating oxygen from an air feed stream.
A process of adsorbing oxygen from a feed stream containing oxygen, comprising passing the feed stream through a bed of an adsorbent selective for oxygen so as to adsorb oxygen from the feed stream, thereby producing a product stream depleted in oxygen, wherein the adsorbent comprises a RHO zeolite having a Si/Al ratio of from 3.2 to 4.5 and containing non-proton extra-framework cations, wherein the size, number, and charge of the extra-framework cations that are present in the zeolite are such that 1.8 or fewer non-proton extra-framework cations per unit cell are required to occupy 8-ring sites, and wherein the zeolite has a unit cell axis length of from 14.23 Å to 14.55 Å.
Dependencies are inferred from the claim text.