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AssigneeAir Products and Chemicals, Inc.
InventorsMagdalena M. Lozinska, Paul A. Wright, Elliott L. Bruce, William Jack Casteel, Jr., Shubhra Jyoti Bhadra, Robert Quinn, Garret Chi-Ho Lau, Erin Marie Sorensen, Roger Dean Whitley, Timothy Christopher Golden, Mohammad Ali Kalbassi
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Disclosed herein are novel RHO zeolites useful as kinetically selective adsorbents for oxygen and/or nitrogen. The adsorbents can be used in pressure swing adsorption processes for selectively adsorbing oxygen and/or nitrogen from feed streams such as an air stream or crude argon stream. Also disclosed are novel methods of preparing RHO zeolites, including in particular mixed-cation RHO zeolites.
A RHO zeolite having a Si/Al ratio of from 3.2 to 4.5 and containing non-proton extra-framework cations, wherein the zeolite contains at most 1 proton per unit cell, and wherein the size, number and charge of the extra-framework cations that are present in the zeolite are such that 1 or fewer non-proton extra-framework cations per unit cell are required to occupy 8-ring sites.
Dependencies are inferred from the claim text.