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US 7,169,212 B1Granted
Gas separation process
AssigneeE. I. Du Pont de Nemours and Company
InventorDavid Richard Corbin
Life of this patent
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Abstract
This invention relates to gas separation processes using a Li-rho zeolite, in particular to an air separation process where the Li-rho zeolite is an oxygen selective adsorbent.
Claims3
A process for separating oxygen from air comprising the steps of:
- (1) pressurizing an adsorbent bed containing Li-rho zeolite;
- (2) passing a pressurized air stream over the adsorbent bed;
- (3) adsorbing oxygen from the pressurized air stream to produce a nitrogen enriched stream;
- (4) withdrawing the nitrogen enriched stream from the adsorbent bed;
- stopping the flow of the pressurized air stream;
- (5) depressurizing the adsorbent bed;
- and optionally, purging the adsorbent bed with the nitrogen enriched stream from step (4);
- and
- (6) repeating steps 1 through 5 in a cyclic fashion.
6 more elements
Dependencies are inferred from the claim text.