Gas separation: processes – Solid sorption – Including reduction of pressure
Reexamination Certificate
2007-10-23
2007-10-23
Hopkins, Robert A. (Department: 1724)
Gas separation: processes
Solid sorption
Including reduction of pressure
C095S097000, C095S098000, C095S102000, C095S104000, C095S105000, C095S106000, C095S127000, C095S148000
Reexamination Certificate
active
10996743
ABSTRACT:
A first aspect of a process of recovering xenon from feed gas includes: providing an adsorption vessel containing adsorbent having a Xe/N2selectivity ratio <75; feeding into the adsorption vessel feed gas having an initial nitrogen concentration >50% and an initial xenon concentration ≧0.5%; evacuating the adsorption vessel; and purging the adsorption vessel at a purge-to-feed ratio ≧10. The final xenon concentration is ≧15× the initial xenon concentration. A second aspect of the process includes providing an adsorption vessel containing adsorbent having a Xe Henry's law Constant ≧50 mmole/g/atm; feeding into the adsorption vessel feed gas having an initial nitrogen concentration >50% and an initial xenon concentration ≧0.5%; heating and purging the adsorption vessel to recover xenon having a final concentration ≧15× its initial concentration. Apparatus for performing the process are also described.
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Farris Thomas Stephen
Golden Timothy Christopher
Ji Bing
Karwacki, Jr. Eugene Joseph
Motika Stephen Andrew
Air Products and Chemicals Inc.
Chase Geoffrey L.
Hopkins Robert A.
Yang Lina
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