Process and apparatus for the recovery of krypton and/or xenon

Details Process and apparatus for the recovery of krypton and/or xenon Process and apparatus for the recovery of krypton and/or xenon

2005-02-01

2005-02-01

Doerrler, William C. (Department: 3744)

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

C062S925000, C095S127000

Reexamination Certificate

active

06848269

ABSTRACT:
Krypton and/or xenon is separated crudely from a mixture comprising oxygen and at least one rare gas selected from the group consisting of krypton and xenon in a process comprising feeding said mixture or a mixture derived therefrom to a rare gas recovery system and separating said mixture feed in said rare gas recovery system into rare gas-lean gaseous oxygen (“GOX”) and rare gas-enriched product. The process is characterized in that at least about 50 mol % of said mixture is fed to the rare gas recovery system in the gaseous phase provided that, when said mixture feed is separated by selective adsorption, the concentration of xenon in the mixture feed is no greater than 50 times the concentration of xenon in air. One advantage of a preferred embodiment of the present invention is that it can easily be retrofitted to existing pumped LOX cycle ASUs.

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Research Disclosure Sep. 1999, Publication No. 42517, p. 1158, “Crude Krypton/Xenon Recovery from a Pumped LOX AUS Cycle”, Disclosed Anonymously.
Anonymous: “Crude Krypton/Xenon Recovery from a Pumped-LOX ASU Cycle” (Sep. 1999) Research Disclosure, Kenneth Mason Publications, Hampshire, GB, vol. 425, NR. 17 XP007124763 ISSN: 0374-4353 -whole document.

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