RECOVERY OF KRYPTON AND XENON FROM LIQUID OXYGEN

Xenon and/or krypton is separated from a liquid oxygen stream 115 comprising oxygen and xenon and/or krypton in a process comprising providing at least a portion of the liquid oxygen stream 115 as a reflux liquid to the top of a rare gas recovery column 127 operated at a pressure of between 5 to 25...

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Bibliographic Details
Main Authors BERGER, Alan D, HERRON, Donn Michael, LUO, Xukun
Format Patent
LanguageEnglish
French
German
Published 23.06.2021
Subjects
BLASTING
COMBINED HEATING AND REFRIGERATION SYSTEMS
HEAT PUMP SYSTEMS
HEATING
LIGHTING
LIQUEFACTION SOLIDIFICATION OF GASES
LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS
MANUFACTURE OR STORAGE OF ICE
MECHANICAL ENGINEERING
MIXTURES BY PRESSURE AND COLD TREATMENT
REFRIGERATION OR COOLING
WEAPONS
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Summary:Xenon and/or krypton is separated from a liquid oxygen stream 115 comprising oxygen and xenon and/or krypton in a process comprising providing at least a portion of the liquid oxygen stream 115 as a reflux liquid to the top of a rare gas recovery column 127 operated at a pressure of between 5 to 25 bara, vaporizing a reboiler liquid in the reboiling zone 193 in the bottom of the rare gas recovery column 127 to produce a mixture of a rising vapor and a xenon and/or krypton-enriched liquid stream 151; and contacting the rising vapor with the reflux liquid in at least one distillation zone 192 of the column 127 to effect stripping xenon and/or krypton from the rising vapor to the reflux liquid. The process provides a recovery of xenon of greater than 90% and a krypton recovery of 15% to 90%.
Bibliography:Application Number: EP20200214163