Cryogenic process for the production of methane-free, krypton/xe

Details Cryogenic process for the production of methane-free, krypton/xe Cryogenic process for the production of methane-free, krypton/xe

1991-02-05

1991-11-12

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

55 66, 423262, F25J 304

Patent

active

050637460

ABSTRACT:
The present invention relates to a process for the production of kryton and xenon by using a vapor stream containing greater than 2% oxygen to strip a liquid stream containing oxygen, krypton, methane and xenon of methane. This is accomplished by properly adjusting the liquid to vapor flows in the distillation column. The use of a suitable reflux liquid will decrease the loss of krypton and xenon in the methane laden vapor stream leaving the distillation system.

REFERENCES:
patent: 3596471 (1971-08-01), Streich
patent: 3751934 (1973-08-01), Frischbier
patent: 4384876 (1983-05-01), Mori et al.
patent: 4401448 (1983-08-01), LaClair
patent: 4421536 (1983-12-01), Mori et al.
patent: 4647299 (1987-03-01), Cheung

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