Cryogenic process for the production of an oxygen-free and metha

Details Cryogenic process for the production of an oxygen-free and metha Cryogenic process for the production of an oxygen-free and metha

1991-02-05

1991-11-26

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

55 66, 423262, F25J 304

Patent

active

050679767

ABSTRACT:
The present invention relates to a process for the production of kryton and xenon by using an oxygen-free vapor stream to strip a liquid stream containing oxygen, krypton, methane, and xenon of methane and oxygen. This is accomplished by properly controlling the liquid to vapor flow ratio in the distillation column so that such ratio is less than 0.15. A suitable reflux liquid is used to decrease the loss of krypton and xenon in the methane and oxygen 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: 4401488 (1983-08-01), La Clair
patent: 4421536 (1983-12-01), Mori et al.
patent: 4647299 (1987-03-01), Cheung

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