Process for producing krypton and xenon

Details Process for producing krypton and xenon Process for producing krypton and xenon

1981-08-25

1983-12-20

Sever, Frank

Refrigeration

Processes

Circulating external gas

62 22, 62 30, F25J 304

Patent

active

044215363

ABSTRACT:
A process for producing krypton and xenon. The concentrations of krypton and xenon contained in liquid oxygen are not highly increased in a concentrating column to produce concentrated liquid having a relatively low concentration of methane, which is stripped of methane by contact with oxygen gas in a methane purging column to reduce the methane concentration and the methane-purged liquid is then concentrated at the lower part of the purging column. Then, the concentrated liquid is vaporized and purified by catalitic combustion and adsorption, and thereafter a mixture of krypton and xenon is separated from the purified gas in a second concentrating column.

REFERENCES:
patent: 2060940 (1936-11-01), Kahle
patent: 3222879 (1965-12-01), Stoklosinski
patent: 3596471 (1971-08-01), Streich
patent: 3768270 (1973-10-01), Schuftan
patent: 3779028 (1973-12-01), Schuftan et al.

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