Purification of helium

Details Purification of helium Purification of helium

1985-03-18

1987-06-23

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 23, 55 68, 55158, B01D 5322

Patent

active

046750304

ABSTRACT:
Helium contaminated with minor amounts of air, water vapor and carbon dioxide and from an envelope (10) is compressed in a compressor (12) and thereafter cooled in cooler (18) and fed via water separator (20) to a first of two substantially helium-permeable, oxygen
itrogen-impermeable membranes (28,34), the permeate from which is substantially pure helium. The impermeate still containing helium is fed to the second membrane (34), the permeate from which is recycled to the first membrane while the impermeate is rejected with little loss of helium. The method is useful in purifying helium in an airship or balloon.

REFERENCES:
patent: 2540152 (1951-02-01), Weller
patent: 3085379 (1963-04-01), Kiyonaga et al.
patent: 3172741 (1965-03-01), Jolley
patent: 3246449 (1966-04-01), Stern et al.
patent: 3250080 (1966-05-01), Garwin
patent: 3256675 (1966-06-01), Robb
patent: 3324626 (1967-06-01), Dresser et al.
patent: 3350844 (1967-11-01), Robb
patent: 3713271 (1973-01-01), Franz et al.
patent: 4239507 (1980-12-01), Benoit et al.
patent: 4482360 (1984-11-01), Taketomo et al.

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