Process for producing nitrogen dioxide-free oxygen-enriched gas

Details Process for producing nitrogen dioxide-free oxygen-enriched gas Process for producing nitrogen dioxide-free oxygen-enriched gas

1974-11-27

1976-01-06

Adee, John

Gas separation

Means within gas stream for conducting concentrate to collector

55 68, 55 90, B01D 5322, B01D 5316

Patent

active

039308138

ABSTRACT:
Membrane permeation processes to produce oxygen-enriched gas from atmospheric air are improved by initially contacting an ambient air feed with triethanolamine to substantially reduce the nitrogen dioxide content in the air and thereafter feeding the nitrogen dioxide depleted air to an array of membrane cells and finally withdrawing the oxygen-enriched permeate output therefrom, substantially free of nitrogen dioxide, for further use.

REFERENCES:
patent: 2966235 (1960-12-01), Kammermeyer
patent: 3121624 (1964-02-01), Matsch et al.
patent: 3280536 (1966-10-01), Berlin
patent: 3369343 (1968-02-01), Robb
patent: 3463603 (1969-08-01), Freitas et al.
patent: 3784478 (1974-01-01), Altwicker et al.

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