Production of oxygen enriched air

Details Production of oxygen enriched air Production of oxygen enriched air

1985-03-19

1987-08-11

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 62, 55 68, 55 75, B01D 5304

Patent

active

046859390

ABSTRACT:
A pressure swing adsorption process is provided for the direct production from ambient air of a moderately enriched oxygen product gas. The production of a product gas having an oxygen concentration of 23 to 30% is effected by a three step cycle wherein (1) the feed air is charged to a bed of nitrogen selective adsorbent until the bed is brought from atmospheric pressure to a pressure in the range of up to 10 atmospheres, (2) reducing the bed pressure to an intermediate level by withdrawal of oxygen enriched product gas therefrom and (3) finally venting the bed to restore atmospheric pressure. By an alternative mode including a fourth step of purging the bed following the venting step, a product of 23 to 45% oxygen concentration is obtained.

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