Process for recovering oxygen enriched gas
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United States of America Patent
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Apr 17, 1990
Grant Date -
N/A
app pub date -
Feb 23, 1989
filing date -
Mar 17, 1988
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Expired
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Abstract
A process for recovering an oxygen enriched gas from a mixed gas mainly composed of nitrogen gas and oxygen gas by means of PSA comprising: providing two adsorbers A and B packed with zeolite molecular sieve as the adsorbent and a gas reservoir for accumulating the recovered oxygen enriched gas which is connected to the outlet side of each adsorber and used in common to both adsorbers, introducing the mixed gas into adsorber A to adsorb nitrogen gas, and desorbing nitrogen has previously adsorbed in adsorber B therefrom under reduced pressure. Introduction, adsorption and desorption are carried out according to adsorption, desorption, rinsing, recovering, pressure accumulation and pressurization steps in turn with alternation of adsorbers A and B.
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