PSA process and system using simultaneous top and bottom evacuation of absorbent bed
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United States of America Patent
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Apr 11, 2000
Grant Date -
N/A
app pub date -
Dec 9, 1997
filing date -
Dec 9, 1997
priority date (Note) -
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Abstract
The present invention relates to the recovery of low purity oxygen gas from the top of an adsorber vessel into a receiver tank to be used as a purge reflux gas. Recovery of void gas results in improved process efficiency. The invention may also employ a simultaneous evacuation from the top of the adsorber to remove the lower purity void gas while the main waste evacuation step is conducted. This simultaneous co-current top void gas recovery and counter-current waste evacuation from both ends of the adsorber allows for an overall increase in product recovery of between 3-5% over conventional processes.
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