Vacuum swing adsorption for air fractionation
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United States of America Patent
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Apr 28, 1981
Grant Date -
N/A
app pub date -
Feb 28, 1979
filing date -
Feb 28, 1979
priority date (Note) -
Expired
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Abstract
The water content of high purity nitrogen obtained by vacuum swing adsorptive fractionation of ambient air, is removed in a companion thermal swing drying system operated in association with the air fractionation system but at independent cycle time period, wherein water-laden nitrogen from the air fractionation system is passed through a desiccant bed of solid water-retaining adsorbent in said drying system while withdrawing dry nitrogen of high purity therefrom, and the adsorbed water is subsequently removed from said desiccant adsorbent by regeneration thereof with heated dry air effluent obtained in rinsing the air fractionating column with desorbed process nitrogen.
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