Oxygen enrichment process
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United States of America Patent
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Dec 21, 1999
Grant Date -
N/A
app pub date -
Feb 24, 1992
filing date -
Mar 1, 1991
priority date (Note) -
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Abstract
In an adsorptive alternating pressure process for the enrichment of air with oxygen using a molecular sieve zeolite in an adsorber, wherein adsorbed components are desorbed under a pressure below the pressure at which air separation and N.sub.2 adsorption is effected and, after desorption, the molecular sieve adsorber is at least partly returned to the air separation pressure with oxygen gas produced in countercurrent to the air separation gas flow, the improvement which comprises cooling product gas and covering the molecular sieve adsorber with the cooled product gas.
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