Dry, high purity nitrogen production process and system
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United States of America Patent
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Jun 19, 1990
Grant Date -
N/A
app pub date -
May 12, 1989
filing date -
May 12, 1989
priority date (Note) -
Expired
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Abstract
Feed air to a prepurifier adsorption system/cryogenic air separation system for dry, high purity nitrogen and/or oxygen production is dried in a membrane dryer preferably characterized by a countercurrent flow path. Drying is enhanced by the use of purge gas on the permeate side of the membrane dryer, which adsorption system or cryogenic air separation system product or waste gas, dried feed air or ambient air being used as purge gas.
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