Enrichment of krypton in oxygen/nitrogen mix gas
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United States of America Patent
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-
Nov 10, 1998
Grant Date -
N/A
app pub date -
May 20, 1997
filing date -
May 20, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Krypton present in a trace amount in a gaseous oxygen/nitrogen mixture is effectively enriched by an adsorption/desorption process of the pressure variation mode using a system including at least three fixed bed adsorption columns packed with hydrogenated mordenite. At the end of adsorption operation in one column, a desorbed gas from another column is fed to the one column under substantially the same pressure as the pressure during adsorption operation for fully washing the one column. Thereafter, the one column is subject to desorption operation.
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