Apparatus and method for purifying air used in cryogenic air separation
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United States of America Patent
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Nov 30, 2004
Grant Date -
Feb 13, 2003
app pub date -
Jul 23, 2002
filing date -
Aug 7, 2001
priority date (Note) -
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Abstract
An apparatus and a method for purifying the air used in cryogenic air separation are described, which are capable of effectively removing nitrogen oxides and/or hydrocarbons. The apparatus comprises an adsorber comprising an adsorption cylinder that has a first adsorbing layer and a second adsorbing layer therein. The first adsorbing layer is composed of a first adsorbent capable of selectively adsorbing water in the air. The second adsorbing layer is composed of a second adsorbent capable of selectively adsorbing nitrogen oxide and/or hydrocarbon in the air passing the first adsorbing layer, wherein the second adsorbent comprises an X zeolite containing magnesium ion as an ion-exchangeable cation.
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