Production of ultrahigh purity nitrogen
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United States of America Patent
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-
Sep 3, 1996
Grant Date -
N/A
app pub date -
Oct 1, 1992
filing date -
Oct 1, 1992
priority date (Note) -
Expired
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Abstract
Apparatus and a process for producing nitrogen or air containing not more than 0.5 ppm by volume of carbon monoxide. A nitrogen stream or air stream containing up to about 100 ppm by volume of carbon monoxide is subjected to cryogenic temperature swing adsorption in an adsorption bed containing calcium-exchanged type X zeolite, type 5A zeolite or 13X zeolite, which removes substantially all of the carbon monoxide from the nitrogen stream or air stream.
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