Air purification process
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United States of America Patent
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-
Nov 9, 1999
Grant Date -
N/A
app pub date -
Sep 25, 1997
filing date -
Sep 25, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Substantially all of the carbon dioxide is removed from a gas containing up to about 1% by volume carbon dioxide by subjecting the gas to a pressure swing adsorption process using as the adsorbent a single layer of zeolite having a silicon to aluminum atomic ratio in the range of 1.5 to 70. The process is particularly suitable for removing substantially all carbon dioxide and water vapor contained in air prior to subjecting the air to cryogenic distillation.
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