Apparatus for low temperature purification of gases
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United States of America Patent
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Apr 13, 1993
Issued Date -
N/A
app pub date -
Aug 15, 1991
filing date -
Jan 19, 1990
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Abstract
Apparatus for producing a substantially pure nitrogen product from a gas stream containing as impurities carbon monoxide, carbon dioxide, water vapor and hydrogen, comprising a first adsorption unit which removes water vapor and carbon dioxide from the gas stream, a catalytic reactor which oxidizes carbon monoxide and hydrogen in the gas stream leaving the first adsorption unit to carbon dioxide and water vapor, respectively, a second adsorption unit which removes water vapor and carbon dioxide from the catalytically treated gas stream, a cryogenic distillation unit which separates nitrogen from oxygen in the gas stream leaving the second adsorption unit and a conduit connecting the cryogenic distillation unit with the adsorption units for purging the adsorption units with waste gas from the cryogenic distillation unit.
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