Membrane process for producing carbon dioxide
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United States of America Patent
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-
Jul 11, 2000
Grant Date -
N/A
app pub date -
Apr 8, 1998
filing date -
Apr 8, 1998
priority date (Note) -
Expired
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Abstract
A process for producing carbon dioxide from a gas stream containing same pretreats the incoming raw gas to remove contaminants and particularly to protect degradation of the membranes utilized for separation. The temperatures of the various gas streams are carefully controlled to reduce water from the stream. By-product and other gas streams of the process are recycled in order to increase efficiency by utilizing the heating or cooling properties of the streams. In addition, streams containing minor portions of carbon dioxide are returned to the system for recovery.
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