Process for separating NH.sub.3 , and optionally also CO.sub.2 and H.sub.2O, from a mixture containing NH.sub.3 , CO.sub.2 and H.sub.2O
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United States of America Patent
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Aug 5, 2008
Grant Date -
Jun 1, 2006
app pub date -
Jan 9, 2004
filing date -
Jan 30, 2003
priority date (Note) -
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Abstract
The invention relates to a process for separating NH.sub.3 from a mixture containing NH.sub.3, CO.sub.2 and H.sub.2O which comprises an NH.sub.3 rectification step carried out in a NH.sub.3 separation device to which one or more streams containing NH.sub.3, CO.sub.2 and H.sub.2O including the mixture, are supplied, with a stream consisting substantially of gaseous NH.sub.3 being formed in the NH.sub.3 separation device, separated from the mixture and discharged. In the process according to the invention a condensation step is carried out on at least one of the stream consisting substantially of gaseous NH.sub.3 or the one or more streams containing NH.sub.3, CO.sub.2 and H.sub.2O supplied to the NH.sub.3 separation device, in which at least a part of the existing CO.sub.2 is converted to a liquid phase.
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