Process for purifying off-gases of a melamine plant
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United States of America Patent
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Dec 25, 2007
Grant Date -
Mar 17, 2005
app pub date -
Nov 14, 2002
filing date -
Nov 16, 2001
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Abstract
A two-stage process is provided for purifying off-gases from a high-pressure melamine plant. In the first stage, the off-gases are contacted with a recirculated urea melt containing melamine precursors and NH.sub.3. In the second stage, the off-gases are contacted with a fresh urea melt.
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