Method for purifying a melamine melt
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United States of America Patent
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May 9, 2006
Grant Date -
Jun 2, 2005
app pub date -
Dec 10, 2002
filing date -
Dec 12, 2001
priority date (Note) -
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Abstract
The invention relates to a method for producing pure melamine in a high-pressure method. According to said method, in the first stage, the melamine melt is brought into contact with hot NH.sub.3 and NH.sub.3 from the second stage and in the second step is brought into contact with cold NH.sub.3 in such a way that it is cooled to a temperature, which is 1 30.degree. C. above the pressure-dependent melting point of the melamine, before being optionally rested in a third stage and subsequently treated in various ways.
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