Method for producing melem-free melamine and quenching agents

The invention relates to a method for producing melem-free melamine by means of aqueous processing of a melted mass of melamine which is obtained using a high-pressure method. According to the inventive method, the melted mass of melamine is quenched by means of an aqueous solution containing alkali...

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Bibliographische Detailangaben
Hauptverfasser: Schröder, Frank, Ruech, Wolfgang, Neumüller, Christoph, Koglgruber, Ferdinand, Wagner, Hans Christian
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The invention relates to a method for producing melem-free melamine by means of aqueous processing of a melted mass of melamine which is obtained using a high-pressure method. According to the inventive method, the melted mass of melamine is quenched by means of an aqueous solution containing alkalis, following the isolation of the off-gases, and is directly transferred into an aqueous alkaline melamine solution, out of which the melamine is then crystallized. The invention thus enables melamine to be obtained, with a melam content of less than 1000 ppm and a melem content of less than 50 ppm. The invention also relates to a quenching agent.