发明名称 |
Method for roducing melem-free melamine and queching agents |
摘要 |
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.
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申请公布号 |
US2005131228(A1) |
申请公布日期 |
2005.06.16 |
申请号 |
US20040495619 |
申请日期 |
2004.11.04 |
申请人 |
SCHRODER FRANK;RUECH WOLFGANG;NEUMULLER CHRISTOPH;KOGLGRUBER FERDINAND;WAGNER HANS C. |
发明人 |
SCHRODER FRANK;RUECH WOLFGANG;NEUMULLER CHRISTOPH;KOGLGRUBER FERDINAND;WAGNER HANS C. |
分类号 |
C07D251/62;(IPC1-7):C07D251/62 |
主分类号 |
C07D251/62 |
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