发明名称 PROCESS FOR THE PREPARATION OF MELAMINE FROM UREA
摘要 Process for the preparation of melamine from urea by reacting urea or thermal decomposition products thereof at elevated temperature in the presence of a catalyst, with process condensate being discharged from the process and characterized in that a proportion of the concentrated aqueous carbamate solution from the absorption zone is returned to the cooling zone or in that the temperature in the cooling zone is lowered to 100-150 DEG C.
申请公布号 WO0214289(A1) 申请公布日期 2002.02.21
申请号 WO2001NL00481 申请日期 2001.06.27
申请人 DSM N.V.;DE WIT, NORA, ANNA;GULPERS, ROB, KASIMIER 发明人 DE WIT, NORA, ANNA;GULPERS, ROB, KASIMIER
分类号 C07D251/60;(IPC1-7):C07D251/60 主分类号 C07D251/60
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