发明名称 PROCESS FOR PREPARING UREA
摘要 Process for the preparation of urea, in which the gas stream which is released during the synthesis of melamine and is composed essentially of ammonia and carbon dioxide is used to synthesize urea, in which process the gas stream which originates from a high-pressure melamine process and is composed essentially of ammonia and carbon dioxide is condensed at a pressure virtually equal to the pressure in the melamine reactor, in which process substantially anhydrous ammonium carbamate is formed, after which said ammonium carbamate is fed to a high-pressure section of a urea stripping plant.
申请公布号 WO9832731(A1) 申请公布日期 1998.07.30
申请号 WO1998NL00036 申请日期 1998.01.20
申请人 DSM N.V.;VAN WIJCK, JULIUS, GERARDUS, THEODORUS;MEESSEN, JOZEF, HUBERT 发明人 VAN WIJCK, JULIUS, GERARDUS, THEODORUS;MEESSEN, JOZEF, HUBERT
分类号 C07C273/12;(IPC1-7):C07C273/12 主分类号 C07C273/12
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