发明名称 |
PROCESS FOR THE PREPARATION OF UREA |
摘要 |
<p>In the present process for the preparation of urea, an off-gas stream released during the synthesis of melamine in a high-pressure melamine process which consists predominantly of ammonia and carbon dioxide, is introduced into at least one high-pressure section of a urea stripping plant and is used in the synthesis of urea. The off-gas stream can be used directly without any further treatment.</p> |
申请公布号 |
EP0923541(B1) |
申请公布日期 |
2001.05.23 |
申请号 |
EP19970937897 |
申请日期 |
1997.08.29 |
申请人 |
DSM N.V. |
发明人 |
VAN WIJCK, JULIUS, GERARDUS, THEODORUS |
分类号 |
C07C273/12;C07C275/00;C07D251/60;(IPC1-7):C07C273/12 |
主分类号 |
C07C273/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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