发明名称 |
Process for preparing melamine from urea |
摘要 |
Process for preparing melamine from urea at elevated temperature and in the presence of a catalyst, in which a gaseous product stream is obtained which is contacted with a liquid coolant in a cooling zone and in which a proportion of the concentrated aqueous carbamate solution from the absorption zone is returned to the cooling zone.
|
申请公布号 |
US2003050473(A1) |
申请公布日期 |
2003.03.13 |
申请号 |
US20020210877 |
申请日期 |
2002.08.02 |
申请人 |
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 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|