发明名称 |
PROCESS FOR THE PRODUCTION OF MELAMINE CRYSTALS AT HIGH PURENESS |
摘要 |
A process for producing melamine crystals at high pureness is distinguished by the fact that it comprises a crystallisation step of a flow comprising substantially pure melt melamine by cooling with liquid ammonia and a thickening step of the resulting suspension of melamine crystals in liquid ammonia by separation of a portion of the liquid ammonia present in said suspension, whereby the liquid ammonia separated in said thickening step is reused as coolant in the crystallisation step. Also disclosed is a plant for producing melamina crystals at high pureness, comprising a crystallisation section (6) and a thickening section (7).
|
申请公布号 |
WO0172722(A1) |
申请公布日期 |
2001.10.04 |
申请号 |
WO2001EP03207 |
申请日期 |
2001.03.21 |
申请人 |
CASALE CHEMICALS S.A.;PAGANI, GIORGIO |
发明人 |
PAGANI, GIORGIO |
分类号 |
C07D251/60;C07D251/62;(IPC1-7):C07D251/62 |
主分类号 |
C07D251/60 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|