| 发明名称 |
Anhydrous molten urea prodn - by a 2-stage process |
| 摘要 |
<p>Aqueous urea solns. are concnd. to give anhydrous melts (1% H2O) by concentrating the soln. to a slurry contng. 70-98% urea (10-60% crystals), pref. at 50-120 degrees and 30-300 mm Hg. then further concentrating the slurry to give the required melt.</p> |
| 申请公布号 |
FR2099882(A5) |
申请公布日期 |
1972.03.17 |
| 申请号 |
FR19710023006 |
申请日期 |
1971.06.24 |
| 申请人 |
MITSUI TOATSU CHEMICALS;TOYO ENGINEERING CORP |
发明人 |
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| 分类号 |
C05C9/00;C07C67/00;C07C239/00;C07C273/04;C07C273/16;(IPC1-7):07C127/00 |
主分类号 |
C05C9/00 |
| 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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