发明名称 |
Apparatus for the removal of ammonium carbamate from a urea-synthesis solution |
摘要 |
An improved process and apparatus for the removal of ammonium carbamate from an aqueous urea solution wherein the aqueous urea solution is introduced into a stripping zone and caused to flow down a heat exchange wall as a thin film while being heated and contacted in counter-current relation with a gaseous stripping agent. The aqueous urea solution, while being stripped, is heated for at most 5 seconds at a temperature in the range of from 180 DEG -195 DEG C. and thereafter cooled to a temperature of from 155 DEG -170 DEG C.
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申请公布号 |
US4486270(A) |
申请公布日期 |
1984.12.04 |
申请号 |
US19810312662 |
申请日期 |
1981.10.19 |
申请人 |
UNIE VAN KUNSTMESTFABRIEKEN B.V. |
发明人 |
KAASENBROOD, PETRUS J. C. |
分类号 |
C07C273/16;C07C67/00;C07C239/00;C07C273/04;(IPC1-7):B01D3/34 |
主分类号 |
C07C273/16 |
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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