发明名称 |
Process for the removal of urea, ammonia and carbon dioxide from dilute aqueous solutions. |
摘要 |
<p>Removal of urea, ammonia and carbon dioxide from diluted aqueous solutions, for instance urea process effluent, the solution being led into the top of a reaction column under a pressure of 10-30 bar, in which it flows down in counter-current to a flow of gas, for instance steam. The temperature in the top of the reaction column is 170-220 DEG C; at the bottom, it is 180-230 DEG C. Next, at a pressure of 1-5 bar, ammonia and carbon dioxide are removed from the urea-free bottom solution. The remaining solution contains less than 10 ppm urea and less than 10 ppm ammonia. </p> |
申请公布号 |
EP0053410(A1) |
申请公布日期 |
1982.06.09 |
申请号 |
EP19810201233 |
申请日期 |
1981.10.31 |
申请人 |
UNIE VAN KUNSTMESTFABRIEKEN B.V. |
发明人 |
ZUIDAM, JAN;VAN NASSAU, PETRUS JOHANNES MARIE;BRULS, PIERRE GERARD MARIE BERNARD;JONCKERS, KEES |
分类号 |
C01B31/20;B01D3/26;B01D17/00;C01C1/10;C02F1/02;C02F1/04;C02F1/58;C02F9/00;C07C67/00;C07C239/00;C07C273/04;(IPC1-7):02F1/02;02F1/04;07C126/00 |
主分类号 |
C01B31/20 |
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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