| Original document(15 pages) 中文版 |
Process for the preparation of urea in which a urea synthesis solution containing carbamate, a portion of the carbamate is decomposed in a first decomposition stage and the gas mixture thus obtained is at least in part condensed and the condensate and the non-condensed portion of the gas mixture are returned to the synthesis zone, a further portion of the carbamate still present is decomposed in at least two further decomposition stages and the gas mixture formed is separated, and the remaining urea-containing solution is processed further. In the first decomposition stage a portion of the urea synthesis solution is subjected to a stripping treatment while heat is being supplied, and the remaining portion of the urea synthesis solution is countercurrently contacted with carbon dioxide under adiabatic conditions. The solution obtained in the treatment of the urea synthesis solution with carbon dioxide under adiabatic conditions is supplied to the first of the further decomposition stages and the stripped urea synthesis solution to the second of the further decomposition stages. |
Application Number
申请号 |
86105057 |
Application Date
申请日 |
1986.08.09 |
| Title 名称 |
Process for the prepn. of urea |
Publication Number
公开号 |
1009896 |
Publication Date
公开日 |
1987.04.01 |
| Approval Pub. Date |
|
Granted Pub. Date |
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| International Classification 分类号 |
C07C126/02 |
Applicant(s) Name
申请人 |
Stamicarbon B.V. (NL) P.O. Box 53, 6160 AB Geleen, The Netherlands |
| Address 地址 |
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| Inventor(s) Name 发明人 |
Victor Elodie Albert Baenens |
| Attorney & Agent 代理人 |
YANG GANG WANG WEI |
| More information 更 多 信 息 |
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