发明名称 |
Urea synthesis process and apparatus |
摘要 |
<p>Urea is prepared by reacting ammonia and carbon dioxide in an apparatus comprising a vertical condensation and synthesis column (1) and a stripper (21), to provide a urea synthesis solution comprising urea, unreacted ammonia, unreacted carbon dioxide and water. The urea synthesis solution is transferred from the top of the vertical condensation and synthesis column (1) to the top of a stripper (21). Carbon dioxide is introduced into the bottom of the stripper (21) and contacted with the urea synthesis solution, thereby separating the unreacted ammonia and the unreacted carbon dioxide from the urea, and providing a mixed gas comprising ammonia, carbon dioxide and water. The mixed gas is transferred into the bottom of the vertical condensation and synthesis column (1), where it is reacted with liquid ammonia injected into the bottom and a middle of the vertical condensation and synthesis column (1). The mixed gas and liquid ammonia are condensed and react to form urea. Uncondensed gases are absorbed in an absorbing medium, which is subsequently recycled to the bottom of the vertical condensation and synthesis column (1). <IMAGE></p> |
申请公布号 |
EP1170284(A2) |
申请公布日期 |
2002.01.09 |
申请号 |
EP20010116047 |
申请日期 |
2001.07.02 |
申请人 |
TOYO ENGINEERING CORPORATION;PT PUPUK SRIWIDJAJA |
发明人 |
FUKUNAKA, TADASHI;YOSHIMOTO, KENJI;SAKAI, KENJI;KOJIMA, YASUHIKO |
分类号 |
B01D5/00;B01J10/00;B01J19/00;C07B63/00;C07C273/04;C07C273/16;C07C275/00;(IPC1-7):C07C273/04 |
主分类号 |
B01D5/00 |
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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