METHOD OF PRODUCING CARBAMIDE
申请(专利)号： SU19853873452
专利号： SU1456009A3 主分类号： C07C126/02 申请权利人： UNI VAN
KUNSTMESTFABRIKEN B.V. (NL) 公开国代码： SU 优先权国家： NL
摘 要：
A process for the preparation of urea in which a carbamate- and free ammonia-containing urea synthesis solution is formed from carbon dioxide and excess ammonia in a synthesis zone at a
pressure of 125-350 bar, at least a portion of the carbamate present in the urea synthesis solution is decomposed in a stripping zone at the pressure of the synthesis zone or at lower pressure by heat supply and countercurrent contact with a stripping gas, the carbamate
decomposition products, together with a portion of the excess ammonia and the stripping gas, are removed from the
stripping zone as a gas mixture, at least a portion of the gas mixture obtained is condensed in a condensation zone and the stripped urea synthesis solution is processed into a urea solution or solid urea. The process is characterized in that in the condensation zone also at least 30% of the equilibrium amount of urea achievable under the reaction conditions is allowed to form and the carbamate- and urea-containing mixture is supplied to
申请日： 1985-03-15 公开公告日： 1989-01-30
分类号： C07C126/02 发明设计人： KIS JONKERS
申请国代码： SU
优先权： 19840316 NL 84
8400839
摘 要 附 图：
the synthesis zone. By preference, urea formation is continued until 50-80 %, of the way to the equilibrium has been covered. 主权项：
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METHOD OF PRODUCING CARBAMIDE
