| 摘要 |
A process for producing urea from CO2 and NH3 in which the CO2 and NH3 are reacted in a reactor, the reaction product containing unreacted carbamate, CO2, NH3 and water is passed into a first decomposer maintained at the same pressure as the reactor, the reaction product is heated and thermally decomposed in said first decomposer to separate a major amount of carbamate from the reaction product, the remaining reaction product is passed into the upper end of a second decomposer maintained at the same pressure as the reactor and first decomposer and said remaining reaction product in said second decomposer is contacted with a stripping stream of inert gas, separating the unreacted compounds from the liquid effluent and a finished product comprising a water solution of substantially pure urea is removed from the lower end of the second decomposer.
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