Process for the production of urea

Details Process for the production of urea Process for the production of urea

1976-06-15

1979-01-30

Meros, Edward J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12602

Patent

active

041372620

ABSTRACT:
A process for producing urea from CO.sub.2 and NH.sub.3 in which the CO.sub.2 and NH.sub.3 are reacted in a reactor, the reaction product containing unreacted carbamate, CO.sub.2, NH.sub.3 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.

REFERENCES:
patent: 3120563 (1964-02-01), Bongard
patent: 3607938 (1971-09-01), Braun
patent: 3984469 (1976-10-01), Guadalupi et al.
Urea Process Technology, 1968, Powell, pp. 136-142.

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