Process for the synthesis of urea from carbon dioxide and ammoni

Details Process for the synthesis of urea from carbon dioxide and ammoni Process for the synthesis of urea from carbon dioxide and ammoni

1976-07-30

1977-12-06

Meros, Edward J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12602

Patent

active

040616754

ABSTRACT:
Urea is produced from ammonia synthesis effluent containing hydrogen, nitrogen, methane and argon, which is reacted with carbon dioxide to form ammonium carbamate. The hot ammonia synthesis effluent is contacted with the liquid effluents from the area synthesis reactor to dissociate the carbamate contained in said effluents into a gaseous effluent containing ammonia, carbon dioxide and oxygen, and to produce a further liquid reaction product containing urea. Oxygen is removed from the carbamate dissociation effluent, which is then fed to the ammonia synthesis step.

REFERENCES:
patent: 3046307 (1962-07-01), Bochinski
patent: 3069234 (1962-12-01), Cook et al.
patent: 3674847 (1972-07-01), Kaasenbrood et al.
Powell, "Urea Process Technology," (1968) pp. 136-138.

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