Process for preparing urea from ammonia and carbon dioxide

Details Process for preparing urea from ammonia and carbon dioxide Process for preparing urea from ammonia and carbon dioxide

1974-05-16

1976-05-18

Vertiz, Oscar R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12600

Patent

active

039578682

ABSTRACT:
An improved urea synthesis process is disclosed in which carbon dioxide and ammonia are reacted at 210.degree. to 245.degree.C under pressures of 250 to 600 atm., the gross molar NH.sub.3 /CO.sub.2 ratio in the liquid phase in the synthesis zone of the order of 2.5 and 8, the carbon dioxide and ammonia being reacted together in a synthesis zone then the resulting urea synthesis solution being stripped in a stripping zone which is in heat exchange relation with the synthesis zone through a wall, and the gas mixture resulting from the stripping is partially recycled to the synthesis zone.

REFERENCES:
patent: 3090811 (1963-05-01), Otsuka et al.
patent: 3356723 (1967-12-01), Kaasenbrood
patent: 3406201 (1968-10-01), Baumann et al.
patent: 3579636 (1971-05-01), Mavrovic
patent: 3691729 (1972-09-01), DeRoey et al.
patent: 3816528 (1974-06-01), Cook

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