Process for synthesizing urea

Details Process for synthesizing urea Process for synthesizing urea

1980-12-31

1982-01-19

Doll, John

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

55 53, 55 70, 564 68, C07C12602

Patent

active

043118569

ABSTRACT:
An inert gas containing carbon dioxide and ammonia and separated from a urea synthesis effluent under urea synthesis pressures is brought into contact with an absorbent along with unreacted carbon dioxide and ammonia separated in high pressure distillation at a pressure of from 10 to 25 kg/cm.sup.2 G to absorb substantially all of the carbon dioxide and the major portion of the ammonia, and is cooled to be separated from the resulting liquid ammonia and then is discharged. The inert gas can be treated with little or no danger of explosion by the above method.

REFERENCES:
patent: 3691729 (1972-09-01), De Rooy et al.
Zardi et al, Recycle Carbamate via Ejector, "Hydrocarbon Processing", vol. 49, (No. 4), pp. 115-116 (1970).

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