Process for preparing urea

Details Process for preparing urea Process for preparing urea

1975-10-14

1977-07-19

Vertiz, O. R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12600

Patent

active

040368785

ABSTRACT:
Unreacted free ammonia and ammonium carbamate are removed from a urea synthesis solution efficiently by first heating the solution up to 205.degree.-250.degree. C and then, in a second, separate step, stripping the heated solution with a stripping gas but under adiabatic conditions to remove the unreacted materials. The process is applied as an integral part of a continuous urea preparation.

REFERENCES:
patent: 2848493 (1958-08-01), Dewling et al.
patent: 3317601 (1967-05-01), Otsuka et al.
patent: 3356723 (1967-12-01), Kaasenbrood
patent: 3378585 (1968-04-01), Fauser
patent: 3514484 (1970-05-01), Wentworth
patent: 3725210 (1973-04-01), Otsuka et al.
patent: 3759992 (1973-09-01), Maurovic
patent: 3876696 (1975-04-01), Guadalupi et al.
patent: 3929878 (1975-12-01), Maurovic
patent: 3936500 (1976-02-01), Kaasenbrood et al.

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