Process for preparing urea

Details Process for preparing urea Process for preparing urea

1999-07-28

2000-08-29

Killos, Paul J.

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

Organic compounds

Amino nitrogen containing

C07L27300

Patent

active

061111384

ABSTRACT:
Process for the preparation of urea, in which the gas stream which is released during the synthesis of melamine and is composed essentially of ammonia and carbon dioxide is used to synthesize urea, in which process the gas stream which originates from a high-pressure melamine process and is composed essentially of ammonia and carbon dioxide is condensed at a pressure virtually equal to the pressure in the melamine reactor, in which process substantially anhydrous ammonium carbamate is formed, after which said ammonium carbamate is fed to a high-pressure section of a urea stripping plant.

REFERENCES:
patent: 3503970 (1970-03-01), Kanai et al.
patent: 3708536 (1973-01-01), Hillenbrand
patent: 3723430 (1973-03-01), Kokubo et al.
patent: 4433146 (1984-02-01), Beckers et al.

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