Synthesis of urea

Details Synthesis of urea Synthesis of urea

1980-11-03

1981-11-17

Doll, John

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

Organic compounds

Amino nitrogen containing

564 68, 564 70, 564 72, C07C12602, C07C12608

Patent

active

043012990

ABSTRACT:
A process for synthesizing urea in which a urea synthesis effluent obtained by reacting carbon dioxide and ammonia at urea synthesis pressures and temperatures is subjected to stripping treatment with carbon dioxide under pressures substantially equal to urea synthesis pressures to separate the unreacted carbon dioxide and ammonia contained in the urea synthesis effluent as a gaseous mixture, and a sufficient amount of said gaseous mixture to maintain the urea synthesis temperatures at a predetermined level is recycled to the urea synthesis in the gaseous state, the balance being subjected to condensation to be recycled in the liquid state to the urea synthesis.

REFERENCES:
patent: 2212847 (1940-08-01), Porter
patent: 3317601 (1967-05-01), Otsuka et al.
patent: 3876696 (1975-04-01), Guadalupi et al.

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