Treatment of urea solutions

Details Treatment of urea solutions Treatment of urea solutions

1979-07-11

1981-05-26

Hearn, Brian E.

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

Organic compounds

Amino nitrogen containing

564 67, C07C12602

Patent

active

042699975

ABSTRACT:
A process and a device for treating urea solutions coming from synthesis reactors and containing in addition to the formed urea also free ammonia, water and unreacted ammonium carbammate having two steps wherein in the first step, a substantial amount of ammonia is distilled while ammonium carbammate is only partially decomposed, and in the second step, the bulk of carbammate is decomposed and the residual ammonia is distilled.

REFERENCES:
patent: 3356723 (1967-12-01), Kaasenbrood
patent: 3514484 (1970-05-01), Wentworth
patent: 3936500 (1976-02-01), Kaasenbrood et al.
patent: 3984469 (1976-10-01), Guadalupi
patent: 4036878 (1977-07-01), Kaasenbrood
patent: 4208347 (1980-06-01), Pagani

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