Process for preparation of urea

Details Process for preparation of urea Process for preparation of urea

1979-11-05

1980-11-04

Hearn, Brian E.

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

Organic compounds

Amino nitrogen containing

C07C12600

Patent

active

042319617

ABSTRACT:
In a urea synthesis process, the reaction product from the reaction vessel is flowed in series through high pressure, medium pressure and low pressure decomposing and stripping devices to decompose ammonium carbamate to NH.sub.3 gas, CO.sub.2 gas and water vapor, and to remove those gases and unreacted starting materials from the aqueous urea solution. CO.sub.2 gas is used as the stripping gas in the decomposing and stripping devices.

REFERENCES:
patent: 3356723 (1967-12-01), Kaasenbrood
patent: 3816528 (1974-06-01), Cook
patent: 3936500 (1976-02-01), Kaasenbrood
patent: 3944605 (1976-03-01), Inoue
patent: 4003928 (1977-01-01), Heunks
patent: 4053507 (1977-10-01), Inoue
patent: 4066693 (1978-01-01), Vendebos
patent: 4081469 (1978-03-01), Ono

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