Urea reactor effluent solution recycle in urea synthesis

Details Urea reactor effluent solution recycle in urea synthesis Urea reactor effluent solution recycle in urea synthesis

1976-07-30

1978-05-09

Meros, Edward J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12602

Patent

active

040886840

ABSTRACT:
Urea synthesis process with liquid carbamate recycle, in which the reactor effluent is divided into major and minor streams. The major stream is reduced in pressure and subjected to heating and substantial carbamate decomposition to ammonia and carbon dioxide decomposer off gas, either directly or after preliminary ammonia separation. The minor stream is reduced in pressure and is contacted with decomposer off gas and fresh make up carbon dioxide, either directly or after preliminary ammonia separation, and in indirect heat exchange with a relatively colder fluid, whereupon ammonium carbamate is formed from the mixture of the minor stream, fresh make up CO.sub.2 and decomposer off gas in an aqueous solution of urea and the resulting solution is recycled to the urea synthesis reactor.

REFERENCES:
patent: 3470247 (1969-09-01), Guadalupi
patent: 3573173 (1971-03-01), Otsuka et al.
patent: 3579636 (1971-05-01), Mavrovic
patent: 3759992 (1973-09-01), Mavrovic
patent: 3808271 (1974-04-01), Mavrovic
patent: 3886210 (1971-05-01), Mavrovic

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