Plant for the production of urea in reaction spaces with differe

Details Plant for the production of urea in reaction spaces with differe Plant for the production of urea in reaction spaces with differe

1995-06-05

1996-11-12

McMahon, Timothy

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

With means applying electromagnetic wave energy or...

422187, C07C27304

Patent

active

055737340

ABSTRACT:
In a process of producing urea in which ammonia and carbon dioxide are reacted in a first reaction space (E-1, R-1) the unreacted carbamate present in the reaction mixture is subjected to a thermal decomposition treatment, so as to obtain ammonia and carbon dioxide which are sent to a second reaction space (R-2) in which they react with a solution of recycled carbamate coming from an urea recovery section (3). Advantageously, the regulation of the temperature and of the ammonia/carbon dioxide molar ratio in the second reaction space (R-2) is carried out by respectively regulating the temperature of the recycled carbamate solution and the temperature of the thermal decomposition treatment of the residual carbamate leaving the first reaction space (E-1, R-1).

REFERENCES:
patent: 3005849 (1961-10-01), Otsuka
patent: 4801745 (1989-01-01), Meessen et al.
patent: 5380943 (1995-01-01), Pagani et al.

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