Process and plant for the production of urea in reaction spaces

Details Process and plant for the production of urea in reaction spaces Process and plant for the production of urea in reaction spaces

1994-05-02

1996-06-04

Kumar, Shailendra

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

Organic compounds

Amino nitrogen containing

564 65, 564 66, 564 69, 564 70, 564 72, C07C27304

Patent

active

055234828

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.

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