METHOD OF MODERNISING UREA PRODUCTION APPARATUS Russian patent published in 2013 - IPC C07C273/04 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of modernising a urea production apparatus (1) which employs a self-stripping process. The apparatus has high pressure loop which includes at least one synthesis reactor (5) in which ammonia (18) and carbon dioxide (15) are fed as raw material, a stripping section which includes at least thermal stripping column (7), a condensation section which includes at least one carbamate condenser (6) and medium and high pressure equipment for separating carbamate and ammonia. A feed line (18a) is also provided, through which initial carbon dioxide in amount of 20-50% of the entire stream is fed into the stripping section for use as a stripping agent. A urea synthesis apparatus and a urea synthesis method are also disclosed.

EFFECT: invention enables to modernise a urea production apparatus using a cheaper method.

12 cl, 2 dwg