METHOD OF PRODUCING COMPOSITION BASED ON CARBAMIDE AND AMMONIUM SULPHATE Russian patent published in 2024 - IPC C01C1/242 C05C3/00 C05C9/00 C07C273/02 B01J4/00 B01J19/24 B01J19/26 

FIELD: chemistry.

SUBSTANCE: invention relates to a method, device and use of ammonia flow at temperature of 100 °C for preparing a composition based on carbamide and ammonium sulphate. Invention relates to a method of producing a composition based on carbamide and ammonium sulphate in a tubular reactor comprising first and second mixing zone, the apparatus being said reactor. Method includes: (a) directing the liquid stream containing ammonium bisulphate into first mixing zone of the reactor; (b) directing the first ammonia stream into a first mixing zone of the reactor for reaction with the stream provided in step (a) to obtain a liquid stream containing ammonium sulphate; (c) directing the stream obtained in step (b) into second mixing zone of the reactor; and (d) directing the liquid carbamide stream into the second mixing zone of the reactor for mixing with the stream obtained in step (b) to obtain a composition based on carbamide and ammonium sulphate; wherein at step (b) the first ammonia stream directed to the first mixing zone of the reactor is preheated to 100 °C.

EFFECT: preventing crystallisation of carbamide and subsequent increase in viscosity and pressure.

14 cl, 1 dwg, 1 ex