METHOD OF MANUFACTURING LIQUID NITROGEN FERTILIZER Russian patent published in 1997 - IPC

FIELD: chemical industry. SUBSTANCE: aqueous solution of ammonium nitrate and carbamide is mixed, excessive amount of ammonia is neutralized by adding nitric acid, and liquid nitrogen fertilizer is thereafter contacted with air or inert gas. Spent inert gas or air is withdrawn for the system. Nitric acid solution is added to the resulting liquid nitrogen fertilizer solution prior to mixing fertilizer components. The resulting liquid nitrogen fertilizer is throttled prior to contacting with gas. EFFECT: more efficient manufacturing method. 3 cl, 2 dwg