LIQUID NITROGEN FERTILIZER AND A METHOD OF ITS PREPARING Russian patent published in 1995 - IPC

FIELD: mineral fertilizers. SUBSTANCE: liquid nitrogen fertilizer has carbamide, ammonium nitrate, water and stimulating addition. Humin preparations in the form of hydroxyhumate or sodium hydrohumate were used as stimulating addition at the ratio N₂/addition (280-1600):1. Prepared fertilizer has the following composition, wt.-%: carbamide 31-36; ammonium nitrate 40-44; humin preparation 0.02-0.1, and water - the rest. Method is realized by mixing of carbamide, ammonium nitrate, cooling, addition of corrosion inhibitor to mixture, growth stimulating agent in the form of humin preparation following by neutralization with gaseous ammonia up to pH 7.0-8.5. EFFECT: enhanced quality and improved method of fertilizer preparing. 3 cl, 1 dwg