Liquid nitrogen-potash fertilizer

C - Chemistry – Metallurgy – 05 – G

Patent

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Details

C05G 1/00 (2006.01) C05C 1/00 (2006.01) C05C 13/00 (2006.01) C05D 1/00 (2006.01) C05G 3/00 (2006.01)

Patent

CA 2464915

The invention relates to the production of liquid nitrogen-potash fertilisers and can be used for chemical industry and agriculture. The inventive fertiliser comprises a nitrogen-containing component, a potassium-containing component and water. The nitrogen-containing component contains ammonium nitrate, carbamide and ammonium hydroxide, the potassium-containing component containing potassium chloride and potassium carbonate at the following component ratio: 22-30 mass % of NH4NO3, (NH2 )2 CO, and NH4OH in terms of N, 3-20 mass % of KCl and/or K2CO3 in terms of K2O3, the rest being H2O. The ammonium nitrate content in said component is selected within a range between 40 % and 59.5 %. The carbamide content is selected within a range between 30 % and 5 %, the rest being ammonium hydroxide. The potassium chloride in the potassium-containing component is selected within a range between 0.5 % and 26.5 %, the rest being potassium carbonate. The thus produced inventive fertiliser contains a large number of well-assimilated by plants nitrogen forms (ammonia (NH4), nitrate (NO3) and amide (NH2) forms) and a low chlorinity.

L'invention concerne la production d'engrais liquides a base d'azote et de potassium, et peut être utilisée dans l'industrie chimique et l'agriculture. L'engrais selon l'invention comprend un composant azoté, un composant contenant du potassium et de l'eau. Le composant azoté comprend du nitrate d'ammonium, du carbamide et de l'hydroxyde d'ammonium. Le composant contenant du potassium comprend du chlorure de potassium et du carbonate de potassium, selon le rapport suivant exprimé en pourcentage en poids: 22/30 en équivalent N dans NH¿4?NO¿3?, (NH¿2?)¿2?CO et NH¿4?OH; 3/20 en équivalent K¿2?O dans KCl et/ou K¿2?CO¿3?; le reste étant constitué par H¿2?O. La teneur en nitrate d'ammonium dudit composant est choisie entre 40 et 59,5 %. La teneur en carbamide est choisie entre 30 et 39,5 %, l'hydroxyde d'ammonium constituant le reste. La teneur en chlorure de potassium du composant contenant du potassium est choisie entre 0,5 et 26,5 %, le reste étant constitué par le carbonate de potassium. L'engrais ainsi produit contient plusieurs formes d'azote, notamment les formes les mieux assimilées par les plantes, telles que les formes ammonium (NH¿4?), nitrate (NO¿3?) et amide (NH¿2?). Cet engrais présente également une teneur en chlore réduite.

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