METHOD OF OBTAINING NITROPHOSPHATE PRODUCTS WITH HIGH NITROGEN CONTENT Russian patent published in 2011 - IPC C05B7/00 C05G1/10 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing granular, non-oxidising and non-explosive nitrophosphate and/or nitrogen-phosphate-potassium products with high nitrogen content. The method involves obtaining a melt/suspension containing ammonium nitrate and monoammonium phosphate. The melt/suspension contains less than 2 wt % water. Before granulating the melt when producing nitrogen-phosphate fertilisers with high nitrogen content, the melt is mixed with 0.1-10 wt % water-binding agent and solid ammonium sulphate in an amount which provides overall composition of the melt where nitrogen content is greater than or equal to 25 wt % and ammonium nitrate content is less than 70 wt %. When producing nitrogen-phosphate-potassium fertilisers with high nitrogen content, the melt is mixed with 0.1-10 wt % water-binding agent, solid ammonium sulphate and at least one solid potassium salt in an amount which provides overall composition of the melt where nitrogen content is greater than or equal to 25 wt % and ammonium nitrate content is less than 70 wt %. The melt is granulated to form solid particles. The prilled particles contain 25-29 wt % nitrogen, and content of nitrate nitrogen is less than 12.2 wt %, preferably less than 11.4 wt %. Content of water-soluble phosphorus in the granules is greater than or equal 45 wt %, while that of citrate-soluble phosphorus is greater than or equal to 95 wt %.

EFFECT: invention enables to obtain nitrogen-phosphate or nitrogen-phosphate-potassium fertilisers with high nitrogen content, which are not oxidising agent and not explosive, in accordance with IMO tests.

13 cl, 1 tbl, 9 ex