METHOD OF OBTAINING COMPLEX NITROGEN-PHOSPHOROUS FERTILISER Russian patent published in 2008 - IPC C05C1/00 C05G1/00

Abstract RU 2336251 C2

FIELD: chemistry, agriculture.

SUBSTANCE: method of obtaining complex nitrogen-phosphorous fertiliser based on ammonium nitrate with addition of phosphate includes step-by-step neutralisation of nitric acid with ammonium, evaporating of neutralised solution, introduction of phosphate additive and product granulation. According to invention as phosphate additive, sediment of calcium phosphate, obtained by separation of preliminary ammonated pulp, formed in nitric-acid or hydrochloric-acid break-down of apatite concentrate, is used. Percentage of phosphates in fertiliser in terms of P₂O₅ constitutes 2-9 wt %, nitrogen - 27-32 wt %.

EFFECT: increase of fire-explosion safety of fertilizer and increase of phosphorus percentage.

2 cl, 1 tbl, 6 ex

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RU 2 336 251 C2

Authors

Genkin Mikhail Vladimirovich

Kiselevich Petr Viktorovich

Dates

2008-10-20—Published

2006-04-06—Filed