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2 266 273

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IPC

(21) (22)

Application

2004129544/15, 2004-10-07

(24)

Start date

2004-10-07

(22)

Actual filing date

2004-10-07

(45)

Published

2005-12-20

(72)

Inventor

Abramov O.B.Garaev R.M.Dedov A.S.Zakharova O.M.Kiselevich P.V.Koshcheev V.A.Laverzhentseva I.V.Machekhin G.N.Medjantseva D.G.Mikhajlova E.G.Sezemin V.A.Shustov V.V.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Khimicheskij Kombinat Im. B.P. Konstantinova" Kchkhk)

METHOD FOR PRODUCTION OF COMPLEX WATER SOLUBLE NITROUS/PHOSPHOROUS FERTILIZER Russian patent published in 2005 - IPC

Abstract RU 2266273 C1

FIELD: complex fertilizers based on ammonium nitrate and monoammonium phosphate.

SUBSTANCE: nitric acid extract obtained by decomposition of apatite with nitric acid followed by isolation of calcium nitrate tetrahydrate is ammoniated up to pH 3.5-4.2; obtained nitroammophosphate solution is separated from precipitate and additionally ammoniated up to pH 4.5-7.0, blended with ammonium nitrate solution, boiled down and grained. Obtained fertilizer granules are treated with conditioning additives. Target product contains 3-7 mass % of P₂O₅. Method of present invention makes it possible to decrease temperature of crystallization beginning of nitroammophosphate solution purified from water insoluble impurities by 35-75°C.

EFFECT: not-caked fertilizer of improved quality and decreased fluorine impurities.

2 cl, 1 tbl, 3 ex

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RU 2 266 273 C1

Authors

Abramov O.B.

Garaev R.M.

Dedov A.S.

Zakharova O.M.

Kiselevich P.V.

Koshcheev V.A.

Laverzhentseva I.V.

Machekhin G.N.

Medjantseva D.G.

Mikhajlova E.G.

Sezemin V.A.

Shustov V.V.

Dates

2005-12-20—Published

2004-10-07—Filed