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2 294 908

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(51)

IPC

C05B11/06(2006-01-01)

C05D5/00(2006-01-01)

(21) (22)

Application

2005124225/15, 2005-07-29

(24)

Start date

2005-07-29

(22)

Actual filing date

2005-07-29

(45)

Published

2007-03-10

(72)

Inventor

Abramov Oleg BorisovichBajbakov Pavel JakovlevichDedov Aleksej SergeevichZakharova Ol'Ga MikhajlovnaKiselevich Petr ViktorovichMachekhin Georgij NikolaevichMolodtsov Gennadij AlekseevichSezemin Vladimir AlekseevichShustov Vladimir Vasil'Evich

(73)

Holder

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

COMPLEX FERTILIZER Russian patent published in 2007 - IPC C05B11/06 C05D5/00

Abstract RU 2294908 C1

FIELD: mineral fertilizers.

SUBSTANCE: invention relates to technology of manufacturing complex granulated nitrogen-phosphorus-potassium fertilizers. Process comprises decomposition of apatite with nitric acid, isolation of calcium nitrate, addition of magnesium-containing additive to mother liquor after isolation of calcium nitrate, neutralization of solution with ammonia to pH 4, evaporation of neutralized solution, mixing with potassium chloride and granulation of target product. Magnesium-containing additive is selected from dolomite, magnesite, caustic magnesite and their mixture, whereas additive can be introduced in the form of magnesium nitrate solution.

EFFECT: improved user's characteristics and reduced caking.

3 cl, 1 tbl

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RU 2 294 908 C1

Authors

Abramov Oleg Borisovich

Bajbakov Pavel Jakovlevich

Dedov Aleksej Sergeevich

Zakharova Ol'Ga Mikhajlovna

Kiselevich Petr Viktorovich

Machekhin Georgij Nikolaevich

Molodtsov Gennadij Alekseevich

Sezemin Vladimir Alekseevich

Shustov Vladimir Vasil'Evich

Dates

2007-03-10—Published

2005-07-29—Filed