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Application

99110681/12, 1999-05-31

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Start date

1999-05-31

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Actual filing date

1999-05-31

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Published

1999-11-20

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Inventor

Abramov O.B.Dedov A.S.Drozhdin B.I.Zub V.V.Loginov N.D.Machekhin G.N.Selivanov V.N.Sezemin V.A.Utkin V.V.

(73)

Holder

Selivanov Vadim NikolaevichZub Viktor Vladimirovich

METHOD OF PREPARING COMPLEX FERTILIZERS Russian patent published in 1999 - IPC

Abstract RU 2141461 C1

FIELD: preparation of complex mineral fertilizers, more particularly, preparation of fertilizers having NPK compositions. SUBSTANCE: method comprises two stage neutralization of acid phosphorus containing solution using ammonia and carbonate, evaporation, granulation and drying of desired product. In first stage neutralization is carried out with ammonia to pH of 0.9-1.5, and in second stage, with potassium carbonate to pH of 4.5-5.5, ammonia being used in ammonia water composition. EFFECT: high-grade chlorine-free NPK fertilizer, greater efficiency of production process, reduced cost price of final product and much wider range of raw materials used. 4 cl

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RU 2 141 461 C1

Authors

Abramov O.B.

Dedov A.S.

Drozhdin B.I.

Zub V.V.

Loginov N.D.

Machekhin G.N.

Selivanov V.N.

Sezemin V.A.

Utkin V.V.

Dates

1999-11-20—Published

1999-05-31—Filed

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