SU1562335A1 - Method of obtaining carbamide with zinc-containing coating - Google Patents
Method of obtaining carbamide with zinc-containing coating Download PDFInfo
- Publication number
- SU1562335A1 SU1562335A1 SU884460630A SU4460630A SU1562335A1 SU 1562335 A1 SU1562335 A1 SU 1562335A1 SU 884460630 A SU884460630 A SU 884460630A SU 4460630 A SU4460630 A SU 4460630A SU 1562335 A1 SU1562335 A1 SU 1562335A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- zinc
- urea
- carbamide
- containing coating
- nitrification
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
Изобретение относитс к области производства удобрений, в частности к получению капсулированных удобрений с микроэлементами. С целью снижени степени нитрификации при одновременном повышении агрохимической эффективности карбамида его обрабатывают цинкфосфатным шламом (продукт очистки цинксодержащих сточных вод фосфорной кислотой) в количестве 10 - 15% от массы карбамида. 1 табл.The invention relates to the production of fertilizers, in particular to the production of encapsulated fertilizers with trace elements. In order to reduce the degree of nitrification while increasing the agrochemical efficiency of urea, it is treated with zinc phosphate sludge (a product of purification of zinc containing wastewater with phosphoric acid) in an amount of 10-15% by weight of urea. 1 tab.
Description
Изобретение относитс к производству удобрений, в частности к получению капсулированных удобрений с микроэлементами .The invention relates to the production of fertilizers, in particular to the production of encapsulated fertilizers with trace elements.
Целью изобретени вл етс снижение степени нитрификации карбамида при одновременном повышении его агрохимической эффективности.The aim of the invention is to reduce the degree of nitrification of urea while increasing its agrochemical efficiency.
Пример. Берут 500 г гранулированного карбамида, помещают в аппарат псевдоожиженного сло . Температура псевдоожиженного сло минус 50 С. Пневматической форсункой на слой гранул напыл ют 140 г 40%-ной суспензии цинкфосфатного шлама.Example. Take 500 g of granulated urea, placed in a fluidized bed apparatus. The temperature of the fluidized bed is minus 50 C. A pneumatic nozzle is sprayed onto the layer of granules with 140 g of a 40% suspension of zinc phosphate sludge.
Цинкфосфатный шлам представл ет собой продукт очистки цинксодержащих сточных вод фосфорной кислотой и имеет следующее содержание основных ингредиентов, мас.%: Zn 20-23; 23-25; Fe 3,4-5,2; Na 2-4. Основным соединением шлама вл етс Zn3(PO)x х 4НаО.Zinc phosphate sludge is a product of purification of zinc-containing wastewater with phosphoric acid and has the following content of main ingredients, wt.%: Zn 20-23; 23-25; Fe 3.4-5.2; Na 2-4. The main slurry compound is Zn3 (PO) x x 4HaO.
Получают продукт с массой защитного покрыти , равной 10%. Удобрение имеет следующий состав, мас.%: N 41,4; Zn 2,0; Р705 2,1; Fe 0,3; Na 0,4.A product with a protective coating weight of 10% is obtained. The fertilizer has the following composition, wt.%: N 41,4; Zn 2.0; P705 2.1; Fe 0.3; Na 0.4.
Степень нитрификации продукта 52%.The degree of nitrification of the product is 52%.
Степень нитрификации рассчитывают по формуле:The degree of nitrification is calculated by the formula:
-- 100% ,-- 100% ,
и. кand. to
где m H k - масса нитрифицированногоwhere m H k is the mass of nitrified
карбамида;carbamide;
mц к- масса исходного карбамидае Сопоставительный анализ свойств капсулированного карбамида, полученного по предлагаемому и известному способам, приведен в таблице. 4 Как следует из таблицы, применение предлагаемого способа позволит снизить степень нитрификации карбамида на 9-15%, при этом агрохимическа эффективность карбамида повышаетСПmc to - mass of the original carbamide A comparative analysis of the properties of encapsulated carbamide obtained by the proposed and known methods is given in the table. 4 As follows from the table, the application of the proposed method will reduce the degree of nitrification of urea by 9-15%, while the agrochemical efficiency of urea increases the SP
О № ОЭ СО СПAbout No. OE SO SP
с , так как удобрение обогащаетс фосфором.c, since the fertilizer is enriched with phosphorus.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884460630A SU1562335A1 (en) | 1988-07-14 | 1988-07-14 | Method of obtaining carbamide with zinc-containing coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884460630A SU1562335A1 (en) | 1988-07-14 | 1988-07-14 | Method of obtaining carbamide with zinc-containing coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1562335A1 true SU1562335A1 (en) | 1990-05-07 |
Family
ID=21389819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU884460630A SU1562335A1 (en) | 1988-07-14 | 1988-07-14 | Method of obtaining carbamide with zinc-containing coating |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1562335A1 (en) |
-
1988
- 1988-07-14 SU SU884460630A patent/SU1562335A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Патент US № 3941578, кл. С 05 С 9/00, 1976. * |
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