Method of treatment of granular fertilizers

FIELD: chemical industry; production of fertilizers.

SUBSTANCE: the invention is pertaining to the field of chemical industry, to production of fertilizers, namely to the methods of production of granular fertilizers, and in particular, to nitrogenous and complex fertilizers, and may be used at production of the granular fertilizers with the improved properties. The method of treatment of granular fertilizers provides for application on the surfaces of the fertilizer granules (for example, carbamide, ammonium nitrate, ammonium chloride, complex NPK fertilizers), having temperature from 45 up to 100°C of the mixture of the surface-active substances with the film-forming substance in the aqueous medium. For the application may be used both ionogenic and non-ionogenic surface-active substances. The film forming substance may be chosen from the group, which contains amino-formaldehyde resins and epoxide resins, polyvinylacetate and animal glues. The technical result of the application of the additives at the heightened temperature results in the fertilizers granules strength improvement.

EFFECT: the invention ensures the fertilizers granules strength improvement.

3 cl, 36 ex, 4 tbl

 

The invention relates to the production of fertilizers, and in particular to methods for producing granulated fertilizers, in particular nitrogen and complex fertilizers, and can be used to obtain granular fertilizer with improved properties.

Fertilizers are usually obtained in the form of granules. Due to the wide use of modes of transport in bulk consumers fertilizer requirements are such properties of granular, as strength and caking of the granules. Particularly acute is the problem of providing these properties is for fertilizers, granulated by spraying the melt into a cooling gas (air) or liquid medium. This method of granulation, also known as pillromanian, widely used in industry, in particular in the production of most produced in the world of urea and ammonium nitrate (ammonium nitrate). However, the thus obtained granules have a lower strength compared to the granules obtained by granulating with agglomeration and subsequent rolling under stirring (in a fluidized bed, in rotating drums and so on).

There are many ways of processing granular fertilizers (particularly urea), which includes coating the surface of granules of various substances, mainly to prevent sleeep is of granulated product (Horlivka D.M. and other Technology urea, L.: Chemistry, 1981, s-204).

Known, in particular, ways of handling granular fertilizer comprising coating the surface of granules of long-chain aliphatic compounds at a temperature above the temperature of melting (DE 1227444, 07, 1966; US 3535376, C 07 C 127/00, 1970; EN 2121991, 05 G 3/00, 05 With 1/02, 01 J 2/28, 1998), non-ionic and/or ionogenic surface-active substances (surfactants) at ordinary or slightly elevated temperature (GB 1201817, C 07 C 127/00, 1970; SU 474128, 05 with 1/02, 1975). As a result of processing reduces the tendency of the granules to caking, but on the strength of granules such processing is not affected.

A method of processing granular fertilizer (urea)comprising the sequential coating the surface of the granules at 25-60°film-forming substance (polyvinyl alcohol) and powdered inert solid inorganic substances - bentonite (SU 937435, 05 With 9/00, 1982). Along with the decreasing tendency of the granules to caking such processing leads to an increase in the strength of the granules, apparently, thanks to the "reinforcement" of the polymer film on the surface of the granules of the solid particles.

The closest to the proposed method to the technical essence is a method of processing granular fertilizer comprising coating the surface of the fertilizer granules (CT who amide) of a mixture of surfactants (alkyl benzene - or alkanesulfonyl sodium, alkylsulfate sodium or triethanolamine, alkylphosphate potassium or sodium) and the film-forming agent (sodium carboxymethyl cellulose) in water (aqueous solution) at ordinary temperature (SU 1570255, 05 With 9/00, 1992). As a result of processing reduces the tendency of the granules to caking, and sharply reduced consumption of supplements in comparison with the use of surfactants (from 0.005 to 0.025 wt.% compared to ˜1 wt.%). Information about the effects of such processing on the strength of granules are absent.

To improve properties of fertilizer, a method for processing granular fertilizer comprising coating the surface of the fertilizer granules of a mixture of surfactants with film-forming substance in an aqueous medium, characterized in that the mixture in an amount of from 0.01 to 0.06%, calculated on the dry matter by weight of the fertilizer applied to the surface of the granules having a temperature of from 45 to 100°C.

Processing of the granules at a temperature of 45-100°With a mixture of film-forming substance and a surfactant, taken in such a small amount as 0.01-0.06% of the pellet weight, can improve the durability of the pellets by 40-60%. When the temperature of the processing unit using small quantities only film-forming substance or only surfactant leads to little significant (less than 7%) increase in the strength of the granules, so that the achieved result is a synergistic ha the actor. At temperatures less than 45°processing does not affect the strength of the granules, the processing of the granules at temperatures above 100°does not lead to further increase their strength.

For processing granular fertilizer under the proposed method can be used a variety of, in particular, industrial surfactants, both ionic, for example, alkali or (alkyl)ammonium salts alkylsulfonyl or monoalkylated (alkoxyalkyl) esters of sulfuric acid, halogenation salts of amines, salts of tetraalkylammonium, and nonionic, for example, various ethers of oligo - and polyalkyleneglycol, as well as mixtures of different surfactants, etc. as film-forming substances can be used a variety of, in particular, industrial products, for example, aminoformaldehyde resin (in particular, urea and/or melamine, epoxy resins, polyvinyl acetate (PVA), animal glue, mixtures thereof, etc.

The mixture used for the processing of the granules according to the invention, introducing a lot of processed pellets in fairly small amounts (preferably 0.01 to 0.06 wt.%), not significantly different from the amount of the mixture introduced by a known method.

The treatment according to the invention can be subjected to various fertilizers such as urea, ammonium nitrate, ammonium chloride, nitrophoska and other

The essence of the proposal is sent to the steering method is illustrated by the following examples. The compositions of the mixtures used to process the pellets are given in mass percent.

Example 1. Granules of urea (fraction size from 1.5 to 2.5 mm) in an amount of 2 kg is placed in a porcelain drum with a capacity of 20 DM3and a diameter of 25 cm, rotating at a rate of 0.5 sec-1. 2 g of a water dispersion containing 5% PVA and 20% C8-C10alkylsulfate sodium at various temperatures from 30 to 100°applied to the surface of the granules by spraying through the nozzle after the granules of the set temperature. After processing the pellets are cooled and determine the static strength of granules according to GOST 21560.2-82*. The test results of examples 1-10 are shown in table 1.

Example 2. The treatment is carried out analogously to example 1 with the difference that the processing using 2 g of a dispersion containing 20% PVA and 5% alkylsulfate sodium.

Example 3. The treatment is carried out analogously to example 1 with the difference that the processing using 2 g of a dispersion containing 12.5% of PVA and 12.5% alkylsulfate sodium.

Example 4. The treatment is carried out analogously to example 1 with the difference that the processing using 2 g of an aqueous solution containing 5% urea-formaldehyde resin (UFR) and 20% of oligoanilines (JSC), obtained from 1 mol of C7-C9alkanol and 2 mol of ethylene oxide.

Example 5. The treatment is carried out analogously to example 4 with the profile is m, that the processing using 2 g of an aqueous solution containing 20% FSC and 5% of the company.

Example 6. The treatment is carried out analogously to example 4 with the difference that the processing using 2 g of an aqueous solution containing 12.5% in FSC and 12.5% of the shares.

Example 7. The treatment is carried out analogously to example 1 with the difference that the processing using 2 g of an aqueous solution containing 5% carboxymethylcellulose (CMC) and 20% JSC obtained from 1 mol To9-C11alkanol and 3 mol of propylene oxide.

Example 8. The treatment is carried out analogously to example 7 with the difference that the processing using 2 g of an aqueous solution containing 20% CMC and 5% of the company.

Example 9. The treatment is carried out analogously to example 7 with the difference that the processing using 2 g of an aqueous solution containing 12.5% of CMC and 12.5% of the shares.

Example 10. The treatment is carried out analogously to example 1 with the difference that the processing using 2 g of a dispersion containing 4,15% PVA, CMC, FSC, alkylsulfate sodium, JSC obtained from 1 mol To7-C9alkanol and 2 mol of ethylene oxide and JSC obtained from 1 mol To9-C11alkanol and 3 mol of propylene oxide.

Example 11. Processing as in example 1 is subjected to granules of ammonium chloride, using 1 g of an aqueous solution containing 10% epoxy resin and 40% triethanolamine salt monoether sulfuric acid with JSC obtained from 1 mol of C7 -C9alkanol and 2 mol of ethylene oxide. The results of the tests in examples 11-20 are shown in table 2.

Example 12. The treatment is carried out analogously to example 11 with the difference that the processing using 1 g of an aqueous solution containing 40% epoxy resin and 10% triethanolamine salt monoether sulfuric acid with JSC.

Example 13. The treatment is carried out analogously to example 11 with the difference that the processing using 1 g of an aqueous solution containing 25% epoxy resin and 25% triethanolamine salt monoether sulfuric acid with JSC.

Example 14. The treatment is carried out analogously to example 11 with the difference that the processing using 2 g of an aqueous solution containing 7.5% of the melamine-formaldehyde resin (ISF) and 30% JSC obtained from 1 mol To7-C9alkylphenol and 2 mol of ethylene oxide.

Example 15. The treatment is carried out analogously to example 14 with the difference that the processing using 2 g of an aqueous solution containing 30% ISF and 7.5% of the company.

Example 16. The treatment is carried out analogously to example 14 with the difference that the processing using 2 g of an aqueous solution containing 18.75% ISF and of 18.75% of the shares.

Example 17. The treatment is carried out analogously to example 11 with the difference that the processing using 2 g of an aqueous solution containing 5% of joiner's (animal glue and 10% JSC obtained from 1 mol To9-C11alkylphenol and 3 mol impregnated is anoxia.

Example 18. The treatment is carried out analogously to example 17 with the difference that the processing using 2 g of an aqueous solution containing 10% wood glue and 5% of the company.

Example 19. The treatment is carried out analogously to example 17 with the difference that the processing using 2 g of an aqueous solution containing 7.5% of wood glue and 7.5% of the company.

Example 20. The treatment is carried out analogously to example 11 with the difference that the processing using 1.5 g of an aqueous solution containing 8.3% of epoxy resin, 6,25% ISF, 2.5% of joiner's glue, 8.3% of triethanolamine salt monoether sulfuric acid with JSC obtained from 1 mol of C7-C9alkanol and 2 mol of ethylene oxide, and 6.25% of the shares obtained from 1 mol of C7-C9alkylphenol and 2 mol of ethylene oxide, and 2.5% JSC obtained from 1 mol To9-C11alkylphenol and 3 mol of propylene oxide.

Example 21. Processing as in example 1 is subjected to granules of ammonium nitrate, using 2 g of an aqueous solution containing 10% FSC and 40% JSC obtained from 1 mol To12-C14alkanol, 2 mol of ethylene oxide and 1 mol of propylene oxide. The results of the tests in examples 21-26 are shown in table 3.

Example 22. The treatment is carried out analogously to example 21 with the exception that the processing using 2 g of an aqueous solution containing 40% FSC and 10% of the company.

Example 23. The treatment is carried out analogously to example 21 with the difference that for about the abode use 2 g of an aqueous solution, containing 25% FSC and 25% of the shares.

Example 24. The treatment is carried out analogously to example 21 with the exception that the processing using 2 g of an aqueous solution containing 10% ISF and 30% of polyalkylated (PJSC), obtained from 1 mol of C7-C12alkanol, 10 mol of propylene oxide and 15 moles of ethylene oxide.

Example 25. The treatment is carried out analogously to example 24 with the exception that the processing using 2 g of an aqueous solution containing 30% ISF and 10% PJSC.

Example 26. The treatment is carried out analogously to example 24 with the exception that the processing using 2 g of an aqueous solution containing 20% ISF and 20% PJSC.

Example 27. Processing as in example 1 is subjected granules nitrophoska using 2 g of an aqueous solution containing 10% FSC and 30% of the hydrochloride of octadecylamine. The results of the tests in examples 27-32 are shown in table 4.

Example 28. The treatment is carried out analogously to example 27 with the exception that the processing using 2 g of an aqueous solution containing 30% FSC and 10% hydrochloride octadecylamine.

Example 29. The treatment is carried out analogously to example 27 with the exception that the processing using 2 g of an aqueous solution containing 20% FSC and 20% hydrochloride octadecylamine.

Example 30. The treatment is carried out analogously to example 27 with the exception that the processing using 2.5 g of an aqueous solution containing 10% ISF and 40% of dodecyl bromide-trim is Ramone.

Example 31. The treatment is carried out analogously to example 27 with the exception that the processing using 2.5 g of an aqueous solution containing 40% ISF and 10% bromide dodecyl-trimethylammonium.

Example 32. The treatment is carried out analogously to example 27 with the exception that the processing using 2.5 g of an aqueous solution containing 25% of ISF and 25% bromide dodecyl-trimethylammonium.

Example 33 (comparative). Granules of urea (fraction size from 1.5 to 2.5 mm) in an amount of 2 kg is placed in a porcelain drum with a capacity of 20 DM3and a diameter of 25 cm, rotating at a rate of 0.5 sec-1and heated to a predetermined temperature, and then cooled and determine the static strength of granules according to GOST 21560.2-82*. The test results are shown in table 1.

Example 34 (comparative). Granules of ammonium chloride (fraction size from 1.5 to 2.5 mm) in an amount of 2 kg is placed in a porcelain drum with a capacity of 20 DM3and a diameter of 25 cm, rotating at a rate of 0.5 sec-1and heated to a predetermined temperature, and then cooled and determine the static strength of granules according to GOST 21560.2-82*. The test results are shown in table 2.

Example 35 (comparative). Granules of ammonium nitrate (fraction size from 1.5 to 2.5 mm) in an amount of 2 kg is placed in a porcelain drum with a capacity of 20 DM3and a diameter of 25 cm, rotating at a rate of 0.5 sec-1and heat up the backside of the Noah temperature, and then cooled and determine the static strength of granules according to GOST 21560.2-82*. The test results are shown in table 3.

Example 36 (comparative). Granules nitrophoska (fraction size from 1.5 to 2.5 mm) in an amount of 2 kg is placed in a porcelain drum with a capacity of 20 DM3and a diameter of 25 cm, rotating at a rate of 0.5 sec-1and heated to a predetermined temperature, and then cooled and determine the static strength of granules according to GOST 21560.2-82*. The test results are shown in table 4.

/tr>
Table 1

Treatment of urea granules
# exampleThe content of the additive in relation to urea (calculated on the dry matter), wt.%Static strength of granules, kg/pellet, after processing at a temperature of, °C.
3045607590100
1of 0.01250,600,640,690,720,750,75
2of 0.01250,600,650,710,760,780,77
3of 0.01250,610,650,71 0,750,770,78
4of 0.01250,600,630,690,710,750,74
5of 0.01250,590,680,810,920,960,94
6of 0.01250,600,660,750,830,870,87
7of 0.01250,600,630,670,690,710,72
8of 0.01250,590,660,720,770,790,79
9of 0.01250,600,650,700,740,770,76
10of 0.01250,600,650,730,780,800,81
3300,600,590,600,600,590,60
Table 2

Processing of granules of ammonium chloride
# exampleThe content of the additive in relation to chloride am one (calculated on the dry matter), wt.%Static strength of granules, kg/pellet, after processing at a temperature of, °C.
3045607590100
110,0250,700,750,790,820,840,84
120,0250,690,810,910,981,011,00
130,0250,700,790,860,930,960,97
140,03750,710,740,760,780,810,81
150,03750,700,780,990,960,990,98
160,03750,700,760,810,860,890,87
170,0150,710,730,760,780,810,82
180,0150,690,750,810,840,870,86
190,0150,700,740,780,800,840,84
200,02580,700,760,820,870,900,89
3400,700,700,690,700,700,70

Table 3

Processing of granules of ammonium nitrate
# exampleThe content of the additive in relation to ammonium nitrate (calculated on the dry matter), wt.%Static strength of granules, kg/pellet, after processing at a temperature of, °C.
3045607590100
210,0250,680,700,730,740,760,75
220,0250,680,750,850,910,940,94
230,0250,690,730,790,820,860,87
240,020,680,710,740,750,780,47
250,020,670,750,840,920,950,95
260,020,680,730,810,830,850,84
3500,690,680,680,680,690,68
Table 4

Processing of the granules nitrophoska
# exampleThe content of the additive in relation to nitrophoska (calculated on the dry matter), wt.%Static strength of granules, kg/pellet, after processing at a temperature of, °C.
3045607590100
260,020,820,840,880,900,910,90
270,020,830,890,981,111,251,12
280,020,820,870,94 0,981,011,01
290,020,810,840,850,850,870,86
300,020,810,880,941,101,121,11
310,020,830,860,920,960,980,97
3600,820,830,820,820,820,82

1. The method of processing granular fertilizer comprising coating the surface of the fertilizer granules of a mixture of surfactants with film-forming substance in an aqueous medium, characterized in that the mixture in an amount of from 0.01 to 0.06%, calculated on the dry matter by weight of the fertilizer applied to the surface of the granules having a temperature of from 45 to 100°C.

2. The method according to claim 1, characterized in that the film-forming substance selected from the group comprising aminoformaldehyde and epoxy resins, polyvinyl acetate and animal glues.

3. The method according to claim 1 or 2, characterized in that the fertilizer is selected from the group comprising urea, ammonium nitrate, ammonium chloride, complex NPK fertilizers.



 

Same patents:

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

FIELD: chemical industry; agriculture; methods of production of mineral fertilizers.

SUBSTANCE: the invention is pertaining to the field of chemical industry and agriculture, in particular to the methods of production of mineral fertilizers. The ammonia-lime fertilizer is produced by mixing of an ammonia nitrate fusion cake with the crushed carbonate raw containing calcium carbonate or calcium carbonate and magnesium carbonate, by granulation of the mixture, by a drying and chilling of the product. At that before mixing with the fusion cake of ammonia nitrate the crushed carbonate raw is treated with ammonium hydrosulfate with concentration of 20÷45 mass % in the ratio of the mass shares of 1:(0.01÷0.3). The crushed carbonate raw has sizes of particles from 0.8 mm up to 1.5 mm, and the granulation is conducted in the drum-type granulator at 80-90°C. In the fertilizer the shares of calcium nitrate or calcium nitrate and magnesium nitrate are decreased and the losses of ammonia nitrogen at production of fertilizer are also reduced.

EFFECT: the invention ensures reduction of the shares of calcium nitrate or calcium nitrate and magnesium nitrate and the losses of ammonia nitrogen at production of the fertilizer.

3 cl, 12 ex, 1 tbl

FIELD: agriculture, fertilizers.

SUBSTANCE: invention relates to manufacturing nitrogen-phosphorus mineral fertilizers. Method involves ammoniation reaction of wet-process phosphoric acid with the concentration 52-57 wt.-% as measured for phosphorus pentoxide and with the content of magnesium phosphates in the amount 0.6-1.9 wt.-% as measure for MgO up to preparing diammonium phosphate solution with pH value 6.6-8.0. The solution is cleared by settling up to the mass part of magnesium phosphates 0.06-0.4 wt.-% as measured for MgO and neutralized with nitric acid up to pH value 3.8-4.6 and prepared solution of monoammonium phosphate and ammonium nitrate is mixed with ammonium nitrate melt. The prepared nitrate-phosphate solution is boiled down, additional neutralization with ammonium is carried out, granulated by prilling method and treated with an anti-caking agent. Invention provides enhancing output and diminishing losses of ammonium nitrogen.

EFFECT: improved preparing method.

2 cl, 3 ex

FIELD: mineral fertilizers, chemical technology.

SUBSTANCE: invention relates to industry for producing mineral fertilizers. Method for preparing ammonium-calcium nitrate (saltpeter) involves the neutralization reaction of nitric acid with ammonia, addition of calcium nitrate, evaporation of solution and granulation of the melt. Calcium nitrate is added before the neutralization stage by dissolving calcium carbonate or oxide in nitric acid under condition providing the maintenance of the concentration of calcium nitrate solution in nitric acid in the range 5-20 wt.-% followed by neutralization of the prepared solution. Invention provides preparing the product exhibiting the high strength of granules and with reduced consumptions due to using the inexpensive calcium raw and reducing energy consumption in the evaporation stage.

EFFECT: improved preparing method.

1 dwg, 3 ex

FIELD: fertilizers.

SUBSTANCE: invention relates to producing organomineral fertilizers with using domestic sewage waters. Method involves mixing sewage waters with solution containing fulvic acids isolated from turf. Prepared suspension is heated to 40-55°C, activated in magnetic field and suspension is separated by centrifugation. Isolated solid phase is mixed with gel-like deposit containing humic acids isolated from turf and obtained product is treated with calcium hydroxide solution and subjected for aeration. Method provides enhancing quality of fertilizer due to reducing content of heavy metals in product.

EFFECT: improved method for preparing.

5 cl, 2 tbl, 1 ex

FIELD: mineral fertilizers.

SUBSTANCE: method of manufacturing complex granulated mineral fertilizer consists in mixing ammonium nitrate and monoammonium phosphate-containing phosphate additive. The latter is granulated mineral double fertilizer simultaneously containing ammonium nitrate, monoammonium phosphate, and calcium phosphates at total content of digestible phosphorus 13÷21% (calculated as P2O5). Additive is introduced by way of melting it followed by admixing resulting melt to molten ammonium nitrate. Phosphate additive utilizes nitroammophosphate at weight ratio N:P2O5 equal to 23:21 or 26:13 and phosphate additive melt is preliminarily completely or partly separated from infusible solid phase, after which phosphate additive is introduced in amount 2-6% (as P2O5) of the weight of final product. Granulated mineral fertilizer contains ammonium nitrate and monoammonium phosphate with total content of digestible P2O5 within a range of 2÷6%, in which case 0.4÷28.6% of P2O5 is present in the form of dicalcium phosphate.

EFFECT: reduced corrosiveness of process medium, increased nutritive value of fertilizer having physicochemical properties competitive with those of known fertilizers, and simplified manufacturing technology.

5 cl, 1 tbl, 5 ex

FIELD: producing mixtures of fertilizers.

SUBSTANCE: production line comprises unit for mixing the melt of nitrate with limestone, apparatus for granulating provided with devices for blowing internal space of the apparatus for granulating with atmospheric air, air operated transporting system for supplying and storing the limestone upstream of the mixing unit, and pipelines for discharging the exhaust air of the air-operated transporter. At least one pipeline for discharging exhaust air is set in the space of the granulating apparatus. At least one pipeline for discharging exhaust air is connected with the device for blowing the space of the apparatus for granulating.

EFFECT: improved environment protection.

2 cl, 2 dwg

FIELD: agriculture, in particular, mineral fertilizer utilization processes.

SUBSTANCE: method involves introducing into soil phosphate flour in an amount sufficient for obtaining of estimated yield, with phosphate flour being preliminarily mixed with carbamide and phosphogypsum; spreading resulted mixture over soil surface and embedding with the use of cultivators, disk harrows or surface plows. Method allows phosphate flour to be used as fertilizer on soil with neutral or close to neutral acidity.

EFFECT: increased efficiency in utilizing of phosphate flour on acid soil.

1 ex

The invention relates to a method of processing waste products of phosphoric acid and phosphate fertilizers in granular fertilizer
The invention relates to methods of producing nitrogen-potassium fertilizers based on ammonium nitrate and potassium salts and may find application in the chemical industry for the production of dual NK-fertilizers

FIELD: continuous-operation equipment for manufacture of mineral fertilizers; evacuation of residual gases contained in melts or hot mixtures.

SUBSTANCE: proposed device is made in form of vertical reservoir of round cross section which is provided with upper cover and branch pipes for evacuation of gases, delivery of melt or hot mixture and discharge of degassed melt of hot mixture; cylinder mounted in center of reservoir has branch pipe for delivery of melt or hot mixture; upper part of cylinder is provided with cone; disk mounted inside cylinder is rigidly connected with vibration drive through rod; it is provided with holes, 0.85 to 0.95 of diameter of cylinder which are located at distance of 0.1-0.5 of disk diameter from upper edge of cylinder.

EFFECT: enhanced efficiency; possibility of complete evacuation of gases from melt or hot mixture.

3 cl, 2 dwg

FIELD: mineral fertilizers.

SUBSTANCE: waste water intended to be utilized as fertilizer is diluted with water to content of urea peroxyhydrate 0.1-1.5% for leaf-feeding of plants and to 10-50% of urea peroxyhydrate for root nutrition of plants.

EFFECT: utilized nutritive, fungicidal, and nematocidal properties of waste waters.

5 tbl

FIELD: agriculture, in particular plant production.

SUBSTANCE: method of present invention includes utilization of urea hydroperoxide as nitrogenous fertilizer with nematocide and fungicide properties. Fertilizer of present invention also is useful in plant protection against diseases and blasts, such as potato-root eelworm and gall-root eelworm.

EFFECT: increased soil microbiological activity and fertility.

8 tbl, 8 ex

The invention relates to agriculture, namely, to products on the basis of urea, which are released during the controlled period of time, and can be used for fertilizing plants and food additives for animals

The invention relates to the field of chemistry and is used to produce fertilizers

The invention relates to methods for granular compound fertilizers based on urea with HUMATE used in agriculture
The invention relates to nitrogen fertilizer, obtained on the basis of ammonium nitrate or urea

FIELD: agriculture, fertilizers.

SUBSTANCE: invention relates to manufacturing nitrogen-phosphorus mineral fertilizers. Method involves ammoniation reaction of wet-process phosphoric acid with the concentration 52-57 wt.-% as measured for phosphorus pentoxide and with the content of magnesium phosphates in the amount 0.6-1.9 wt.-% as measure for MgO up to preparing diammonium phosphate solution with pH value 6.6-8.0. The solution is cleared by settling up to the mass part of magnesium phosphates 0.06-0.4 wt.-% as measured for MgO and neutralized with nitric acid up to pH value 3.8-4.6 and prepared solution of monoammonium phosphate and ammonium nitrate is mixed with ammonium nitrate melt. The prepared nitrate-phosphate solution is boiled down, additional neutralization with ammonium is carried out, granulated by prilling method and treated with an anti-caking agent. Invention provides enhancing output and diminishing losses of ammonium nitrogen.

EFFECT: improved preparing method.

2 cl, 3 ex

Up!