Phosphor-potassium-nitrogen-containing npk-fertiliser and method of producing granulated phosphor-potassium-nitrogen-containing npk-fertilisers

FIELD: chemistry.

SUBSTANCE: complex nitrogen-phosphate-potassium fertiliser (NPK) contains ammonium nitrate, anhydrous calcium sulfate, potassium dihydrogen phosphate. Mass fraction of total nitrogen from 13-15%, mass fraction of total phosphates in terms of P2O5 from 9-10%, the mass fraction of potassium in terms of K2O from 13-15%. The method of producing a complex NPK-fertiliser from a solid phosphate salt, which is a mixture of the fluorapatite Ca5(PO4)3F and dicalcium phosphate CaHPO4nH2O, where n is from 0 to 2, and the content of fluorapatite Ca5(PO4)3<F from 27 to 99% includes: a step of decomposing the said solid phosphate salt with a sulfuric acid by a semi-dry method, a step of adding potassium sulfate as a source of potassium, ammonium nitrate as a source of nitrogen, a step of preparing the slink NPK, and granulating and drying step of the finished product.

EFFECT: improving the properties of NPK-fertiliser, increasing the strength of granules, solving the problem associated with the plasticity of granular complex fertilisers, increasing the water solubility of phosphorus contained in the fertiliser, and improving the consumer properties of NPK-fertilisers.

12 cl, 1 dwg, 3 tbl, 3 ex

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to agriculture. Peat-zeolite fertiliser with prolonged effect, modified with potassium iodide, includes valley peat and natural zeolite, modified with potassium iodide KI, in ratio 2.3:1-3.4:2, with natural zeolite, milled to grain size 0.5-0.7 mm, being saturated from 0.02-0.04% potassium iodide solution for 14-16 h with ratio of weight of natural zeolite and potassium iodide solution 1:7-1:13.

EFFECT: invention makes it possible to increase bioproductivity of poor soils and productivity of crops.

3 ex

FIELD: chemistry.

SUBSTANCE: method of producing compound fertiliser includes neutralising a mixture containing P2O5 and CaSO4, granulating and drying the end product, wherein the ratio of P2O5 and CaSO4 with respect to CaO is equal to 1:(0.25-0.65), respectively; the mixture is fed for neutralisation in an amount which provides sulphur content in the end product of 3-8%; neutralisation is carried out with calcium carbonate to pH 2.8-3.1, and nitrogen- and potassium-containing components are added during the process.

EFFECT: invention widens the range of fertilisers which contain not only nitrogen, phosphorus and potassium, but also vital elements such as sulphur and calcium, and enables to use the fertiliser on any soil and for various types of crops.

6 cl, 6 ex

FIELD: agriculture.

SUBSTANCE: preparation for land reclamation, contaminated with arsenic, contains a mixture of humic acids, modified with 5% solution of lime milk, in a ratio of mixture of humic acids to 5% solution of lime milk as 6:4-8:2. The preparation formula for land reclamation, contaminated with arsenic, contains organic components and water, and it additionally contains lime, and as the organic component it comprises a mixture of humic acids of the preparation "Humate 80" with a chemical composition based on the dry wt %: water-soluble sodium and potassium humates - 87%, other water-soluble compounds - 6.3%, insoluble residue - 6.7%.

EFFECT: inventions enable to improve significantly the fertility of soils contaminated with arsenic, with simultaneous reduction of their toxicity by providing binding of arsenic in its both metallic and non-metallic forms into hardly soluble compounds.

2 cl, 2 dwg, 1 tbl

FIELD: agriculture.

SUBSTANCE: method of production of complex fertiliser comprises neutralising the phosphoric acid and nitric acid with ammonia, followed by mixing with potassium chloride, final ammoniation and granulation in the granulator-ammonisator, and drying the finished product, and neutralisation with ammonia is carried out by mixtures of nitric and phosphoric acids, when added the pulp of magnesium-containing compounds in phosphoric acid, and the ratio of H3PO4:HNO3:MgO is maintained as 1:(0.5-6):(0.025-0.055), and neutralisation is carried out to obtain the pulp with the molar ratio of NH3 to H3PO4, equal to 1.3-1.5, and humidity of 6-8%.

EFFECT: invention enables to create a technology of production of complex wide range fertilisers, with improved physical and chemical properties.

2 cl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to agriculture. A compound microfertiliser comprising boric acid, ammonium molybdate and potassium or sodium metasilicate, further includes, as an organic component which acts as a complexing agent, fullerenol obtained by direct catalytic oxidation of C60 fullerene with an alkali, having the formula C60(OH)n1On2, where n1+n2=12-34, as well as calcium nitrate quadhydrate, potassium nitrate, potassium chloride, mono-substituted potassium phosphate, magnesium sulphate heptahydrate. All components are taken in a defined ratio. The method of producing the compound microfertiliser includes preparing a working solution by dissolving and mixing in tap water inorganic salts of macroelements and trace elements in the following sequence: calcium nitrate quadhydrate, potassium nitrate, potassium chloride, mono-substituted potassium phosphate, magnesium sulphate heptahydrate, potassium or sodium metasilicate, boric acid, ammonium molybdate to obtain a solution of macroelements and trace elements and adding aqueous fullerenol solution of the formula C60(OH)n1On2, where n1+n2=12-34, wherein pH of the working solution is 5.5-6.0.

EFFECT: invention enables to produce a compound water-soluble microfertiliser with growth-stimulating, phytoprotection and adaptogenic properties.

2 cl, 13 tbl

FIELD: agriculture.

SUBSTANCE: method of production of compound nitrogen-phosphorus fertiliser comprises neutralising with ammonia of nitric acid with addition of phosphoric acid, and the solution of nitric acid and phosphorous are fed to the autoclave and then oxygen at a pressure of 0.5-0.6 MPa, and the resulting solution is neutralised with ammonia and sulphate aluminium is added.

EFFECT: invention enables to improve the economic efficiency of the process of production of compound nitrogen-phosphorus fertiliser.

1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to agriculture. A method of producing compositions of highly concentrated liquid compound fertilisers is based on obtaining experimental data and constructing an (n+1)-corner diagram, the vertices of which correspond to fertiliser components (n) and water, wherein selection of components and optimisation of compositions is carried out based on the obtained experimental data on phase equilibria in multicomponent systems containing starting components: inorganic salts, inorganic acids, carbamide and water, constructing phase diagrams, setting the ratio of nutrients N, P2O5 and K2O and determining the ratio and maximum concentration of components in the liquid compound fertiliser from the diagrams.

EFFECT: invention enables to determine the optimum composition of a liquid compound fertiliser based on given ratios N:P2O5:K2O or determine the maximum possible concentration of components of a liquid compound fertiliser, while maintaining stability of the composition during storage.

6 dwg, 1 tbl, 3 ex

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agriculture. The method comprises foliar treatment with microfertiliser in the tillering phase to increase yield in a dose of 2.0 kg/ha per 250 litres of water. The treatment is carried out on the background of feeding with N40P30K20 and early spring feeding with ammonium nitrate - N40. To improve the quality of grains the single foliar treatment is carried out in a phase of tillering in a dose not exceeding 1.0 kg/ha. The microfertiliser is used as complex microfertiliser containing succinic and citric acid, potassium hydroxide, lithium chloride, boric acid, salts of trace elements in the form of sulfates or chlorides, or nitrates of manganese, zinc, cobalt, copper in the following ratio, wt %: succinic acid 8-10, citric acid 15-17, potassium hydroxide 17-18, boric acid, 5.5-5.7, lithium chloride 0.19-0.21, water - the rest, at that the sulfates or chlorides, or nitrates of manganese, zinc, cobalt and copper are taken in the recount in the final product based on manganese 1.5-1.7, zinc 1.2-1.4, cobalt 0.2-0.4 and copper 0.5-0.7.

EFFECT: method enables to increase the yield and quality of winter wheat food grain.

1 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to agriculture. The silicon-containing compound fertiliser contains a silicon component in form of ash of rice plant residues - husks, containing 88-99% silicon oxide SiO2, nitrogen, potassium, phosphorus and minor nutrients in the following ratios in wt %, respectively: 0.20-0.44; 0.90-2.80; 0.12-0.60 and 0.05-5.0; the minor nutrients are zinc, manganese, iron, calcium, magnesium, titanium and aluminium salts.

EFFECT: invention enables to obtain an organomineral fertiliser with high content of an organic silicon component, which ensures high degree of phosphorus assimilation by plants, ensures considerably high yield of the fertilised crops, reduces the environmental load on the soil and natural water.

FIELD: chemistry.

SUBSTANCE: invention relates to agriculture. Concentrated liquid mineral composition, containing the following components is applied for spraying leaves: total ammonia nitrogen (%) 0.08-2%, potassium, expressed as K2O (%) 3-6%, magnesium, expressed as MgO (%) 0.4-0.8%, sodium, expressed as Na2O (%) 1-2%, calcium, expressed as CaO (%) 0-0.5%, total phosphates, expressed as SO3 (%) 3-6%, total phosphorus, expressed as P2O5 (%) 0%, chlorides Cl (%) 1-2%, bicarbonates (in % HCO3) 1.2-3.0%, boron (%) 0.1-0.2%, copper (%) 0.018-0.03%, manganese (%) 0.00005-0.006%, iodine (%) 0.02-0.04%, zinc (%) 0.00005-0.006%, iron 0.0002-0.003, water to 100%. Percent content is expressed in weight percent relative to the total composition weight.

EFFECT: invention makes it possible to improve adaptive response of plants to change of the environmental conditions.

9 cl, 5 dwg, 1 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: method includes perforating half of strips of a synthetic film; folding in two and using said strips to cover strips of the surface of an irrigated area; feeding irrigation water under the film; spreading ammonium nitrate on the perforated parts of the strips of the of the synthetic film; depositing binder on the layer of ammonium nitrate; folding the strips of the synthetic film in two; using said strips to cover the surface of the irrigated area and feeding irrigation water under the film.

EFFECT: broader functional capabilities of the method by feeding ammonium nitrate into the soil during irrigation.

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. The method of producing ammonium nitrate-sulphate involves preparing solid ammonium sulphate and a mixture containing ammonium nitrate, ammonium sulphate and water, wherein the ratio of ammonium sulphate to ammonium nitrate is less than 0.5. Curing of the product containing an ammonium nitrate-sulphate double salt in ratio of 1:2 from the solid ammonium sulphate and the mixture is carried out while cooling at least part of the mixture at a rate of less than about 100C/min. The amount of water in the mixture during curing is at least 0.5 wt % per total weight of ammonium nitrate, ammonium sulphate and water in the mixture.

EFFECT: invention enables to obtain a composition which contains ammonium nitrate double salts with low detonation capacity.

10 cl, 6 dwg, 2 tbl

FIELD: chemistry.

SUBSTANCE: method of producing granular ammonium nitrate involves adding a stabilising additive to an obtained ammonium nitrate solution while simultaneously neutralising the obtained solution with ammonia, evaporating the obtained solution until a melt forms, granulating the melt, wherein to increase absorption capacity of granular ammonium nitrate, granules are treated with a stabilising emulsion, the continuous phase of which is diesel fuel and the dispersed phase is water, with a variable ratio of the water phase to the oil phase of 1:(1.5-9).

EFFECT: invention enables to obtain granular ammonium nitrate with high static strength, low caking capacity and residual moisture content, high absorption and retention capacity without using blowing agents.

1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to agriculture. The method of producing non-caking ammonium nitrate, which involves adding a magnesia additive obtained by decomposing magnesium-containing material with nitric acid to molten ammonium nitrate, followed by neutralisation of the mixture with ammonia, evaporation and granulation, wherein sludge from ultra-filtration equipment for production of desalinated water is added to the melt along with the magnesia additive in amount of 0.04-0.4 kg/t ammonium nitrate.

EFFECT: invention enables to obtain a product of high quality.

4 cl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to agriculture. The method of producing liquid compound fertiliser, which involves mixing ammonium nitrate solution with a carbonic acid derivative, the ammonium nitrate used being an 80% solution of ammonium nitrate before the evaporation step, and the carbonic acid used being magnesium carbonate, wherein components are mixed in ratio of 1:0.525 while stirring continuously at temperature not higher than 55C, and pH of the solution is brought to 7.

EFFECT: invention increases nutrient value and reduces the cost of producing ammonium nitrate-based fertiliser.

5 cl, 5 ex

FIELD: chemistry.

SUBSTANCE: according to the first version of the invention, stage II distillation carbon-ammonia salts (byproduct of carbamide production) are removed from recycling to obtain carbamide, for which pumps are stopped and at pressure of 2 kgf/cm2 after the levelling vessel, carbon-ammonia salts are fed into a collecting tank, wherein in order to use carbon-ammonia salts as ready liquid fertiliser or a component of liquid compound fertiliser, the salts are pumped by a pump into railway tanks for shipping, and in order to process carbon-ammonia salts into crystalline powder, the carbon-ammonia salts are first carbonised at pH 7, after which they are fed into a mixer-crystalliser and dried while mixing continuously. According to the second version of the invention, a condensate of juice vapour (carbamide production waste) is mixed with sulphuric acid and phosphoric acid at temperature not lower than 100C and weight ratio of components of 1:0.152:0.152, respectively, and pH of the solution is brought to 7.

EFFECT: obtaining an additional commercial product in form of nitrogen fertiliser.

4 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: granular fertiliser containing water-soluble forms of nitrogen, magnesium and sulphur contains 18-24 wt % nitrogen, 8-12 wt % sulphur, 3-6% magnesium, expressed as magnesium oxide MgO, in form of boussingaultite - (NH4)2SO4MgSO46H2O, and double salts of ammonium nitrate - 2NH4NO3(NH4)2SO4 and 3NH4NO3(NH4)2SO4. Magnesite is treated with concentrated nitric acid containing 30-60% HNO3 to form a reaction mixture containing magnesium nitrate, calcium nitrate and other nitrates according to content of metal compounds in magnesite, and a residue - undecomposed magnesite. The reaction mixture is neutralised with an alkaline reagent to pH 2-6, left to allow reaction with ammonium sulphate at temperature 80-120C for 20-80 minutes to form a suspension of boussingaultite - (NH4)2SO4MgSO46H2O, containing 10-30 wt % water. The suspension is mixed with a recycled product of the previous production in ratio 1:2-1:4 and granulated to form a moist granulate, from which the end product is obtained after removing free water.

EFFECT: obtaining fertiliser which is suitable for growing plants on soils with low content of water-soluble magnesium and for plants which require fast delivery of nutrients.

16 cl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry and agriculture. Carbon dioxide-containing gas reacts with a base to form a carbonate. The base is selected from a group comprising calcium oxide, calcium hydroxide, a stream containing calcium oxide, a stream containing calcium hydroxide and a combination thereof. The obtained product reacts with a reactant selected from a group comprising nitric acid, phosphoric acid, a salt thereof and a mixture thereof, to form CO2 and an intermediate product. At least a portion of the CO2 is separated from the intermediate product and a condensed and relatively concentrated stream is formed therefrom. The intermediate product reacts with ammonia to form fertiliser selected from a group comprising ammonium nitrate, ammonium phosphate or a combination thereof. At least a portion of the base forming said intermediate product is regenerated. At least a portion of said fertiliser is separated from the mixture formed at the previous step.

EFFECT: method is ecologically clean and enables combined production of fertiliser and a CO2 stream with low power consumption.

8 cl, 6 dwg, 8 ex

FIELD: chemistry.

SUBSTANCE: method involves producing organomineral fertiliser based on organic and mineral components through mixture thereof. The organic component used is wood-plant material crushed to 2-10 mm fractions. The mineral component used is 98-99% aqueous solution of ammonium nitrate or carbamide. The ratio of the organic component to the mineral component is equal to 1-3:1. The components are mixed at pressure 4-5 atm and temperature 180-190C.

EFFECT: invention increases soil fertility by increasing the amount of humus in the soil.

2 tbl, 1 ex

FIELD: construction.

SUBSTANCE: method includes mixing solutions of ammonium nitrate and sulfate at the ratio that provides for the specified content of sulfate sulphur in a fertiliser, introduction of a modifying additive, steaming of the mixed solution at the finished temperature of the produced suspension that does not exceed 155C, granulation of suspension. The suspension prior to granulation is soaked during mixing for at least 30 minutes and steamed at the finished temperature of 186-198C. Granulation is carried out by prilling method.

EFFECT: invention makes it possible to produce a fertiliser that does not become caked when stored even without treatment of granules with amino-oil mix.

4 cl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to obtaining ammonium phosphates from phosphorus-containing solutions. Method of obtaining includes the following stages: supply of enriched with phosphorus liquid phase, which does not mix with water (210); addition of water-free ammonia into liquid phase enriched with phosphorus (212); precipitation of monoammonium phosphate and/or diammonium phosphate from said liquid phase (214); regulation of liquid phase temperature in the course of said stages of addition and precipitation in preliminarily specified interval of temperatures (216); removal of precipitated monoammonium phosphate and/or diammonium phosphate from said liquid phase (218); washing crystals of removed precipitated monoammonium phosphates and/or diammonium phosphates (220) and drying washed crystals (228). Method also includes stages: separation of residual liquid phase, washed from said crystals (222); re-use of said separated residual liquid phase for further absorption of phosphorus to be reused in the following removal (230), and re-use of used washing liquid (226), poor in said residual liquid phase for the following washing of said crystals. Stage of washing (220) includes washing with saturated water solution of ammonium phosphate, and the stage of separation of residual liquid phase (222) includes phase separation of said liquid phase and said saturated water solution of ammonium phosphate. Invention also relates to installation for obtaining ammonium phosphates.

EFFECT: completely soluble ammonium phosphates without necessity to concentrate phosphoric acid by water evaporation.

20 cl, 5 dwg, 2 tbl, 10 ex

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