A method of producing ammonium phosphates |
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IPC classes for russian patent A method of producing ammonium phosphates (RU 2201394):
A method of obtaining map / 2200722
The invention relates to a method of obtaining map
 A method of obtaining compound fertilizer / 2200139
The invention relates to methods for complex fertilizers, in particular nitrogen-phosphorus-potassium fertilizers containing nitrogen and potassium in water-soluble and lemon-soluble forms
 The method of obtaining complex nitrogen-phosphorus fertilizers / 2171795
The invention relates to a method for producing a complex granulated mineral fertilizers based on ammonium nitrate and phosphoric acid
The method of obtaining complex nitrogen-phosphorus fertilizer / 2169720
The invention relates to methods for complex granulated nitrogen-phosphorus fertilizers based on ammonium nitrate and phosphorus-containing components
A method of obtaining a transparent liquid complex fertilizers / 2167133
The invention relates to the production of liquid complex fertilizers
The method of producing diammonium phosphate / 2164506
The invention relates to a method of producing diammonium phosphate, are widely used as fertilizers for different types of soils
 The method of obtaining monokaliy / 2164494
The invention relates to a method for monokaliy used as fertilizer, food additives, as well as in medicine and Microbiology
The method of producing diammonium phosphate / 2157355
The invention relates to a method of producing diammonium phosphate, are widely used as fertilizers for different types of soils
 The method of obtaining complex fertilizers / 2157354
The invention relates to the production of complex phosphorus fertilisers on the basis of wet-process phosphoric acid and can be used for the production of fertilisers containing two or more nutrients - phosphorus, potassium, magnesium
 For vysokoorientirovannogo ammonium polyphosphate / 2180891
The invention relates to the production of vysokoorientirovannogo ammonium polyphosphate (APF), used as flame retardant in the composition of the intumescent fire retardant coatings and in the manufacture of fire-resistant structural materials
 The method of obtaining vysokoorientirovannogo ammonium polyphosphate / 2180890
The invention relates to the production of vysokoorientirovannogo ammonium polyphosphate used as a flame retardant in the composition of the intumescent fire retardant coatings and in the manufacture of fire-resistant structural materials
 A method of obtaining a granulated fertilizer / 2034817
The invention relates to a method for producing granulated fertilizers based on ammonium phosphates, which are widely used in agriculture
 Device for producing solutions of ammonification / 2022919
The invention relates to equipment for the production of solutions of ammonification from wet-process phosphoric acid
 The method of controlling the production of solutions of mono - and diammoniumphosphate / 2006460
The invention relates to the field of production control solutions of mono - and diammoniumphosphate, in particular liquid complex fertilizers (HCS) brand 8-24-0, and can be used as a rapid control over the content of nitrogen and phosphorus oxide (V) in the product
Ammonium phosphate production process / 2255041
Invention relates to production of ammonium phosphates, notably ammophos, widely used as mineral fertilizers. Process involves neutralization of phosphoric acid with ammonia at elevated pressure, stirring of resulting mixture in static mixer, and subsequent granulation and drying of product. According to invention, neutralization is carried out in two steps: in the first step, 80-85% H3PO4 of its total amount is added and process is carried out at gauge pressure 3.5-8 atm and, in the second step, the rest of acid is added and pressure is lowered to pressure 1.5-3.0 atm. Stirring is effected simultaneously with ultrasonic treatment of the mixture with pulse power from 100 to 1000 W and, before granulation, pressure is lowered by 0.5-0.8 atm relative to pressure of the second neutralization step. Ultrasonic treatment can likewise be employed in the first neutralization step.
Method for preparing monoammonium phosphate / 2259941
Invention relates to a method for preparing monoammonium phosphate used broadly as a mineral fertilizer. Method involves decomposition of phosphate with a mixture of phosphoric and sulfuric acid, separation of reaction mass with isolation of the production acid, its purifying from impurities, concentrating, ammoniation to obtain phosphate pulp and the following procedures of granulation and drying. The separated production acid is concentrated and then subjected for purification from impurities and ammoniated maintaining the content of P2O5 in the concentrated acid at these stages in the range 52-56%, the content of SO3 at the range 1.5-3.2%, the residual content of solid impurities in the cleared concentrated acid 0.2-0.6% by mass, and the mole ratio NH3 : H3PO4 in the range 1.01-1.16. Regulation of the yield for required sort of monoammonium phosphate by the content of main nutrient substances and the ratio is carried out by change of the SO3 content in dilute phosphoric acid and by change of the mole ratio NH3 : H3PO4 in the ammoniation process. Invention provides enhancing content of total sum of nutrient substances in the fertilizer and enhancing strength index of granules and their homogeneity.
Method of production of diammonium phosphate / 2261221
The invention is pertaining to production of ammonium phosphates, in particular, diammonium phosphate widely used in agriculture as mineral fertilizers. The method includes neutralization of phosphoric acid by ammonia at an increased pressure, a stirring action of the produced mixture in a static mixer with its subsequent granulation and drying of the product. Neutralization is conducted in two stages: on the first of which feed 8 - 85 % of ammonia from total amount and the process is conducted under the pressure of 3.5 - 8.0 atm, and on the second stage feed the remained amount of ammonia and reduce pressure to 1.5 - 3.0 atm. At that the stirring action is carried on simultaneously with a treatment of the mixture with ultrasound with a pulse power from 100 up to 1000 W. Before granulation additionally reduce the pressure by 0.5 - 0.8 atm as compared with the pressure of the second stage of neutralization. Ultrasonic treatment additionally conduct and on the first stage of neutralization. The technical result is production of a homogenous product of improved quality, decreased power inputs and losses of ammonia in the general process.
Method of purification of solution of ammonium orthophosphates from tarry matters at trapping ammonia from the coke oven gas / 2276680
The invention is pertaining to the field of a by-product coke industry, in particular, to trapping of ammonia from coke oven gas by a circular phosphate method, namely, to purification of the ammonium orthophosphates solution from the tarry matters. The method of purification of the ammonium orthophosphates solution from the tarry matters provides for feeding of the solution into the apparatus, separation of the tarry matters, their removal from the upper part of the apparatuses, and removal of the purified solution from the lower part of the apparatus. Separation of the tarry matters conduct using the mounted in the apparatus nozzle made out of the coke established in the vehicle from the coke particles with the size of less than 10 mm in amount of 70-80 % from total amount at the linear speed of the solution through its section of 0.001-0.0014 m\s. The invention allows to exclude the possibility of settling of the tarry matters particles on the bottom of the apparatus and regeneration of the nozzle, to increase productivity and reliability of the process.
Method of production of ammonium of hydroorthophosphate / 2284292
The invention is pertaining to production of ammonium of hydroorthophosphate used in the food-processing industry for production of the baker's yeast, as the source of nitrogen and phosphorus, and in production of the ethyl alcohol-rectificate. The method of production of ammonium of hydroorthophosphate includes the two-stage neutralization of the phosphoric acid by ammonia, the evaporation of the solution produced after the first stage of the neutralization, the process of crystallization of the solution of the product with the subsequent separation of the commercial product from the mother liquor by centrifuging. At that the neutralization at the first stage conduct up to pH 5.1-6.0, then the produced solution before the evaporation is mixed with the mother liquor in the ratio of 1 : (1-1.5) up to the density of 1.28-1.33 g/cm3. The method ensures the increased output of the product.
 Method of the ammonium phosphate cleaning / 2289544
The invention is pertaining to the methods of the ammonium phosphates cleaning for the purpose of production of the pure and the high-clean products having the wide application in many industries, such as chemical, alimentary, pharmaceutical industries, etc. The method includes the stage by stage ammonium phosphates recrystallization from the saturated water solution. At the first stage they introduce the preliminary cleaned monoammophos containing of no more than 1.5 % of SO4, and each stage of the recrystallization is realized in two steps, on the first of which they conduct evaporation of the solution at the temperature of 100-105°C within 1-2 hours and the active stirring action with the rate of 5-7 turns/second up to the achievement of the ratio of L:S = 1:1, and at the second step lead the chilling of the solution up to the temperature of 20-25 °C within 3-4 hours at the slow stirring action with the rate of 1-3 turns/second up to the achievement of the ratio of L:S = 1:1.776. The technical result of the invention consists in the increased output and the degree of the product purity, reduction of the production process duration.
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(57) Abstract: The invention relates to methods for production of ammonium phosphates, are widely used as fertilizers. The method includes neutralizing a mixture containing neoprene phosphoric acid, ammonia in two stages, oparka and subsequent granulation, drying of the product and the cleaning of exhaust gases, with the first stage of neutralization serves 20-60% neoprenes phosphoric acid from the total number (P2ABOUT5and ammonization lead to the content of 1.8 to 3.4% ammonium silicofluoride, obtained partly ammoniaand phosphoric acid evaporated to a moisture content of 10-30%, and then before the second stage of neutralization is mixed with the rest neoprenes phosphoric acid in the first stage neutralization maintain the pH of 0.7 to 1.2, and the second depending on the received fertilizer or pH 4.0 to 4.5 or pH of 6.5 to 7.0. The method allows us to simplify stage flue gas cleaning, virtually eliminate emissions of fluoride to reduce incrustation and corrosion of equipment. 1 C.p. f-crystals. The invention relates to methods for production of ammonium phosphates, are widely used as fertilizers. The known method of production is the tion, drying of the product and the cleaning of exhaust gases. The concentration of phosphoric acid is 47%, i.e. pre-oparka acid (phosphate and complex fertilizers./ Ed. by S. D. of Eventica and A. A. Brodsky. - M.: Chemistry, 1987, S. 191-192). The closest to describing the technical essence and the achieved result is another well-known method of producing ammonium phosphates (DAP), including the neutralization of a mixture containing neoprene phosphoric acid, ammonia in two stages, oparka and subsequent granulation, drying the product and clean exhaust gases. According to this method are oparka part of phosphoric acid, then mixed it with neoprenes phosphoric acid in amounts determined by the ratio F: P2O5in a mixture of equal to 0,03-0,05. Concentration neoprenes acid is 36%, and the concentration of the mixture is 40-46%. A mixture containing neoprene and one stripped off the acid is fed to the two-stage neutralization with ammonia first to molar relationships NH3: H3RHO4= 1,4, and then to 1.75. Molar relationships are defined on the basis of obtaining the required final product. The drawback of both methods is the same temperatures decomposes with evolution of HF and SiF4. This leads to significant emissions of exhaust gases containing fluorine, and the need for utilization of his or sodium silicofluoride, or by neutralization with lime milk. Both these solutions cause significant operational difficulties, as the demand for sodium silicofluoride is limited, and the clearance of fluoride of lime milk will require the installation of several tanks (RF patent 2152374, 05, 7/00, 2000). The task is to create a method of producing ammonium phosphates, which would have led to the almost complete absence of carbon fluoride, simplification stage flue gas cleaning, reducing incrustation and corrosion of the equipment and, consequently, to improve the technological process. The problem is solved in the method of producing ammonium phosphates, including the neutralization of ammonia mixtures containing neoprene phosphoric acid in two stages, oparka and subsequent granulation, drying of the product and the cleaning of exhaust gases, in which the first stage of neutralization serves 20-60% neoprenes phosphoric acid (P2O5) from its total, ammonition it to the content of 1.8 to 3.4% ammonium silicofluoride (obsreved to a moisture content of 10-30% and before the second stage of neutralization is mixed with the rest neoprenes acid. It is advisable in the first stage neutralization to maintain a pH of 0.7 to 1.2, and the second depending on the received fertilizer pH 4.0 to 4.5 for monoammonium phosphate, pH 6,5-7,0 - for diammonium phosphate. The method consists in the following. Part neoprenes phosphoric acid - 20-60% of the total amount of P2O5served on the first stage of neutralization, which lead to content in partially ammoniaand acid 1,8-3,4% ammonium silicofluoride, which goes H2SiF6contained in the acid. This ammonization lead up to the regulated amount of ammonium silicofluoride. By reducing the content of ammonium silicofluoride in a partially ammoniaand acid results in the release of fluorine in the process of parki, and with increasing content of silicofluoride ammonium - ammonia losses from the condensate. Conditions ammonization (in particular, the quantity supplied to ammonization ammonia) depend on the type of raw material, the content of fluorides, concentration neoprenes acid, which varies from 25 to 39% R2O5. After the second stage of neutralization of soluble silicofluoride ammonium transformed into an insoluble fluoride feces is personal salt bridges, comprising fluorine, which have a positive impact on the strength of the resulting pellets fertilizer. The number neoprenes acid supplied to the preliminary neutralization, for industrial schemes selected, on the one hand, taking into account the maximum possible energy savings on oparka (not more than 60% of the total number neoprenes acid), and on the other hand (not less than 20%), in compliance with a certain moisture content of the pulp entering the granulation and drying, which is determined to be used for this equipment. Oparka slurry to a moisture content of 10-30% due to the receipt of the pulp with good rheological properties coming onto the granulation and drying. This allows to reduce the energy consumption at the stage of granulation and drying. It is advisable in the first stage neutralization to maintain a pH of 0.7 to 1.2, and the second - depending on the received product or pH 4.0-4.5 (map) or pH 6.5-7.0 (diammonium phosphate). These values due to the final characteristics of the products required by state standards. The use of the proposed method will allow you to get as monoammonium phosphate and diammonium phosphate, applying part neoprenes phosphoric acid of different concentrations of znachitelno stage after granulation and drying. All of the above allows you to make high-tech, use of existing equipment in existing plants to reduce energy consumption, reduce incrustation and corrosion of the equipment and significantly increase the turnaround time of the equipment. The method is illustrated by the following examples. Example 1. 55 t/h neoprenes phosphoric acid containing 25% R2O5divided into two streams: 11 t/h and 44 t/h (20% and 80% of the total, respectively). Stream number 11 t/h is neutralized with ammonia and the process is conducted at a pH of 1.2 to content in partially ammoniaand acid ammonium silicofluoride and 3.4%. Then, the resulting partially ammoniaand acid is evaporated in an evaporation apparatus to a moisture content of 10% and mixed with the rest neoprenes acid. The resulting mixture was fed into the high-speed ammoniator-evaporator (AIS), which is fed into the ammonia. the pH is maintained at 4.5. Obtained after neutralization of the slurry fed to the granulation and drying in a drum granulator-dryer (BGS), where the granules are dried until the moisture content of 1.3%. The exhaust gases after the apparatus SAI and BGS come on absorption. The gases that have passed clean, contain F-traces.2ABOUT5divided into two streams: 19,7 t/h and 30.9 t/h (38,9% and 61.1% from the total, respectively). The flow amount of 19.7 t/h is neutralized with ammonia and the process is conducted at a pH of 1.0 to content in partially ammoniaand acid ammonium silicofluoride is 2.4%. Then, the resulting partially ammoniaand acid is evaporated in an evaporation apparatus to a moisture content of 16% and mixed with the rest neoprenes acid. The resulting mixture was fed into the high-speed ammoniator-evaporator (AIS), which is fed into the ammonia. the pH is maintained at the level of 4.2. Obtained after neutralization of the slurry fed to the granulation and drying in a drum granulator-dryer (BGS), where the granules are dried until the moisture content of 0.8%. The exhaust gases after the apparatus SAI and BGS come on absorption. The gases that have passed clean, contain F-traces. The result 26,4 t/h of finished product composition: P2ABOUT5- 52,1%, N - 12,1%. Example 3. Used for production of 10 t/h neoprenes phosphoric acid content of 36% R2ABOUT5and 20 t/h neoprenes phosphoric acid content of P2ABOUT527%. The flow number 20 t/h neoprenes phosphoric acid stromatolites ammonium 1,8%, the pH is maintained at the level of 0.7. The obtained partially ammoniaand acid evaporated to moisture 10% and mixed with 10 t/h neoprenes phosphoric acid content of 36% R2ABOUT5. The resulting mixture is fed into a tubular reactor, which is neutralized at pH 6.8. The resulting slurry is fed into the dryer-granulator-dryer (BGS), where the granulation and drying of the product to moisture and 1.0%. After classification receive a 19.6 t/h of finished product composition: 46,0% R2ABOUT5and 18,0% N. Flue gases BGS come for treatment. The gases that have passed clean, contain traces of fluorine. 1. A method of producing ammonium phosphates, including the neutralization of a mixture containing neoprene phosphoric acid, ammonia in two stages, oparka and subsequent granulation, drying of the product and the cleaning of exhaust gases, characterized in that the first stage neutralization serves 20-60% neoprenes phosphoric acid from its total and ammonization lead to the content of 1.8 to 3.4% ammonium silicofluoride, obtained partly ammoniaand phosphoric acid evaporated to a moisture content of 10-30%, and then before the second stage of neutralization is mixed with the rest neoprenes phosphoric acid. 2. The method according to p. 1, otlichayushiesya - or pH 4-4,5, or pH of 6.5 to 7.0.
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