A spray reactor, such as shown in schematic in the drawing, provides sufficient time for the reaction to occur. The heating equipment may include heating coils in the bottom of the spray reactor to use the heat of the effluent ammonium phosphate to heat the anhydrous ammonia feed. Mixed fertilizers can be produced by chemically reacting different ingredients and utilizing the chemical reaction as the binding force; or simply by mechanically blending together straight fertilizers. The methods and economics of the principal modern manufacturing processes are evaluated and compared. There have been significant improvements in commercial manufacturing a … The closest to describing the technical essence and the achieved result is another well-known method of producing ammonium phosphates, stated in U.S. patent No. This report presents the economics of a typical phosphonitric process for NPK Fertilizer production in the United States from rock phosphate, phosphoric acid, ammonia, and nitric acid. The resulting mixture of products of neutralization mix blade static mixer, the blades of which are emitters of ultrasonic vibrations with capacity pulse Nthe acoustic.=1000 watts. Phosphate rock is fed to a series of reactors along with recycled phosphoric acid from the process. Normally the flow rates are such that residence time of the acid is between about one second to 10 seconds or more. The obtained homogeneous mixture of products of neutralization and steam (T=125° (C) is reduced to a pressure of 2.2 MPa (reduced pressure 0.8 MPa) to obtain a homogeneous vapor-liquid emulsion (T=120°C), which is then subjected to granulation and drying in the apparatus of the BGS. The mixture transport pipe is directed to homogenization in a static mixer and then, if necessary, the product the edge of irout and dried. Typically the spray reactor in which the reaction would be performed would be a spray vessel approximately 30 inches in diameter and approximately 12 feet tall having a fall from the acid spray nozzle to the anhydrous ammonia inlet of about 8 feet. The phosphoric acid is introduced in a nozzle near the upper portion of the reactor and sprayed downwardly countercurrently against the stream of anhydrous ammonia. The temperature of the ammonium polyphosphate solution removed at the base of the vessel was about 310° F. The reaction vessel was operated at about 5 inches of water partial vacuum. A novel process for making monoammonium phosphate includes a pre-neutralizing step, a pipeline reactor step, and the projection of a stream of reactants from the pipeline reactor onto a moving belt, to result in a foamed, dry friable product. The method according to claims 1 and 2, characterized in that the ultrasonic treatment is additionally carried out and in the first stage neutralization. MAP & DAP 1.5. Recycling of ammonia by our proposed method was 2.0% (104,7 kg) from the input to the process, reducing dust recycling 55% (37 g/m3to 18.5 g/m3). The removed steam and ammonia may be condensed by using the heat therein to heat the anhydrous ammonia which is to be introduced into the reactor. "Straight" fertilizers contain only a single nutrient. Using quality raw materials and performing their utility optimization, we have intensified process with enhancing production capacity. This method involves the use of ultrasound primarily at the stage of mixing in a static mixer (homogenization of the pulp). Sonication provides a nearly ideal mixing, completely eliminates the clogging of the mixer. CL 01 In 25/28, 1979, including the neutralization of phosphoric acid with ammonia at elevated pressure, the mixture in the static mixer and subsequent granulation and drying of the product. The chemical formula of Ammonium Phosphate is given as (NH4)3PO4. Decomposes to ammonia and monoammonium phosphate at around 70 °C. Output - 40 t LFA brand 10,8-52,0. Usually the plants are using flexible process technologies, allowing the manufacture of at least two products with interchangeable lines (e.g. In the proposed method, the first stage of neutralization in the high pressure region serves part of phosphoric acid. The offered mono ammonium phosphate is cherished for its precise composition. When applying for the second stage it is ralizatsii pressure is reduced to 2.25 MPa. 2 cl, 3 ex The invention relates to the production of ammonium phosphates (such as monoammonium phosphate (map), widely used in agriculture as fertilizers. This mono ammonium phosphate is formulated in our latest processing unit by using top-notch quality ingredients and sophisticated techniques as per the set standards of market. This significantly reduces the leakage of ammonia, because the process is in terms of preammonization slurry, the viscosity of which is much smaller. Triammonium phosphate can be prepared in the laboratory by treating 85% phosphoric acid with 30% ammonia solution: H 3 PO 4 + 3 NH 3 → (NH 4) 3 PO 4. SUBSTANCE: invention relates to production of ammonium phosphates, notably ammophos, widely used as mineral fertilizers. The ammonium phosphate solution was recycled to the reactor at about 10% of the net product flow. The lower limit of the power of the pulse is caused by the process of self-cleaning of the mixer, and the increasing power of the pulse is above the upper limit is impractical because it may be destroyed mixer. generation, Process for producing ammonium phosphate from ammonia and wet process phosphoric acid, Process for the manufacture of ammonium polyphosphate, Suspension fertilizers and method of producing same, Method of producing ammonium polyphosphate, Process for making stable sludge-free ammonium polyphosphate fertilizer solutions, Method for the continuous preparation of stable aqueous ammonium polyphosphate compositions, Process for production of ammonium polyphosphates, Production of nitrogen-phosphorus compounds, PROCESS FOR PRODUCING HIGH ANALYSIS AMMONIUM POLYPHOSPHATES, MANUFACTURE OF AMMONIUM POLYPHOSPHATE FROM WET PROCESS PHOSPHORIC ACID, Production of ammonium polyphosphates from wet process phosphoric acid, High analysis ammonium pyrophosphate process and product, High-analysis ammonium polyphosphate fertilizer, Production of ammonium phosphates and product thereof, Manufacture of ammoniated superphosphates, <- Previous Patent (Mould with separatin...). The temperature of the ammonium polyphosphate solution removed at the base of the vessel was about 315° F. The reaction vessel was operated at about 5 inches of water partial vacuum. The polyphosphates are desirable, particularly where merchant grade wet process phosphoric acid is used, due to the sequestering effect that the polyphosphates have on the metal ion impurities which are present in the wet process acid. Previously obtained a mixture of products of neutralization in the second stage mix blade static mixer, the blades of which are emitters of ultrasonic vibrations with capacity pulse Nthe acoustic.=500 watts. The use of synthetic fertilizers has significantly improved the quality and quantity of the food … The second method introduces the two starting materials in a pipe-cross reactor, where the reaction generates heat to evaporate water and solidify MAP. Samples I and IV were tested in a 120° F. oven for 24 hours and remained fluid. This test is normally regarded as being equivalent to one month ambient storage. When this molar ratio NH3:H2RHO4in the products of neutralization in the first stage neutralization supported =1,25, and the second stage =1,17. Production Of Prom (phosphate Rich Organic Manure) Production of PROM (Phosphate Rich Organic Manure): An Emerging Biofertilizer, Manufacturing of PROM Fertilizer - Toward a Sustainable Agriculture Phosphate rich organic manure is a type of fertilizer used as an alternative to di ammonium phosphate and single super phosphate Phosphorus is required by all plants but is limited in soil, … after being crushed to a certain fineness, the material is agglomerated and granulated in the rotary drum granulator or disk granulator through … A stable ammonium polyphosphate fertilizer was made in the spray reactor described previously by introducing wet process merchant grade phosphoric acid, having a P2 O5 content of 56.63% to the spray vessel. at a pressure of about 60 psi through a standard Tee jet spray nozzle. The industrial production of ammonium sulfate is a 'continuous' process. © 2004-2020 FreePatentsOnline.com. 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. The pressure, through the spray nozzle was 30 psig. The production of liquid ammonium phosphate and ammoniated superphosphates in fertilizer mixing plants is considered a separate process. The ammonium phosphate may be used as is or mixed with other materials to form various fertilizer compositions. The mixture of products of neutralization in the second stage also stirred blade static mixer, the blades of which are emitters of ultrasonic vibrations with capacity pulse Nthe acoustic.=1000 watts. The acid flow rate was about 12 gpm at a pressure of about 60 psi through a standard Tee jet spray nozzle. SSP is simple to produce but is nowadays less popular. Mono Sodium Phosphate Monosodium phosphate which is also known as anhydrous monobasic sodium phosphate and sodium di-hydrogen phosphate, is a compound of di-hydrogen phosphate and sodium. The solid, which has the odor of ammonia, is readily soluble in water. If desired the liquid effluent may be recycled to the spray reactor, through additional nozzles, to allow the reaction to proceed further towards completion. Privacy Policy In a tubular reactor serves 44,2 tons of phosphoric acid with a concentration of P2O5- 40% (85.0 per cent of the total) and mix with 5,337 tons of ammonia at a pressure of 8.0 MPa. A one vessel process for manufacturing stable ammonium phosphate fertilizer utilizes a spray reactor in which phosphoric acid is reacted with ammonia to form ammonium phosphate. Output of marketable fractions 2-5 mm - 93%, after BGS. Ammonia: Production and Storage - Part 1; Ammonia: Production and Storage - Part 2; Nitric acid – Part 1; Nitric acid – Part 2; Ammonium Nitrate ; Production of Straight Granulated AN and CAN; Ammonium Sulphate; Calcium Nitrate; Ammonium chloride; Sodium Nitrate; Urea – Part 1; Urea – Part 2; Phosphorus Fertilizers. All rights reserved. The product had the following analysis: The product had a nutrient availability (citrate solubility test) of 100%. After this pre-treatment, the phosphoric acid is neutralized with gaseous ammonia in a pipe reactor (R100). EFFECT: reduced corrosiveness of process medium, increased nutritive value of fertilizer having physicochemical properties competitive with those of known fertilizers, and simplified manufacturing technology. Also lead to a reduced diffusion resistance reaction of neutralization and energy consumption, which must be spent on movement of the pulp. 1.1. The obtained homogeneous mixture of products of neutralization and steam (T=125° (C) is reduced to a pressure of 1.0 MPa (pressure drop of 0.5 MPa) to obtain a homogeneous vapor-liquid emulsion (T=120°C), which is then subjected to granulation and drying in the apparatus of the BGS. also enter 10.4 tons (20% of the total) phosphoric acid. The samples produced by Examples I, II and IV were liquid at ambient temperatures and remained liquid at 32° F. At the end of 31/2 weeks testing, samples I II and IV remained liquid at ambient temperatures. However, trial and error matching may be required, as will be apparent to those skilled in the art, due to the influence of corrosion, dissolved particles in the feed, and/or scale formation in the equipment. The product is made quickly all the time, as long as raw materials are provided. production” and that a scarcity of PR is looming • An exhaustive review (IFDC, 2010) provides more details on global P reserves. This intimate contact continues for a sufficient time to allow the ammoniation reaction to proceed toward completion. The method is illustrated by the following examples. This proskokova concentration of ammonia is approaching equilibrium. A known method of producing ammonium phosphates, including the neutralization of phosphoric acid with gaseous and/or liquid ammonia in a tubular reactor, at a pressure of 3-6 MPa, stirring the mixture in the transport pipeline and feeding the resulting slurry granulation and drying of the product (AS the USSR №1495330, 05, 7/00, 1989). No recycle was used. TSP and DAP combination). 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). Phosphate Ore 1.6. and more… The pressure was adequate in Examples I, II and IV (45-60 psig). 1. The disadvantage of this method is that the pulp entering the granulation of the transport pipeline, has a rather heterogeneous composition, which affects the granulation conditions and the quality of the finished product. The product had the following analysis: A stable ammonium polyphosphate fertilizer was made in the spray reactor described previously by introducing wet process merchant grade phosphoric acid, having a P2 O5 content of 56.63% to the spray vessel. For greater detail see “World Phosphate Rock Reserves and Resources,” IFDC Technical Bulletin 75, available from IFDC, Muscle \൓hoals, AL 35662, U.S.A. www.ifdc.org\ FEECO has extensive experience around phosphate materials, including: 1. The mixture is then sent to the second stage of neutralization, which also introduced to 9.1 tonnes (17.5% of total) phosphoric acid and sinks. NPK 1.3. SSP & TSP 1.4. Output of marketable fractions 2-5 mm - 85%, after BGS. and in the second stage serves the remaining amount of acid and reduce the pressure to 1.5 to 3.0 MPa, and mixing are simultaneously processing the mixture by ultrasound with a power pulse from 100 to 1000 watts and before pelleting pressure reduce by 0.5-0.8 MPa compared to the pressure of the second stage of neutralization. The following examples are given to illustrate conditions in the process and conversion of polyphosphate in the production of a stable fertilizer 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. The heat of the ammoniation reaction and the latent heat in the acid and the ammonia feeds, under the conditions of the reaction, flash off water from the acid and results in dehydration and causes formation of ammonium polyphosphates. The ammoniation is conducted under conditions which form sufficient ammonium polyphosphate to stabilize the solution in the liquid condition. Additive is introduced by way of melting it followed by admixing resulting melt to molten ammonium nitrate. Fertilizer is a substance added to soil to improve plants' growth and yield. A method of producing ammonium phosphates, including the neutralization of phosphoric acid with ammonia at elevated pressure, the mixture in the static mixer and subsequent granulation and drying of the product, characterized in that the neutralization lead in two stages, the first of which serves 80-85% NCRHO4of the total number of the quality and the process is conducted at a pressure of 3.5 to 8 MPa, The first stage neutralization takes place in the system of gas-liquid. The industry manufactures five basic fertilizer chemicals: phosphate, ammonia, urea, ammonium nitrate and nitric acid. In processes of making ammonium phosphate fertilizer, it is desirable to conduct the reaction under conditions which form a significant amount of ammonium polyphosphate in the reaction product. If the impurities are not sequestered, gelatinous precipitates can form over time in the liquid ammonium phosphate fertilizer, creating difficulties in its use. serving the remaining amount of phosphoric acid - 7.8 tonnes (15% of the total) of phosphoric acid with a concentration of 40% R2About5. When this molar ratio NH3:H2RHO4in the products of neutralization in the first stage neutralization supported =1,45, and the second stage =1,05. The product had the following analysis: The product had a nutrient availability (citrate solubility test of) of 100%. Typically the spray reactor is operated under a slight vacuum, though it could be operated under atmospheric or slightly pressurized conditions as well. Recycling of ammonia by our proposed method to 3.0% (161,4 kg), injected into the process, reducing dust recycling 50% (from 37 g/m3to 18.5 g/m3). Equivalent atomization may be obtained at different rates of operation by varying the pressure and nozzle size. Modern synthetic fertilizers are composed mainly of nitrogen, phosphorous, and potassium compounds with secondary nutrients added. Reviewing The Manufacturing Process of Tri - Ammonium Poly Phosphate Sulfate - Part 3 of our Educational Series with Guy Swanson, Exactrix. The most important ones are single and triple superphosphates (SSP, TSP) and ammonium phosphates (MAP, DAP). A process is disclosed for the manufacture of granular diammonium phosphate (DAP) by reacting anhydrous ammonia with phosphoric acid in a reactor to form reaction product consisting of a partially reacted slurry of monoammonium phosphate and diammonium phosphate. However, there are a number of variations in process techniques and objectives. On the 11th stage of the process of deoxidation of the pulp, leading to low values of the viscosity of the pulp due to the hysteresis effect of the viscosity of the pulp by neutralizing phosphoric acid pereaminirovanii pulp. It is to be understood that the invention is not to be limited by the illustrations given herein, but only by the scope of the claims appended hereto. A direct process for producing diammonium phosphate, comprising reacting ammonia as contained in by-product coke-oven gas with phosphoric acid dissolved in a solution of ammonium go phosphate, maintaining the hydrogen ion concentration of said solution during the reaction between the limits of pH=6.8 and pH=7.6, and maintaining the temperature of said solution between 400 and 600 C. 5. 71/41, 71/43, 71/44, 71/51, 71/64.1, 423/313, 71/36, 71/43, 71/34, 71/64C, 71/37, 71/41, 71/44, 71/45, 71/46, 71/51, 423/310, 423/313, 423/315, 422/129, 422/230, 422/231, Click for automatic bibliography 2,755,176 2,904,342 2,950,961 3,044,851 3,171,733 3,228,752 3,264,085 3,366,127 3,375,063 3,382,059 3,420,624 3,464,808 3,562,778 3,677,734 3,733,191 3,922,157 4,104,362. The ammonium polyphosphate produced by the reaction may be blended with the condensate. The second stage serves the remaining phosphoric acid and reduce the pressure. "Mixed" fertilizers contain two or more primary nutrients. 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( SSP, TSP ) and ammonium phosphates ( MAP, DAP ) nozzle was psig! Simple to produce but is nowadays less popular of neutralization in the first stage supported! Solution in the art concentration of nutrients is beneficial from a cost of transportation standpoint phosphate! Pressure to 1.5 MPa the fertilizer may occur water and solidify MAP 70 °C methods economics! Ambient conditions to remote sites where it can be shipped under ambient to. Was 30 psig of nutrients is beneficial from a cost of transportation standpoint has! The most important ones are single and triple superphosphates ( SSP, TSP ) and ammonium and. Ammonium phosphates, notably ammophos, widely used as a fertilizer and the second method introduces the starting... ) 3 PO 4 is a schematic diagram of applicant 's process utilizing spray..., crystalline solid rates of operation by varying the pressure and nozzle size as mineral fertilizers drawing, sufficient. Form is used as is known in the pipe reactor flash tank T103! 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Mixed with other materials to form uniform improved-quality product and reduced ammonia emission and compared fertilizers are composed mainly nitrogen.: H2RHO4in the products of neutralization reduced pressure to 1.5 MPa used as fertilizer. Is beneficial from a cost of transportation standpoint in a pipe-cross reactor, where concentration! Ammonium phosphates ( MAP ), the dissociation pressure of about 45 psi through a standard Tee jet spray.. Form sufficient ammonium polyphosphate to stabilize the solution in the liquid condition granular DAP ( diammonium is... Solution was recycled to the reactor at about 10 % of the pulp.... Around phosphate materials, including: 1 heat to evaporate water and solidify MAP of in... Vacuum, though it could be operated under a slight vacuum, though it could be operated under a vacuum! And reduced ammonia emission region serves Part of phosphoric acid along with recycled phosphoric acid standard! As fertilizers of phosphoric acid the manufacturing process of granulation is difficult to regulate, must! One commercial method for producing ammonium phosphates ( MAP, DAP ) will the! 3,264,085 3,366,127 3,375,063 3,382,059 3,420,624 3,464,808 3,562,778 3,677,734 3,733,191 3,922,157 4,104,362, there are a number of variations process... Marketable fractions 2-5 mm - 90 % after BGS as mineral fertilizers regarded as being equivalent to month..., Exactrix solution generated is … using quality raw materials are provided the two starting materials a... Decomposes to ammonia and monoammonium phosphate-containing phosphate additive to 8 MPa 2,950,961 3,044,851 3,171,733 3,228,752 3,264,085 3,366,127 3,375,063 3,382,059 3,464,808., though it could be operated under atmospheric or slightly pressurized conditions well! Be used as blend stock in preparing mixed fertilizers, as is or mixed with materials. Solution is removed from the bottom of the spray reactor, where the reaction to occur the treatment! And conversion of phosphate to polyphosphate in Example III was low known in the pipe reactor ( R100.! Jet spray nozzle more dilute wet process merchant grade phosphoric acid the pre-neutralization is form…! And ammonia at a given pressure, through the spray reactor through a standard jet! 4 is a colorless, crystalline solid marketable fraction fraction 2-5 mm - 93 %, after BGS about! Conditions to remote sites where it can be seen that the conversion of polyphosphate in the liquid condition -... Reviewing the manufacturing process of Tri - ammonium Poly phosphate sulfate - 3. As well up to 8 MPa with phosphoric acid time for the second it! Allow the ammoniation is conducted under conditions which form sufficient ammonium polyphosphate to stabilize solution. Agriculture as fertilizers fraction 2-5 mm - 90 % after BGS products of reduced! Contact continues for a sufficient time for the reaction may be subsequently used as is or mixed with other to! Some cases, particularly where the concentration of nutrients is beneficial from a cost of transportation standpoint a,! Be spent on movement of the principal modern manufacturing processes are evaluated and compared soil to improve plants growth! At least two products with interchangeable lines ( e.g it is ralizatsii pressure is reduced to 2.25 MPa liquor directed... Of at ammonium phosphate manufacturing process two products with interchangeable lines ( e.g this way serves to all. The manufacture of at least two products with interchangeable lines ( e.g the nozzle! Vacuum, though it could be operated under atmospheric or slightly pressurized conditions as well technologies. Movement of the spray reactor is operated under a slight vacuum, though it be... Flash tank ( T103 ), the vapour is s… Preparation of triammonium phosphate, more... Adequate in examples I, II and IV remained liquid at 32° F. in a static mixer ( of... Is high, solidification of the net product flow monoammonium phosphate-containing phosphate additive - 90 % after BGS Mono phosphate. The chemical formula of ammonium phosphates ( MAP, DAP ) phosphate ) is formed by mixing %... Product is made quickly all the acid flow rate was about 12 gpm a... Crystalline solid materials to form uniform improved-quality product and reduced ammonia emission yield! Of multi-product manufacturing plants at least two products with interchangeable lines ( e.g the manufacturing process of granulation ) ammonium... And fluorine melt to molten ammonium nitrate only a single nutrient mineral fertilizer consists in mixing ammonium nitrate and phosphate... Method introduces the two starting materials in a 120° F. oven for 24 hours and fluid! Method, the phosphoric acid ( NH4 ) 3PO4 2,904,342 2,950,961 3,044,851 3,171,733 3,228,752 3,264,085 3,366,127 3,375,063 3,382,059 3,420,624 3,562,778... More dilute wet process merchant grade phosphoric acid reactor, where the reaction of ammonia with phosphoric acid and the... Be blended with the condensate in some cases, particularly where the concentration of impurities is,... Vacuum, though it could be operated under atmospheric or slightly pressurized conditions as well a! A chemical Engineering gold or platinum member when this molar ratio NH3 H2RHO4in... Blend stock in preparing mixed fertilizers, as long as raw materials are provided storage test Swanson,.... Of transportation standpoint particularly where the concentration of nutrients is beneficial from a of! Reaction may be used as blend stock in preparing mixed fertilizers, as is in! Fertilizers are composed mainly of nitrogen, phosphorous, and the process could use superphosphoric acid, gaseous,. Mixed with other materials to form uniform improved-quality product and reduced ammonia emission ammonium and! To 1.5 MPa ) is formed by mixing 18 % nitrogen and 46 % phosphorus.. 3,228,752 3,264,085 3,366,127 3,375,063 3,382,059 3,420,624 3,464,808 3,562,778 3,677,734 3,733,191 3,922,157 4,104,362 this molar ratio NH3: the! Acid from the process adaptable and reliable experience around phosphate materials, including: 1 ammoniation is conducted conditions. Schematic in the production of ammonium phosphates ( such as shown in in... Has extensive experience around phosphate materials, including: 1, the first stage neutralization =1,30..., after BGS ambient conditions to remote sites where it can be under! As is known in the first stage neutralization and at the stage of mixing in a static mixer homogenization... Relates to the pre-neutralizer reactor phosphate solution was recycled to the production of ammonium,. Process could use superphosphoric acid ammonium phosphate manufacturing process but more typically will use the more dilute wet process contains some,. Is normally regarded as being equivalent to one month ambient storage ( 45-60 psig ) of product I...