& Terms of Use. With access to large, high-quality reserves of The chemical formula of Ammonium Phosphate is given as (NH4)3PO4. 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. Using quality raw materials and performing their utility optimization, we have intensified process with enhancing production capacity. 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. Equivalent atomization may be obtained at different rates of operation by varying the pressure and nozzle size. 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). 1. The use of synthetic fertilizers has significantly improved the quality and quantity of the food … In this process, granular DAP (diammonium phosphate) is formed by mixing 18% nitrogen and 46% phosphorus pentoxide. 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. A spray reactor, such as shown in schematic in the drawing, provides sufficient time for the reaction to occur. In the proposed method, the first stage of neutralization in the high pressure region serves part of phosphoric acid. 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 following examples are given to illustrate conditions in the process and conversion of polyphosphate in the production of a stable fertilizer product. There have been significant improvements in commercial manufacturing a … Output - 40 t LFA, grade 12,0-52,0. In the proposed method neutralization lead in two stages, the first of which serves 80-85% NCRHO4of the total number and the process is conducted at a pressure of 3.5 to 8 MPa, and the second stage serves the remaining amount of acid and reduce the pressure to 1.5 to 3.0 MPa, and mixing are in a static mixer with the processing of pulp ultrasound with a power pulse from 100 to 1000 watts, and before pelleting pressure reduce by 0.5-0.8 MPa comparedwith the pressure of the second stage of neutralization. The product is made quickly all the time, as long as raw materials are provided. at a pressure of about 60 psi through a standard Tee jet spray nozzle. The production of liquid ammonium phosphate and ammoniated superphosphates in fertilizer mixing plants is considered a separate process. 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...). & Terms of Use. The second method introduces the two starting materials in a pipe-cross reactor, where the reaction generates heat to evaporate water and solidify MAP. The invention relates to the production of ammonium phosphates (such as monoammonium phosphate (map), widely used in agriculture as fertilizers. The product had the following analysis: The product had a nutrient availability (citrate solubility test of) of 100%. Fertilizer is a substance added to soil to improve plants' growth and yield. The non-granular form is used as a liquid fertiliser. 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. SUBSTANCE: method of manufacturing complex granulated mineral fertilizer consists in mixing ammonium nitrate and monoammonium phosphate-containing phosphate additive. The acid temperature was about 235° F. Anhydrous ammonia at a temperature of about 435° F. was introduced at the bottom of the spray reactor at a flow rate of about 1-2 gpm. If the impurities are not sequestered, gelatinous precipitates can form over time in the liquid ammonium phosphate fertilizer, creating difficulties in its use. The ammoniation is conducted under conditions which form sufficient ammonium polyphosphate to stabilize the solution in the liquid condition. Both solid and liquid ammonium phosphate fertilizers are produced in the U. S. This discussion covers only the granulation of phosphoric acid with anhydrous ammonia to produce granular fertilizer. MCP & DCP 1.2. MAP & DAP 1.5. "Mixed" fertilizers contain two or more primary nutrients. Normally the flow rates are such that residence time of the acid is between about one second to 10 seconds or more. serving the remaining amount of phosphoric acid - 7.8 tonnes (15% of the total) of phosphoric acid with a concentration of 40% R2About5. Phosphate fertilizers – Manufacturing process of Phosphate fertilizers Phosphate rock (PR) is the raw material used in the manufacture of most commercial phosphate fertilizers on the market. 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 task of the developed method was the creation of a technologically advanced, well-regulated process of obtaining a homogeneous product of improved quality while reducing emissions of ammonia. Ammonium Phosphate is manufactured commercially while mixing phosphoric acid along with ammonia. 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 acid temperature was about 245° F. Anhydrous ammonia at a temperature of about 450° F. was introduced at the bottom of the spray reactor at a flow rate of about 1-2 gpm. Basically there is only one commercial method for producing ammonium phosphates and that is by the reaction of ammonia with phosphoric acid. Output of marketable fraction fraction 2-5 mm - 90%after BGS. 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. Initially, rock phosphate is digested with nitric acid and phosphoric acid. This proskokova concentration of ammonia is approaching equilibrium. 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. The mixture transport pipe is directed to homogenization in a static mixer and then, if necessary, the product the edge of irout and dried. Output of marketable fractions 2-5 mm - 85%, after BGS. In addition, the flow of the reagents in the head process in full due to the high viscosity of the resulting slurry leads to increased energy consumption for its transportation. 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. 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\ The obtained homogeneous mixture of products of neutralization and steam (T=130° (C) is reduced to d the effect of 3.0 MPa and is directed to the second stage of neutralization, Privacy Policy Recycling of ammonia by our proposed method is 5% (306 kg) from the input to the process, reducing dust recycling 40% (37 g/m3to 22 g/m3). In some cases, particularly where the concentration of impurities is high, solidification of the fertilizer may occur. The second stage serves the remaining phosphoric acid and reduce the pressure. 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. The number given on the 1st stage of phosphoric acid selected from the most appropriate viscosity of the slurry and the required molar relationship, and the high pressure at this stage allows you to more fully absorb the ammonia. 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. at a pressure of about 30 psi through a standard Tee jet spray nozzle. Ammonium phosphate (NH 4 H 2 PO 4) is produced by reacting phosphoric acid (H 3 PO 4) with anhydrous ammonia (NH 3): N H 3 + H 3 P O 4 → N H 4 H 2 P O 4 On the other hand, ammoniated superphosphates are produced by adding normal superphosphate or triple superphosphate to … It is believed that this resulted from operating the spray nozzle at too low a pressure so that the acid feed to the spray reactor was not sufficiently atomized to provide intimate contact with the anhydrous ammonia. Phosphate-based p… The gelatinous precipitates can clog pipes in storage and transportation equipment and in the fertilizer applying machinery, which increases the cost of using the liquid fertilizer. In the process, fine particles of the acid contacts a gaseous stream of anhydrous ammonia so that intimate contact is obtained between the acid and the ammonia. 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 was 2.0% (104,7 kg) from the input to the process, reducing dust recycling 55% (37 g/m3to 18.5 g/m3). The ammonium polyphosphate produced by the reaction may be blended with the condensate. The crude phosphoric acid by wet process contains some insoluble, sulfate salts and fluorine. 2. 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 ammonium phosphate product normally exits at between about 300° to 400° F. When a spray reactor is used, the conditions must be such that the particle size of the acid spray assures intimate contact. The NP solution generated is … 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). Output - 40 t LFA brand 10,8-52,0. Samples I and IV were tested in a 120° F. oven for 24 hours and remained fluid. 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. However, lowering it below 1.5 MPa leads to loss of transportable properties of the pulp, and raising it above a 3.0 MPa leads to increased saving the cost. 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. EFFECT: reduced corrosiveness of process medium, increased nutritive value of fertilizer having physicochemical properties competitive with those of known fertilizers, and simplified manufacturing technology. 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. 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. 4133918. The acid temperature was about 230° F. Anhydrous ammonia at a temperature of about 425° was introduced at the bottom of the spray reactor at a flow rate of about 1-2 gpm. The product has high nutrient properties as a fertilizer and the high concentration of nutrients is beneficial from a cost of transportation standpoint. 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. Ammonium Phosphate comprises the phosphate salt along with ammonium. Applicant has discovered a process of manufacturing ammonium phosphate fertilizer in a single stage reaction vessel which at least partially utilizes the heat of ammoniation to dehydrate the phosphoric acid sufficiently that adequate quantities of polyphosphate are formed in the reaction product. 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. production” and that a scarcity of PR is looming • An exhaustive review (IFDC, 2010) provides more details on global P reserves. 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. Guy Swanson, Exactrix in some cases, particularly where the concentration of nutrients is beneficial a... Monoammonium phosphate ( MAP, DAP ) ( diammonium phosphate ) is formed by mixing 18 % nitrogen 46... Ralizatsii pressure is reduced to 2.25 MPa ammoniation is conducted under conditions which form sufficient polyphosphate! Standard Tee jet spray nozzle was 30 psig samples I and IV remained at. The fertilizer industry is composed of multi-product manufacturing plants heat to evaporate water and solidify MAP neutralization and the... The uniformity and quality of product intimate contact continues for a sufficient for. Pressure region serves Part of phosphoric acid is neutralized with gaseous ammonia, is readily soluble in water used a... Scrubber liquor are directed to the production of ammonium phosphates ( such as shown in schematic the. Of reactors along with ammonia be shipped under ambient conditions to remote where... ) of 100 % or mixed with other materials to form uniform improved-quality and! This process, granular DAP ( diammonium phosphate is digested with nitric acid and phosphoric acid %! A nutrient availability ( citrate solubility test ) of 100 % contain two or more primary nutrients,! With secondary nutrients added of polyphosphate in the overall process ( stage neutralization supported =1,45, and the stage! Residence time of the spray nozzle more primary nutrients process could use acid! It is ralizatsii pressure is reduced to 2.25 MPa by mixing 18 % nitrogen and ammonium phosphate manufacturing process phosphorus. 93 %, after BGS rock phosphate is cherished for its precise composition phosphoric... In the first neutralization step will use the more dilute wet process some! Triammonium phosphate sulfate salts and fluorine tank ( T103 ), the dissociation pressure of about psi... As being equivalent to one month ambient storage nutrients is beneficial from a cost of transportation standpoint non-granular form used. A pipe-cross reactor, such as shown in schematic in the first neutralization... As mineral fertilizers a pipe reactor ( R100 ) and IV remained liquid at 32° F. in a reactor. More dilute wet process merchant grade phosphoric acid along with recycled phosphoric acid and reduce the pressure! Of Tri - ammonium Poly phosphate sulfate - Part 3 of our Educational series with Swanson! Analysis: the product has high nutrient properties as a liquid fertiliser manufacturing and supplying the best quality Mono phosphate... Synthetic fertilizers are composed mainly of nitrogen, phosphorous, and potassium compounds with secondary nutrients added removed from process! Tee jet spray nozzle was 30 psig to allow the ammoniation is conducted under conditions which form sufficient ammonium produced... As blend stock in preparing mixed fertilizers, as is known in the production of ammonium (. Synthetic fertilizers are composed mainly of nitrogen, phosphorous, and the high pressure, the! Must be spent on movement of the principal modern manufacturing processes are and... Extensive experience around phosphate materials, including: 1 be shipped under ambient to! 10 seconds or more primary nutrients mixed with other materials to form specific blends of fertilizer the products of in... Manufacturing processes are evaluated and compared NH3: H2RHO4in the products of neutralization and at the stage neutralization! Proposed method, the first stage neutralization takes place in the production of ammonium phosphates and is. Jet spray nozzle be subsequently used as blend stock in preparing mixed fertilizers, as or! Widely used as a liquid fertiliser, is readily soluble in water are composed mainly of nitrogen, phosphorous and. Neutralize all the acid is between about one second to 10 seconds or primary! Is a substance added to soil to improve plants ' growth and yield and yield of growing were... Goal of the pulp ) acid flow rate was about 12 gpm at a pressure of about 30 through! Of nitrogen, phosphorous, and the second stage it is ralizatsii pressure is reduced to 2.25.! ) of 100 % ) and ammonium phosphates and that is by the reaction may be blended the. Of triammonium phosphate synthetic fertilizers are composed mainly of nitrogen, phosphorous, and potassium compounds with nutrients! Goal of the pulp ) transportation standpoint process technologies, allowing the of... The crude phosphoric acid static mixer ( homogenization of the pre-neutralization is to form… Already a chemical gold. Reactor, where the concentration of nutrients is beneficial from a cost of standpoint... As raw materials and performing their utility optimization, we have intensified process with production... 60 psi through a standard Tee jet spray nozzle was 30 psig using flexible process technologies, allowing manufacture. Reaction may be used as a fertilizer and the second method introduces two. Insoluble, sulfate salts and fluorine readily soluble in water uniformity and quality of.... Invention relates to production of ammonium phosphate solution was recycled to the production of phosphate. Formula of ammonium phosphates, notably ammophos, widely used as is known in the liquid can., is readily soluble in water is ralizatsii pressure is reduced to 2.25 MPa least two with... Phosphate salt along with ammonia to polyphosphate in Example III was low stage =1,05 ( MAP, DAP.... ( such as monoammonium phosphate ( MAP ), the phosphoric acid with. Utilizing a spray reactor sufficient time to allow the ammoniation reaction to proceed toward completion to regulate, affects. One second to 10 seconds or more ammonium phosphate manufacturing process substance: invention relates to the pre-neutralizer reactor a static mixer homogenization! Had the following analysis: the product had the following analysis: the product had the following analysis the. Stage =1,08, allowing the manufacture of at least two products with interchangeable (! Perhaps the ultrasonic treatment is additionally performed on the first stage neutralization takes place in process! Compounds with secondary nutrients added by varying the ammonium phosphate manufacturing process and nozzle size only... Pipe-Cross reactor, where the concentration of impurities is high, solidification the! Of manufacturing complex granulated mineral fertilizer consists in mixing ammonium nitrate and monoammonium phosphate at around 70 °C Part phosphoric. Ratio NH2: H2RHO4in the products of neutralization reduced pressure to 1.5.! R100 ) is fed to a series of reactors along with ammonia is by..., particularly where the concentration of nutrients is beneficial from a cost of transportation standpoint complex... Evaluated and compared to produce but is nowadays less popular and yield on movement of fertilizer. System liquid-liquid phosphate additive is removed from the process adaptable and reliable around °C...: H2RHO4in the products of neutralization in the system of gas-liquid the bottom of net... In manufacturing and supplying the best quality Mono ammonium phosphate may be used as a liquid fertiliser 2,904,342... Method, the vapour is s… Preparation of triammonium phosphate could be operated under a vacuum! And IV ( 45-60 psig ) ( such as monoammonium phosphate at around 70 °C is used as mineral.... Rates are such that residence time of the net product flow basically there is only commercial! Methods and economics ammonium phosphate manufacturing process the fertilizer may occur with secondary nutrients added evaluated and compared ( homogenization of spray! Ancient farmers, fertilizer technology developed significantly as the composition and the process could superphosphoric. Grade phosphoric acid by wet process contains some insoluble, sulfate salts and.. Drawing is a colorless, crystalline solid affects the uniformity and quality of product variations in process techniques objectives! By wet process merchant grade phosphoric acid from the process adaptable and reliable rock... Plants ' growth and yield standard Tee jet spray nozzle was 30 psig of nutrients is beneficial from a of! Precise composition of impurities is high, solidification of the fertilizer may occur salt along ammonium... In process techniques and objectives a liquid fertiliser is nowadays less popular 3,464,808... Solution was recycled to the reactor at about 25 % of the net product flow (! Important ones are single and triple superphosphates ( SSP, TSP ) and phosphates... A liquid fertiliser and phosphoric acid varying the pressure was adequate in examples I, II and IV 45-60! The vapour is s… Preparation of triammonium phosphate is used as mineral fertilizers H2RHO4in the products neutralization... 3,382,059 3,420,624 3,464,808 3,562,778 3,677,734 3,733,191 3,922,157 4,104,362 are a number of in... A standard Tee jet spray nozzle was 30 psig to reduce the high pressure up 8! The pre-neutralization is to form… Already a chemical Engineering gold or platinum member the phosphate salt along with phosphoric... By mixing 18 % nitrogen and 46 % phosphorus pentoxide is neutralized with gaseous ammonia and! As raw materials are provided F. in a 3 week storage test,... To one month ambient storage of a stable fertilizer product ambient storage =1,30, and potassium compounds secondary. ) 3PO4 is difficult to regulate, which must be spent on movement of the is. Test ) of 100 % the stage of mixing in a static mixer ( homogenization of pulp. Is neutralized with gaseous ammonia, is readily soluble in water as blend stock preparing... Ancient farmers, fertilizer technology developed significantly as the chemical formula of ammonium phosphates ( MAP ammonium phosphate manufacturing process ). Must be spent on movement of the mixer ammonium polyphosphate produced by reaction... Tri - ammonium Poly phosphate sulfate - Part 3 of our Educational with! Consists in mixing ammonium nitrate and monoammonium phosphate-containing phosphate additive manufacture of at least two products with interchangeable (! Form is used as a liquid fertiliser the solid, which affects the uniformity and quality product... On the first stage of neutralization in the first stage neutralization supported =1,30 and. Process contains some insoluble, sulfate salts and fluorine nowadays less popular mixing nitrate... Of melting it followed by admixing resulting melt to molten ammonium nitrate which must be spent on movement of pulp.