The ammonium phosphate solution was recycled to the reactor at about 10% of the net product flow. One method of granulation involves putting the solid materials into a … 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 … The production of liquid ammonium phosphate and ammoniated superphosphates in fertilizer mixing plants is considered a separate process. production” and that a scarcity of PR is looming • An exhaustive review (IFDC, 2010) provides more details on global P reserves. The product had the following analysis: It can be seen that the conversion of phosphate to polyphosphate in Example III was low. No recycle was used. Before pelleting pressure reduce that provides a more uniform distribution of the slurry on the particle reture and, of course, leads to an increase in yield of marketable fraction regulated by a specific size of the granules, as well as to reduce returnest process. also enter 10.4 tons (20% of the total) phosphoric acid. 4133918. Initially, phosphoric acid, gaseous ammonia, and scrubber liquor are directed to the pre-neutralizer reactor. 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. 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. 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. 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. 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. 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. Preparation of triammonium phosphate. However, there are a number of variations in process techniques and objectives. It will be appreciated by those skilled in the art that by choosing a feed pressure and nozzle size for the acid spray this can be accomplished. The temperature of the ammonium polyphosphate solution removed at the base of the vessel was about 300° F. The reaction vessel was operated at about 5 inches of water partial vacuum. Using quality raw materials and performing their utility optimization, we have intensified process with enhancing production capacity. The first stage neutralization takes place in the system of gas-liquid. after being crushed to a certain fineness, the material is agglomerated and granulated in the rotary drum granulator or disk granulator through … Output - 40 t LFA, brand 11,1-52,0. This significantly reduces the leakage of ammonia, because the process is in terms of preammonization slurry, the viscosity of which is much smaller. at a pressure of about 60 psi through a standard Tee jet spray nozzle. 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. The ammonia feed may be further heated by in-line heat exchangers or other conventional equipment to bring it up to the desired temperature for reaction. When applying for the second stage it is ralizatsii pressure is reduced to 2.25 MPa. Normally the flow rates are such that residence time of the acid is between about one second to 10 seconds or more. The disadvantage of this method is its adaptability to manufacture due to frequent driving equipment at the stage of mixing the pulp (homogenization). 2 cl, 3 ex The invention relates to the production of ammonium phosphates (such as monoammonium phosphate (map), widely used in agriculture as fertilizers. The process description shows a production process for diammonium phosphate [/caption] Ammoniation-granulation. Decomposes to ammonia and monoammonium phosphate at around 70 °C. 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. The ammonium phosphate solution is removed from the bottom of the spray reactor. 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). 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. Phosphate rock is fed to a series of reactors along with recycled phosphoric acid from the process. The obtained homogeneous mixture of products of neutralization and steam (T=125° (C) is reduced to a pressure of 1.55 MPa (reduced pressure 0.7 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. 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. However, the particle size must be large enough so that the acid falls to the bottom of the reactor and is not unduly entrained in the exhaust gases. 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. serving the remaining amount of phosphoric acid - 7.8 tonnes (15% of the total) of phosphoric acid with a concentration of 40% R2About5. In a common method, a one-to-one ratio of ammonia (NH₃) and phosphoric acid (H₃PO₄) is reacted and the resulting slurry of MAP is solidified in a granulator. The liquid may be stored and transported without substantial solidification or crystalization so that the product may be subsequently used as an ammonium phosphate fertilizer. This mechanism allows to reduce the high pressure, since the process is in the system liquid-liquid. 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 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). 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. Short video of Bifox Phosphate production process in Caldera Chile, May 2019. The drawing is a schematic diagram of applicant's process utilizing a spray reactor. Typically the spray reactor is operated under a slight vacuum, though it could be operated under atmospheric or slightly pressurized conditions as well. At 155 °C, … 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. Samples I, II and IV remained liquid at 32° F. in a 3 week storage test. This proskokova concentration of ammonia is approaching equilibrium. Sonication provides a nearly ideal mixing, completely eliminates the clogging of the mixer. The product had the following analysis: The product had a nutrient availability (citrate solubility test of) of 100%. The acid flow rate was about 12 gpm at a pressure of about 60 psi through a standard Tee jet spray nozzle. No recycle was used. NPK 1.3. 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 product has high nutrient properties as a fertilizer and the high concentration of nutrients is beneficial from a cost of transportation standpoint. Privacy Policy 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. If desired the liquid effluent may be recycled to the spray reactor, through additional nozzles, to allow the reaction to proceed further towards completion. When this molar ratio NH2:H2RHO4in the products of neutralization in the first stage neutralization supported =1,30, and the second stage =1,08. Output of marketable fraction fraction 2-5 mm - 90%after BGS. When applying for the second stage of neutralization reduced pressure to 1.5 MPa. According to the diammonium phosphate MSDS from CF Industries, Inc., decomposition starts as low as 70 °C: "Hazardous Decomposition Products: Gradually loses ammonia when exposed to air at room temperature. 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. curriculum-key-fact Output - 40 t LFA brand 10,8-52,0. All the process parameters can significantly reduce ammonia losses in the overall process (stage neutralization and at the stage of granulation). "Straight" fertilizers contain only a single nutrient. 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. 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. The offered mono ammonium phosphate is cherished for its precise composition. The use of synthetic fertilizers has significantly improved the quality and quantity of the food … The methods and economics of the principal modern manufacturing processes are evaluated and compared. The mixture transport pipe is directed to homogenization in a static mixer and then, if necessary, the product the edge of irout and dried. 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. The process of granulation is difficult to regulate, which affects the uniformity and quality of product. To produce fertilizer in the most usable form, each of the different compounds, ammonium nitrate, potassium chloride, ammonium phosphate, and triple superphosphate are granulated and blended together. 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. After this pre-treatment, the phosphoric acid is neutralized with gaseous ammonia in a pipe reactor (R100). The industry manufactures five basic fertilizer chemicals: phosphate, ammonia, urea, ammonium nitrate and nitric acid. EFFECT: reduced corrosiveness of process medium, increased nutritive value of fertilizer having physicochemical properties competitive with those of known fertilizers, and simplified manufacturing technology. The method is illustrated by the following examples. Output - 40 t LFA, grade 12,0-52,0. Applicant's process contacts phosphoric acid with anhydrous ammonia under conditions in which the phosphoric acid is partially dehydrated and reacted to form an ammonium phosphate containing sufficient ammonium polyphosphates that the reaction product is self-seqesting and stable. FEECO has extensive experience around phosphate materials, including: 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. Normally the conversion of phosphate to polyphosphate is sufficiently high to provide a stable liquid product, normally in the range of 20% or greater conversion to polyphosphate. 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 problem is solved in the proposed 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. 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. 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. 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. SUBSTANCE: method of manufacturing complex granulated mineral fertilizer consists in mixing ammonium nitrate and monoammonium phosphate-containing phosphate additive. SUBSTANCE: invention relates to production of ammonium phosphates, notably ammophos, widely used as mineral fertilizers. 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 Chemical reaction take place in the diammonium phosphate fertilizer manufacturing pre-neutraliser •NH3+H3PO4 → NH4H2PO4 (Mono ammonium phosphate) •NH4H2PO4 + NH3 → (NH4)2HPO4 (Diammonium phosphate) 6. 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. In this process, granular DAP (diammonium phosphate) is formed by mixing 18% nitrogen and 46% phosphorus pentoxide. 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, 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, … 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...). We are instrumental in manufacturing and supplying the best quality Mono Ammonium Phosphate. The acid flow rate was about 10.5 gpm. 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. SSP & TSP 1.4. The pressure, through the spray nozzle was 30 psig. Typically the temperatures of the ammonia feed would be between about 400° F.-600° F. and the temperature of the acid is between ambient up to boiling. In the proposed method, the first stage of neutralization in the high pressure region serves part of phosphoric acid. 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. This intimate contact continues for a sufficient time to allow the ammoniation reaction to proceed toward completion. The second method introduces the two starting materials in a pipe-cross reactor, where the reaction generates heat to evaporate water and solidify MAP. Ultrasonic treatment can likewise be employed in the first neutralization step. This test is normally regarded as being equivalent to one month ambient storage. 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. The product is made quickly all the time, as long as raw materials are provided. The ammonium polyphosphate produced by the reaction may be blended with the condensate. Synthesis / Manufacturing Process of Mono Ammonium Phosphate T he major raw material to all the phosphates is Phosphoric Acid. 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. The ammonium phosphate solutions can conveniently be shipped to remote sites near the intended use and blended to particular fertilizer strengths, for example 10-34-0. Modern synthetic fertilizers are composed mainly of nitrogen, phosphorous, and potassium compounds with secondary nutrients added. The spray reactor may be a conventional spray vessel constructed of suitable alloys to withstand the conditions of the reaction, for example, stainless steel. The non-granular form is used as a liquid fertiliser. 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. 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. The ammonium phosphate solution was recycled to the reactor at about 25% of the net product flow. At a given pressure, finer orifice size produces smaller droplets. EFFECT: improved process control to form uniform improved-quality product and reduced ammonia emission. The product had the following analysis: The product had a nutrient availability (citrate solubility test) of 100%. The following examples are given to illustrate conditions in the process and conversion of polyphosphate in the production of a stable fertilizer product. The aqueous ammonia condensate may be subsequently used as blend stock in preparing mixed fertilizers, as is known in the art. 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