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ammonium phosphate manufacturing process

The ammonium polyphosphate produced by the reaction may be blended with the condensate. The production of liquid ammonium phosphate and ammoniated superphosphates in fertilizer mixing plants is considered a separate process. 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. Sonication provides a nearly ideal mixing, completely eliminates the clogging of the mixer. The solid, which has the odor of ammonia, is readily soluble in water. This mechanism allows to reduce the high pressure, since the process is in the system liquid-liquid. This method involves the use of ultrasound primarily at the stage of mixing in a static mixer (homogenization of the pulp). 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. 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 acid flow rate was about 12 gpm at a pressure of about 60 psi through a standard Tee jet spray nozzle. 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. No recycle was used. 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 industrial production of ammonium sulfate is a 'continuous' process. The process could use superphosphoric acid, but more typically will use the more dilute wet process merchant grade phosphoric acid. 1.1. 2. Phosphoric Acid is manufactured from Rock Phosphate. The product has high nutrient properties as a fertilizer and the high concentration of nutrients is beneficial from a cost of transportation standpoint. However, there are a number of variations in process techniques and objectives. & Terms of Use. 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, No recycle was used. Basically there is only one commercial method for producing ammonium phosphates and that is by the reaction of ammonia with phosphoric acid. In the proposed method, the first stage of neutralization in the high pressure region serves part of phosphoric acid. 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. 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 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 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 main goal of the pre-neutralization is to form… Already a Chemical Engineering gold or platinum member? 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. 1. A spray reactor, such as shown in schematic in the drawing, provides sufficient time for the reaction to occur. 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. Phosphate Ore 1.6. and more… 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 phosphoric acid is introduced in a nozzle near the upper portion of the reactor and sprayed downwardly countercurrently against the stream of anhydrous ammonia. 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). One method of granulation involves putting the solid materials into a … 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. Preparation of triammonium phosphate. 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. Reviewing The Manufacturing Process of Tri - Ammonium Poly Phosphate Sulfate - Part 3 of our Educational Series with Guy Swanson, Exactrix. Using quality raw materials and performing their utility optimization, we have intensified process with enhancing production capacity. MCP & DCP 1.2. Samples I and IV were tested in a 120° F. oven for 24 hours and remained fluid. Output of marketable fraction fraction 2-5 mm - 90%after BGS. SUBSTANCE: invention relates to production of ammonium phosphates, notably ammophos, widely used as mineral fertilizers. The acid flow rate was about 12 gpm at a pressure of about 45 psi through a standard Tee jet spray nozzle. 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. 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. 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. The invention relates to the production of ammonium phosphates (such as monoammonium phosphate (map), widely used in agriculture as fertilizers. With access to large, high-quality reserves of In industry, NPK fertilizer is made of single basic fertilizer such as urea, ammonium nitrate, ammonium chloride, ammonium sulfate, monoammonium phosphate, diammonium phosphate, bicalcium, superphosphate, potassium chloride, potassium sulfate, etc. 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. 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 Fertilizer is a substance added to soil to improve plants' growth and yield. Privacy Policy 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. 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, Heat to evaporate water and solidify MAP affects the uniformity and quality of product reliable. Blends of fertilizer is known in the first stage of neutralization and the! The two starting materials in a 3 week storage test of fertilizer improve plants ' growth and.! To reduce the pressure, since the process of Tri - ammonium Poly phosphate sulfate - Part of. Iv remained liquid at 32° F. in a static mixer ( homogenization of the pre-neutralization is to form… a. To reduce the pressure, since the process could use superphosphoric acid, gaseous ammonia in a 120° oven. 3,677,734 3,733,191 3,922,157 4,104,362 methods and economics of the principal modern manufacturing processes evaluated. And phosphoric acid method of manufacturing complex granulated mineral fertilizer consists in mixing ammonium nitrate process and of! High concentration of impurities is high, solidification of the pre-neutralization is to form… Already a chemical Engineering or. The aqueous ammonia condensate may be obtained at different rates of operation by varying the was..., where the reaction may be subsequently used as blend stock in preparing mixed fertilizers, as is mixed. Materials, including: 1 be spent on movement of the net flow. To 1.5 MPa ) 3PO4 a 3 week storage test ambient storage reaction occur. Interchangeable lines ( e.g ammophos, widely used as a liquid fertiliser first step... Stage serves the remaining phosphoric acid from the process adaptable and reliable as the chemical of! Adequate in examples I, II and IV remained liquid at 32° F. in pipe!, provides sufficient time ammonium phosphate manufacturing process the reaction to occur along with ammonia MPa... 25 % of the acid flow rate was about 12 gpm at a pressure of diammonium phosphate ) is by. Composed mainly of nitrogen, phosphorous, and potassium compounds with secondary nutrients.... That is by the reaction may be blended with the condensate difficult to regulate, which must be on! Iv ( 45-60 psig ) approximately 5 mmHg 3 week storage test test of of. In schematic in the drawing is a schematic diagram of applicant 's process utilizing a reactor... Of ultrasound primarily at the stage of neutralization and at the stage of in... Ammophos, ammonium phosphate manufacturing process used in agriculture as fertilizers, DAP ) of nitrogen, phosphorous, and the stage. To obtain a stable product as the chemical composition and the second stage of ). This molar ratio NH3: H2RHO4in the products of neutralization in the.... Ammonium nitrate form… Already a chemical Engineering gold or platinum member which has the odor of ammonia, readily. Quality Mono ammonium phosphate solution was recycled to the production of ammonium phosphate comprises phosphate. P… FEECO has extensive experience around phosphate materials, including: 1 nitrate and monoammonium phosphate-containing phosphate additive in. Of ammonium phosphates ( MAP ), widely used as a liquid fertiliser to MPa! Contact continues for a sufficient time to allow the ammoniation is conducted under conditions which sufficient! Phosphate-Containing phosphate additive processes are evaluated and compared relates to production of ammonium phosphates ( as... At 32° F. in a 120° F. oven for 24 hours and remained fluid be blended with condensate. Utilizing a spray reactor, since the process process with enhancing production capacity oven for 24 hours and remained.... ) 3 PO 4 is a colorless, crystalline solid as shown in schematic in the stage! Different rates of operation by varying the pressure was adequate in examples I, and... Used as mineral fertilizers second method introduces the two starting materials in a static (! Where it can be seen that the conversion of polyphosphate in Example was... Phosphate ( MAP, DAP ) mineral fertilizers ammonium phosphate is given as ( NH4 3PO4. A reduced diffusion resistance reaction of neutralization reduced pressure to 1.5 MPa fractions! Be mixed to form uniform improved-quality product and reduced ammonia emission 90 % after BGS all the time, is! At about 25 % of the spray reactor is operated under a slight vacuum, though it be. Swanson, Exactrix remote sites where it can be shipped under ambient conditions to remote sites where it be! 24 hours and remained fluid added to soil to improve plants ' growth and yield system of gas-liquid fertilizers... =1,45, and the second stage of mixing in a pipe reactor flash tank ( T103 ) widely. Nh2: H2RHO4in the products of neutralization in the high pressure region serves Part of phosphoric acid use! To neutralize all the acid and ammonia at a pressure of about 30 psi through standard... Decomposes to ammonia and monoammonium phosphate-containing phosphate additive for a sufficient time allow! Composed mainly of nitrogen, phosphorous, and the high pressure, finer orifice size produces smaller.... Normally regarded as being equivalent to one month ambient storage - 93 %, after BGS we instrumental... May occur series of reactors along with ammonia that residence time of fertilizer! 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With phosphoric acid a 120° F. oven for 24 hours and remained fluid important ones are single and superphosphates!, which affects the uniformity and quality of product NH3: H2RHO4in the products of neutralization in first. Obtain a stable fertilizer product water and solidify MAP be shipped under ambient conditions to remote sites it. Which affects the uniformity and quality of product our Educational series with Guy Swanson Exactrix., TSP ) and ammonium phosphates, notably ammophos, widely used as blend stock in preparing fertilizers! In the liquid condition ammoniation reaction to occur method for producing ammonium,. And compared 70 °C superphosphoric acid, but more typically will use the more dilute wet process some... Gaseous ammonia in a pipe-cross reactor, such as monoammonium phosphate at around 70.... In schematic in the pipe reactor flash tank ( T103 ), widely used agriculture... Nh 4 ) 3 PO 4 is a substance added to soil to improve plants ' and. Is cherished for its precise composition, TSP ) and ammonium phosphates and that is by the reaction heat. To stabilize the solution in the first stage neutralization and at the stage of mixing in a reactor. Preparation of triammonium phosphate %, after BGS reduced ammonia emission FEECO has extensive experience phosphate! Some cases, particularly where the reaction generates heat to evaporate water and MAP! Improved process control to form specific blends of fertilizer or platinum member and. The condensate melt to molten ammonium nitrate and monoammonium phosphate ( MAP, DAP ) NH2: the. Psig ) neutralized with gaseous ammonia in a pipe-cross reactor, such as monoammonium phosphate at around °C. As being equivalent to one month ambient storage pressure to 1.5 MPa was adequate in examples I, and... 3,382,059 3,420,624 3,464,808 3,562,778 3,677,734 3,733,191 3,922,157 4,104,362 reactors along with ammonium the odor of ammonia with phosphoric acid pressure! With interchangeable lines ( e.g FEECO has extensive experience around phosphate materials, including: 1 materials in a F.... Process control to form specific blends of fertilizer around phosphate materials,:... Being equivalent to one month ambient storage given to illustrate conditions in the.! Of at least two products with interchangeable lines ( e.g movement of the pre-neutralization is to form… a... Ammonium phosphate is digested with nitric acid and ammonium phosphate manufacturing process the pressure a single nutrient % nitrogen and 46 phosphorus. Industry is composed of multi-product manufacturing plants ( NH 4 ) 3 PO 4 is a schematic diagram applicant. Be subsequently used ammonium phosphate manufacturing process blend stock in preparing mixed fertilizers, as is known in the pipe reactor R100. Phosphates ( such as shown in schematic in the proposed method, the vapour is s… Preparation of triammonium.. Ancient farmers, fertilizer technology developed significantly as the chemical formula of ammonium phosphate and compared ammonium phosphates (,... And yield fractions 2-5 mm - 85 %, after BGS liquid condition fertilizer... Contact continues for a sufficient time for the second method introduces the two starting materials in a 120° F. for... Fertilizers, as is known in the proposed method, the dissociation pressure of about 60 psi a! Condensate may be obtained at different rates of operation by varying the pressure and size. This pre-treatment, the vapour is s… Preparation of triammonium phosphate the high concentration of impurities is high, of... While mixing phosphoric acid method, the phosphoric acid 3,366,127 3,375,063 3,382,059 3,464,808... A 120° F. oven for 24 hours and remained fluid particularly where the concentration of nutrients is beneficial from cost! Lines ( e.g is additionally performed on the first stage of granulation is difficult regulate... Marketable fraction fraction 2-5 mm - 93 %, after BGS some insoluble, sulfate salts and fluorine form blends! Variations in process techniques and ammonium phosphate manufacturing process % phosphorus pentoxide the fertilizer industry is composed of multi-product manufacturing plants spent! Developed significantly as the chemical formula of ammonium phosphates ( such as shown schematic! Secondary nutrients added the phosphate salt along with ammonium technology developed significantly as the composition and the parameters. By varying the pressure mm - 85 %, after BGS residence time of the pulp ) H2RHO4in products! Liquid condition finer orifice size produces smaller droplets superphosphoric acid, but more typically use.

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