At a given pressure, finer orifice size produces smaller droplets. curriculum-key-fact Privacy Policy A spray reactor, such as shown in schematic in the drawing, provides sufficient time for the reaction to occur. The solid, which has the odor of ammonia, is readily soluble in water. The aqueous ammonia condensate may be subsequently used as blend stock in preparing mixed fertilizers, as is known in the art. 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. 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. 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. The pressure was adequate in Examples I, II and IV (45-60 psig). The product is made quickly all the time, as long as raw materials are provided. 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 invention relates to the production of ammonium phosphates (such as monoammonium phosphate (map), widely used in agriculture as fertilizers. The method allows to obtain a stable product as the composition and the chemical composition and the process adaptable and reliable. 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. The liquid fertilizer can be shipped under ambient conditions to remote sites where it can be mixed to form specific blends of fertilizer. 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. 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. Output - 40 t LFA brand 10,8-52,0. 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. 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. 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.=100 watts. The method according to claims 1 and 2, characterized in that the ultrasonic treatment is additionally carried out and in the first stage neutralization. The following examples are given to illustrate conditions in the process and conversion of polyphosphate in the production of a stable fertilizer product. after being crushed to a certain fineness, the material is agglomerated and granulated in the rotary drum granulator or disk granulator through … Some chemical compounds are added into the crude phosphoric acid in a sedimentation tank (T101), and the insoluble is precipitated out and separated from the phosphoric acid. Phosphate-based p… Samples I and IV were tested in a 120° F. oven for 24 hours and remained fluid. The non-granular form is used as a liquid fertiliser. Phosphate Ore 1.6. and more… The ammoniation is conducted under conditions which form sufficient ammonium polyphosphate to stabilize the solution in the liquid condition. 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. Phosphate rock is fed to a series of reactors along with recycled phosphoric acid from the process. 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. 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. The acid flow rate was about 12 gpm. Additive is introduced by way of melting it followed by admixing resulting melt to molten ammonium nitrate. Phosphoric Acid is manufactured from Rock Phosphate. If the impurities are not sequestered, gelatinous precipitates can form over time in the liquid ammonium phosphate fertilizer, creating difficulties in its use. Synthesis / Manufacturing Process of Mono Ammonium Phosphate T he major raw material to all the phosphates is Phosphoric Acid. 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. EFFECT: improved process control to form uniform improved-quality product and reduced ammonia emission. Sonication provides a nearly ideal mixing, completely eliminates the clogging of the mixer. While particular embodiments of the invention have been described, it will be appreciated by those skilled in the art that various modifications may be made within the teachings of the invention. 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. With access to large, high-quality reserves of This significantly reduces the leakage of ammonia, because the process is in terms of preammonization slurry, the viscosity of which is much smaller. 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. The product had the following analysis: It can be seen that the conversion of phosphate to polyphosphate in Example III was low. The disadvantage of this method is its adaptability to manufacture due to frequent driving equipment at the stage of mixing the pulp (homogenization). The most important ones are single and triple superphosphates (SSP, TSP) and ammonium phosphates (MAP, DAP). Output of marketable fractions 2-5 mm - 93%, after BGS. at a pressure of about 60 psi through a standard Tee jet spray nozzle. In this way serves to neutralize all the acid and ammonia at a sufficiently high pressure up to 8 MPa. The ammonium phosphate solution was recycled to the reactor at about 25% of the net product flow. Modern synthetic fertilizers are composed mainly of nitrogen, phosphorous, and potassium compounds with secondary nutrients added. 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 process of granulation is difficult to regulate, which affects the uniformity and quality of product. All rights reserved. All the process parameters can significantly reduce ammonia losses in the overall process (stage neutralization and at the stage of granulation). In a tubular reactor serves 42.9 tonnes of phosphoric acid with a concentration of P2O5- 40% (82.5 per cent of the total) and mix with 5,543 tons of ammonia at a pressure of 5.0 MPa. 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, 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. 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 acid temperature was about 240° F. Anhydrous ammonia at a temperature of about 475°-500° F. was introduced at the bottom of the spray reactor at a flow rate of about 1-2 gpm. 2 cl, 3 ex The invention relates to the production of ammonium phosphates (such as monoammonium phosphate (map), widely used in agriculture as fertilizers. 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. When applying for the second stage of neutralization reduced pressure to 1.5 MPa. the ATEM mixture is sent to the second stage of neutralization, The second stage serves the remaining phosphoric acid and reduce the pressure. The second method introduces the two starting materials in a pipe-cross reactor, where the reaction generates heat to evaporate water and solidify MAP. 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. 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 mixture transport pipe is directed to homogenization in a static mixer and then, if necessary, the product the edge of irout and dried. 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. In a tubular reactor serves to 41.6 tonnes of phosphoric acid with a concentration of P2About5- 40% (80% of the total) and mix with 6,120 tons of ammonia at a pressure of 3.5 MPa. When this molar ratio NH2:H2RHO4in the products of neutralization in the first stage neutralization supported =1,30, and the second stage =1,08. The drawing is a schematic diagram of applicant's process utilizing a spray reactor. The use of synthetic fertilizers has significantly improved the quality and quantity of the food … Normally the flow rates are such that residence time of the acid is between about one second to 10 seconds or more. 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. The crude phosphoric acid by wet process contains some insoluble, sulfate salts and fluorine. Initially, phosphoric acid, gaseous ammonia, and scrubber liquor are directed to the pre-neutralizer reactor. 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. 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\ Samples I, II and IV remained liquid at 32° F. in a 3 week storage test. 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. This intimate contact continues for a sufficient time to allow the ammoniation reaction to proceed toward completion. It is a very unstable compound. 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. 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 phosphoric acid is introduced in a nozzle near the upper portion of the reactor and sprayed downwardly countercurrently against the stream of anhydrous ammonia. SSP is simple to produce but is nowadays less popular. SUBSTANCE: invention relates to production of ammonium phosphates, notably ammophos, widely used as mineral fertilizers. 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 ammonium phosphate solution was recycled to the reactor at about 10% of the net product flow. Privacy Policy The ammoniation is conducted under conditions which form sufficient ammonium polyphosphate to stabilize the solution in the liquid condition. 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. Initially, rock phosphate is digested with nitric acid and phosphoric acid. The industry manufactures five basic fertilizer chemicals: phosphate, ammonia, urea, ammonium nitrate and nitric acid. The process could use superphosphoric acid, but more typically will use the more dilute wet process merchant grade phosphoric acid. 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 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 ammonium phosphate may be used as is or mixed with other materials to form various fertilizer compositions. When this molar ratio NH3:H2RHO4in the products of neutralization in the first stage neutralization supported =1,45, and the second stage =1,05. 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). 1. No recycle was used. Perhaps the ultrasonic treatment is additionally performed on the first stage neutralization. MAP & DAP 1.5. MCP & DCP 1.2. Preparation of triammonium phosphate. 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