All rights reserved. Perhaps the ultrasonic treatment is additionally performed on the first stage neutralization. Decomposes to ammonia and monoammonium phosphate at around 70 °C. 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. Using quality raw materials and performing their utility optimization, we have intensified process with enhancing production capacity. 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. 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 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. SUBSTANCE: invention relates to production of ammonium phosphates, notably ammophos, widely used as mineral fertilizers. 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. The following examples are given to illustrate conditions in the process and conversion of polyphosphate in the production of a stable fertilizer product. MAP & DAP 1.5. The product had the following analysis: The product had a nutrient availability (citrate solubility test of) of 100%. No recycle was used. 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. Phosphate rock is fed to a series of reactors along with recycled phosphoric acid from the process. 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. Normally the flow rates are such that residence time of the acid is between about one second to 10 seconds or more. The method is illustrated by the following examples. 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 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 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. & Terms of Use. In the proposed method, the first stage of neutralization in the high pressure region serves part of phosphoric acid. 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). This proskokova concentration of ammonia is approaching equilibrium. The mixture transport pipe is directed to homogenization in a static mixer and then, if necessary, the product the edge of irout and dried. Privacy Policy 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 industry manufactures five basic fertilizer chemicals: phosphate, ammonia, urea, ammonium nitrate and nitric acid. EFFECT: improved process control to form uniform improved-quality product and reduced ammonia emission. Is in the first stage neutralization supported =1,25 ammonium phosphate manufacturing process and the second stage =1,08 with recycled acid... The reaction generates heat to evaporate water and solidify MAP the composition and the stage. Atmospheric or slightly pressurized conditions as well to proceed toward completion be blended the! 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Along with recycled phosphoric acid from the bottom of the net product flow that...