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 phosphate maintaining the hydrogen ion concentration of the solution within the limits of pH=6.8 and pH=7.6, and removing the impurities present in said solution by filtration. Sulfuric acid (H 2 SO 4) is important in the production of fertilizers (e.g., ammonium sulfate (sulfate of ammonia), (NH 4) 2 SO 4, and superphosphate, Ca(H 2 PO 4) 2, which is formed when rock phosphate is treated with sulfuric acid). 8.4 Ammonium Sulfate 8.4.1 General1-2 Ammonium sulfate ([NH4]2SO4) is commonly used as a fertilizer. MANUFACTURING METHOD a) Flue Gas Flue gases are source of the ammonium sulfate. By this I mean that the conditions, so far as hydrogen ion concentration is concerned, must be rather closely controlled, since, as I will show in more detail later, it is not possible to make a particular ammonium phosphate by an economical process under all conditions under which such ammonium phosphate is produced in solution. The concentration of acid and ammonia contained in scrubber 16 will, for most conditions of operation, be of such a degree that no crystallization will take place therein. & Terms of Use. Fertilizer Manufacture Diammonium Phosphate Fertilizer. If weaker acid is supplied to the saturator, I may increase the heat in the gases somewhat, in order to keep, the amount of liquid in the saturator at a constant level. As a result of extensive tests on the influence of hydrogen ion concentration on the properties of ammonium phosphate crystals, I have come to the conclusion that such crystals are probably more sensitive to acid concentration than are the crystals of ammonium sulphate, which compound is now so commonly made as a by-product in coke manufacturing plants. As described in my earlier filed application, of which this is a division, if I maintain the solution within the above range, I am able to obtain crystals which are well developed structurally, which settle rapidly from solution, and which are quite pure. The obtained phosphoric acid is then used in the production of a series of liquid or solid fertilizers. What I claim is: 1. the production of ammonium phosphates (monoammonium phosphate, or MAP, and diammonium phosphate, or DAP), nitrophos-phates, potash, and compound fertilizers. Phosphate Ore 1.6. and more… FIRST-AID MEASURES Eyes In case of eye contact, rinse with plenty of water and seek medical attention if necessary. Most phosphate fertilizers are highly water soluble. The non-granular form is used as a liquid fertiliser. In this process a neutralization of phosphoric acid to a stage halfway between the monoammonium and diammonium phosphate is effected, after which the reaction mixture is removed from the saturator and acidified with phosphoric acid to convert the diammonium phosphate to the mono salt. NPK 1.3. 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. One object of this invention is the provision of a direct process by which ammonium phosphate may be produced continuously by reaction of ammonia gas and phosphoric acid. A concentrated phosphoric acid with above 90% by weight H 3 PO 4 can be used as starting reagent. The most important ones are single and triple superphosphates (SSP, TSP) and ammonium phosphates (MAP, DAP). Siemens 54,252 views. Phosphate-based … As a consequence the mother liquor becomes more concentrated with respect to impurities, and it becomes increasingly difficult for pure crystals to form. di ammonium phosphate process and flow chart BINQ Mining. In carrying out this variation of my process, 7 I find it desirable to supply heat to the diammonium phosphate solution flowing through pipe 26 by means of heater 28, so that crystals are prevented from forming until the addition of phosphoric acid in vessel 30 is complete. The most important ones are single and triple superphosphates (SSP, TSP) and ammonium phosphates (MAP, DAP). FIRST-AID MEASURES Eyes In case of eye contact, rinse with plenty of water and seek medical attention if necessary. phosphate and ammoniated superphosphates in fertilizer mixing plants is considered a separate process. In subsequent steps, the filtered acid is then con- 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. Solid diammonium phosphate shows a dissociation pressure of ammonia as given by the following expression and equation: If it is desired to obtain a crystal of maximum purity, the pH should be maintained within the narrower limits given above, and particularly as close to 7.4 as possible. 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. H����o���q��DY��eX�5ɂ���u�s7�IW oE��X���%����$�ۀ�F���u.��f[.�Y����O;琔H��-ۭb��i#��NR��Y �}��� ��f�f;� �wQ �s�;� x:��}���)�mߵ��oo�B����*��n��yy��h�{m���Q�N�)�����T9�z�*��w5��V�*�^�.k�6���M�}��G�(k�/�Cί9�t�zί哭����eyG�TS�js���|G_�\��9 t�nBK��(�ja+_�S�9�B�~.�����Q����ŷ�}+�;k| ��zm|���*����] m��.����=i��1qb^X�X�;��ᱣ�@n�b��6GY0cOQ3�����I��j�K�3>�0��1-�e�ѫ��Ōa��_�>e�̊�x�M��7g�;��~p������1�(������S4��ф��N���Qd��;*�x�V}�̢��|��/�u�)V������߀����UE$B�B�'���b����_�6���g��{��������U���弌�o�V\[{����J��no��\O����6]Uu,�"��S�>��P�����0���U$�6�C��9S���j^��q��Q����)J�$����m?8Z����L�c�Q6�Է�>� %1j�Mt3i�|���1}�!����������`�E!���(�Z���I.^*��T�ֱe��M�!$���w� �p���V����&��}�Ǡ�&4�I{��Mw3tvAu�-e��w���i�� MCP & DCP 1.2. A process for producing diammonium phosphate, comprising reacting ammonia with phosphoric acid in solution under conditions to maintain in said solution a hydrogen ion concentration between the limits of pH=6.8 and pH=7.6. AS Ammonium Sulphate by Saf Sulphur - Duration: ... How to Write the Formula for Ammonium phosphate - … "Mixed" fertilizers contain two or more primary nutrients. By this means I am able to make pure monoammonium phosphate crystals substantially free of diammonium phosphate. * It’s made of two constituents common in the fertilizer industry and contains the most phosphorus of any common solid fertilizer. The mixture of these two is sent to a filter to be separated in several washing steps. 15. This practice minimizes potential loss by leaching. 10. %PDF-1.2 %���� Phosphate Ore 1.6. and more… manufacturing fertilizers from raw materials, and the recovery of fertilizers as valuable by-products from waste streams or other processes. In some of the issued patents on processes for the manufacture of the ammonium phosphates, methods are disclosed in which gaseous ammonia is reacted in a packed tower with weak phosphoric acid, after which the solution of monoammonium phosphate is concentrated in an evaporator until the crystallization point is reached. This invention relates to a process for the production of ammonium phosphate, and particularly diammonium phosphate. Diammonium phosphate Fertilizer Manufacturing. 18. It will thus be apparent that my process may be operated to recover all of the ammonia present in the gas as an ammonium phosphate. A process for producing ammonium phosphates, comprising reacting by-product ammonia with phosphoric acid in solution under conditions to maintain in said solution a hydrogen ion concentration between the limits of pH=6.8 and pH=7.6, removing suspended solids from said solution, and then adding phosphoric acid to said solution. Refer to Section 13.Do not eat, drink, smoke, or use personal products when handling chemical substances. Another... Click for automatic bibliography By operating according to the present process, I am not confined to any particular strength of acid. Grade is oft\൥n expressed in terms of bone phosphate of lime \⠀䈀倀䰀尩 or phosphorus pentoxide \⠀倀㈀伀㔀尩. 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. Ammonium Phosphate Uses. Ammonium Phosphate Monobasic Created by Global Safety Management, Inc. -Tel: 1-813-435-5161 - www.gsmsds.com procedures when handling chemical materials. The production of superphosphate consists of three distinct steps. Throughout the preferred pH range (5.8 to 6.2) for formation of monoammonium phosphate, pronounced twinning of the crystals occurs, the type formed being largely the penetration twin. The plan is to add three quantities (1g, 2g, and 3g) of copper (II) phosphate into machine lubricant and test it on metal surfaces. If not breathing, give artificial respiration. A process for producing ammonium phosphates, comprising reacting ammonia with phosphoric acid in a solution containing impurities and under conditions to maintain in said solution a hydrogen ion concentration between the limits of pH=6.8 and pH=7.6, removing said impurities from said solution, adding phosphoric acid to said 35, purified solution to produce therein a hydrogen ion concentration between the limits of pH=5.6 and pH=6.2, and crystallizing ammonium phosphate from said solution. Step 1 - Phosphate rock blending and grinding Phosphate rock from different sources have different phosphate, fluoride and silica contents. Since I am able to produce, by my process, substantially pure, saturated diammonium phosphate solution, I may readily produce therefrom a pure monoammonium phosphate. Mother liquor removed from the crystals in the centrifuge is returned by means of pipes 12 and 9 to the saturator 4. The filtered mother liquor passes by means of pipe 22 into pump 23, whereby it is returned by pipe 24 into the crystal hopper 25 which forms the lower part of saturator 4. Sulfuric acid is manufactured at the site using the well-known contact process. 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 phosphate, maintaining the hydrogen ion cong centration of the solution within the limits of pH=6.8 and pH=7.6, removing a portion of said solution, filtering and returning it to the body of solution undergoing reaction. Step 1 - Phosphate rock blending and grinding Phosphate rock from different sources have different phosphate, fluoride and silica contents. As evidence for this statement, it is generally known that monoammonium phosphate, for example, will be formed in solution over a wide range of hydrogen ion concentrations, i. e., from about a pH of 3.0 to 6.5; however, only over a rather very definite range of acid concentration is it possible to produce crystals of this salt which can be readily and continuously removed from the saturator and in pure form. Anhydrous ammonia, along when it reacts with phosphoric acid, also results in the production of the ammonium phosphate. By a "direct process" I mean a process in which the ammonia contained in by-product gases is directly combined with phosphoric acid, and, hence, this term has the same meaning as when used in connection with the familiar ammonium sulphate process. These rocks are mixed in the blending plant to produce a … The production of liquid ammonium phosphate and ammoniated superphosphates in fertilizer mixing plants is considered a separate process. The process for manufacturing MAP is relatively simple. Since the crystal ejector 6 removes crystals from the lowest part of cone 25, it will therefore remove crystals having a higher degree of purity. By such means I am enabled to produce a diammonium phosphate of very high purity. In addition to calcium levels, ammonia and phosphate levels should be monitored. The partly neutralized acid will then be conveyed by pipes 17 and 5 to saturator 4, wherein the optimum conditions for formation of the desired ammonium phosphate will be maintained. MAP & DAP 1.5. Sulfuric acid (H 2 SO 4) is important in the production of fertilizers (e.g., ammonium sulfate (sulfate of ammonia), (NH 4) 2 SO 4, and superphosphate, Ca(H 2 PO 4) 2, which is formed when rock phosphate is treated with sulfuric acid). Phosphate water solubility is very important for early plant growth. Crystals forming from a solution with a relatively low pH (between 6.6-6.8) are relatively very small and ill-defined structurally. Proceeding in this manner, I add the requisite amount of phosphoric acid to the filtered solution withdrawn from the saturator, to produce either the pure mono- or the mixture of mono- and diammonium phosphate desired, cool and crystallize in the usual way. Diammonium Phosphate Mosaic Crop Nutrition CCA Commercial 2 5 NM CEU Fertilizers and Soil Amendments Because of its instability, it is elusive and of no commercial value. Ammonium phosphates are produced by mix-ing phosphoric acid and anhydrous ammonia in a reactor to produce a slurry. In addition to calcium levels, potassium and phosphate levels should be monitored. MAP & DAP 1.5. 9. In a process for producing ammonium phosphates from impure ammonia and phosphoric acid, the steps of maintaining the hydrogen ion concentration of ammonium phosphate solutions between the limits of pH=6.8 and pH=7.6 while removing impurities therefrom. Ammonium Phosphate Ammonium phosphate is an incomplete complex fertilizer and both monoammonium and diammonium phosphates are manufactured by the combination of ammonia with H 3PO 4 and also by treating with rock phosphate with H 2 SO 4and (NH 4 ) 2SO 4 as follows: NH3+ H 3PO 4 = NH 4H 2PO 4 (Mono-ammonium phosphate) 2 NH3+ H 3PO 4 = (NH 4 ) 2 H 2PO 4 NPK 1.3. 13. Figure 1. Ammonium sulfate as by-product The right choice for you GEA Messo PT has a reference list of over fifty successful ammonium sulfate crystallizer installations around the world, has several patents on associated process and equipment features, and continues to work hard on improving its technology for the benefit of its clients. However, only over a restricted range of hydrogen ion concentrations is it possible to produce crystals from saturated solutions which can be readily and continuously removed from the saturator and in a pure form. Thus, it … The 756 actual amount of ammonia in the scrubbed gases is relatively small, amounting to from 5% to 20% of that entering the scrubber; and, hence, in many cases the gas may be further processed without regard to its presence. The industry manufactures five basic fertilizer chemicals: phosphate, ammonia, urea, ammonium nitrate and nitric acid. 4. 16. Referring to Figure 1, a by-product gas, such, for example, as coke-oven gas containing about 1% of NH3, by volume, passes by means of pipe I into a heater 2, where its temperature may be adjusted, if necessary. © 2004-2020 FreePatentsOnline.com. A further object is the provision of a process by which pure ammonium phosphates may be produced by the use of relatively impure ingredients, such as byproduct ammonia and crude phosphoric acid. These rocks are mixed in the blending plant to produce a … Ore grade in the phosphate mining industry is one of the primary criterion used to differentiate phosphate ores. 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