Thermodynamic Justification for the Production of Sulfur-containing Nitrogen-Phosphorus Fertilizers
Keywords:
thermodynamics, thermodynamic calculations, thermodynamic characteristics, thermodynamic analysis, phosphate Karatau and KyzylkumAbstract
Objective. The article introduces a predetermination of the possibility of a reaction and therefore of the salt composition of the final products which, due to the complexity of the original and final products, is extremely difficult. Therefore, the reaction of tricalcyphosphate, calcium carbonate, magnesium, iron oxides and aluminium, i.e. those which are possible during the production of phosphorus sulfur-containing fertilizers, was analysed.
Methods. Thermodynamic analysis makes it possible to predetermine the possibility of a reaction and therefore the salt composition of the final products, which are extremely complex due to the complexity of the original and final products.Therefore, the reaction of tricalcyphosphate, calcium carbonate, magnesium, iron oxides and aluminium, i.e. those which are possible during the production of phosphorus sulfur-containing fertilizers, was analysed.
For each reaction we found the isobarn-isothermic potential and judged the possibility of a reaction (negative value G).Thermodynamic calculations of possibilities of formation of phosphates and sulphates of calcium, magnesium, iron, aluminium in process of production of sulfur-containing nitrogen-phosphorus fertilizers were carried out according to simplified formula ∆G=∆Н-T∆S Thermal capacity excluded.
Results. The phosphates of the Central Kyzylkum differ substantially from the phosphate Karatau in chemical composition and therefore the main contribution to the thermal effect of the interaction of phosphate with phosphate and sulfuric acids are the processes of interaction with tricalcyphosphate and calcium carbonate.
Conclusion. 96% the thermal effect of the interaction of phosphate CK is the interaction of tricalcyphosphate and calcium carbonate with phosphoric acid and 95,4% with sulphuric acid. The heat effects of the other components do not exceed 4-4,6%.
References
Thermodynamic Justification of the Process of Extraction of Phosphoric Acid from Central Kyzylkum Phosphate // Universum: Technical Sciences : Electron. Scientifically.Jurn.Volynskova N.V. [etal.].2019. № 1(58). URL: http://7universum.com/ru/tech/archive/item/6856
Mamurov B. A. Development of calcium and magnesiphosphate fertilizer technology using local carbonate raw materials. Diss. kand.techn.science. - Namangan, 2020. – 146с.
Geology and minerals of the Republic of Uzbekistan / T.N. Dolimov, T.S. Shayakubov et al.: Redkol.: T.S. Shayakubov (Gl.) and others. - T.: University, 1998. – 724с.
Gafurov K., Shamshidinov. I.T., Arislanov A.S. Research and development of obtaining complex defluorinated fertilizers from phosphorites of Karatau. Research report on the state budget, state register No. 01.88.0017867. Namangan, 1991 one. Antipenko G.L., Markov S.S. Possible ways of rational use of fluorine sources. -Khim.prom.-1974. -№9. -P.43 (638).
Gafurov K., Shamshidinov IT, Arislanov A.S. Sulfuric acid processing of high-magnesium phosphates and obtaining NPS-fertilizers based on them. Monograph. Publishing house "Istedodziyo press"Namangan-2020... P.26-27
Shamshidinov I.T., Kan N.R., Usmanov I.I., Mirzakulov Kh.Ch. Investigation of the process of defluorination of extraction phosphoric acid from phosphorites of the Central Kyzyl Kum // Uzbek chemical journal. - Tashkent, 2017. - No. 2. - P. 47-54.
Erkaev A.U., Mirzakulov Kh.Ch. Dephorization of extraction phosphoric acid from Karatauphosphorites. / Ed. Uzbek. chem. zhurn. - Tashkent, 1992.-- 15 p. Dep. in VINITI, 5.02.1992. - No. 403 B-92.
Mirzakulov Kh.Ch. Development of an effective technology for defluorination of extraction phosphoric acid from Karatauphosphorites. / Author's abstract. diss…. Cand.tech. sciences. - Tashkent, 1993 .-- 25 p.
Erkaev AU, Mirzakulov Kh.Ch., Rakhimov U. Intensification of the pulp thickening process during defluorization of extraction phosphoric acid from Karatauphosphorites. / All-Union. conf. on the chemical technology of inorganic substances: Abstracts. report - Kazan, May 29-31, 1991 - P. 57.
Mirzakulov Kh.Ch., Erkaev A.U., Mirkhuzhaev M.M. Phosphorus extraction by acids sinning fluorosislanningyangi roasting technologies. // Ўzbekiston FA 50 yilligigabaғishlangan I yosholimlarvamutahassislarninganjumani. Chit-93 Maruzalarmatni. May 27-28, 1993 Toshkent. - B. 15.
Gafurov K., Shamshidinov. I.T., Arislanov A.S. Defluorination of extraction phosphoric acid during its extraction. "VestnikFerPI", Fergana, 2005, No. 1
Gafurov K., Arislanov A., Shamshidinov I. Reduction of fluoride compounds in phosphogypsum // Scientific and technical journal FerPI. - Fergana, 2004. - No. 3. - S. 63-66.
Gafurov K. Resource saving and improvement of ecological purity of products of processing of phosphorites of Karatau. Author's abstract. dis. ... doct. tech. sciences. - Tashkent, 1990 .-- 52 p.
14 Arislanov A.S., Rezhabbaev M., Soliev M., Abdurazzakova M. Defluorination of EPA during its extraction. Scientific electronic journal "Academic journalism". - Ufa: Aeterna, Russia-2018.-P.25
Arislanov A.S., Zhuraboev F., Dzhuraev M. Defluorination of EPA of Kyzylkumphosphorites in the process of decomposition: Collection of articles on the results of the International scientific and practical conference (Chelyabinsk, May 26, 2018) in Part 1 - Sterlitamak: AMI, 2018 .--267 p.
Gafurov K. Defluorinated fertilizers from phosphorites of Karatau. - Tashkent: FAN, 1992 .-- 200 p.
Patent No. 5698 UZ. Method of obtaining extraction phosphoric acid / Gafurov K., Shamshidinov I.T., Arislanov A., Mamadaliev A. (UZ) / 1998. - Byul. No. 4.
Gafurov K. Resource saving and improvement of ecological purity of products of processing of phosphorites of Karatau. Dis. ... doct.tech. sciences. - Tashkent, 1990 .-- 52 p.
