Articles
| Open Access | DISSOLUTION OF PHOSPHORITES BY VARIOUS ACIDS UNDER DIFFERENT NORMALITIES
Kudiyarova Ayimxan, Nurmurodov Tulkin Isomurodovich , 1.PhD student in "Chemical Engineering" at Karakalpak State University 2.Vice-Rector for Scientific Research and Innovations at Navoi State Mining and Metallurgical Institute, Professor at the Department of Chemical TechnologyAbstract
The acid dissolution of phosphorite (phosphate rock) is foundational to the industrial production of phosphoric acid and phosphate fertilizers. This study critically examines the effects of acid type, acid concentration, and reaction conditions on the dissolution behaviour of phosphorite minerals. Key outcomes include the identification of reaction mechanisms for hydrochloric, sulfuric, and phosphoric acid systems, kinetic controls under varying normalities, and comparative leach efficiencies. Data indicate that dissolution follows multistage kinetics influenced by acid strength, mineralogy, particle size, and temperature. This research consolidates existing knowledge on the acidolysis of phosphorite and underscores the importance of optimizing acid conditions for efficient phosphorus extraction.
Keywords
phosphorite dissolution, acid leaching, phosphoric acid, sulfuric acid, hydrochloric acid, kinetics, phosphorus solubility.
References
Phosphorite mineralogy and composition, Wikipedia. 2025. Available at: https://en.wikipedia.org/wiki/Phosphorite. [Accessed Nov 2025].
Sevim F., Sarac H., Kocakerim M. M., Yartas A. Dissolution Kinetics of Phosphate Ore in H$_2$SO$_4$ Solutions, Ind. Eng. Chem. Res., 2003;42: 2052–2057. DOI: 10.1021/ie020168o. [with kinetics and activation energy].
Azeez R. S. Estonian Phosphate Rock Dissolution in Hydrochloric Acid, Minerals, 2024;13(4):578. [dissolution with HCl and effects of acid dosage].
Dissolution of Phosphate Rock by Mixed Acids, ResearchGate (2005). [acid mixtures and stages].
Hamadi A. S. Phosphate Rock Treatment with Hydrochloric Acid, 2022. [effects of concentration and temperature].
Li Z., Xie Z., Deng J., Leaching Kinetics of Rare Earth Elements in Phosphoric Acid from Phosphate Rock, Metals, 2021;11:239. DOI:10.3390/met11020239.
Zafar I., Ansari T. M., Ashraf M., Abid M. A., Effect of Hydrochloric Acid on Leaching of Calcareous Phosphorites, Iran J Chem Chem Eng International, 2006;25(2):47–57.
Mizane A. et al., Dissolution of Djebel Onk Phosphate Ore Using Sulfuric Acid, 2015. [industrial type dissolution].
Roshdy O. E. et al., Leaching of Rare Earths from Abu Tartur Phosphate Rock Using Phosphoric Acid, J. of Jpn J Rare Earths, 2023.
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