The aim of the study is to obtain magnesium hydroxide by complex, nitric acid processing of dolomite from the Dekhkanabad deposit. The results of the influence of technological parameters on the degree of decomposition of dolomite with 40, 50 and 57% nitric acid at 100 and 110% norm are given, the kinetic characteristics of the process, the composition of the liquid phase, the degree of transition of the dolomite components into the nitric acid solution, the rate of clarification and filtration of the nitric acid extract, the ammonization process are established of clarified nitric acid solutions on the composition of the liquid phase, the degree of transition of dolomite components into the solution, the rate of clarification and filtration of nitric acid extract, the process of ammonization of clarified nitric acid solutions on the composition of the liquid phase and the degree of magnesium precipitation, the rate of nitric acid on the decomposition of dolomite and pulp temperature on the filtration rate of magnesium hydroxide.
O. S. Bobokulova, Development of Technology for Processing Raw Materials of Lakes Karaumbet and Barsakelmes into Magnesium Hydroxide, Magnesium Oxide, and Sodium Sulfate, Ph.D. dissertation, Tashkent, Uzbekistan, 2018, 112 p.
S. V. Lanovetsky, D. I. Zykov, V. Z. Poylov, and O. K. Kosvintsev, “Investigation of the effect of synthesis parameters on the particle size of magnesium hydroxide,” Bull. PNRPU. Chem. Chem. Technol., vol. 54, no. 3, pp. 57–61, 2011.
I. N. Lepeshkov and B. Ya. Rozen, Mineral Resources of the Sea. Moscow, USSR: Nauka, 1972, 120 p.
J. Li, Z. Zhao, J. Liu, and Y. Zhang, “Preparation of magnesium hydroxide from dolomite via nitric acid leaching and precipitation,” Hydrometallurgy, vol. 174, pp. 105–112, 2017, doi: 10.1016/j.hydromet.2017.09.004.
R. Singh, D. Haldar, and A. Patel, “Utilization of dolomite in magnesium production: A review on current status and future prospects,” J. Cleaner Prod., vol. 236, Art. no. 117604, 2019, doi: 10.1016/j.jclepro.2019.117604.
M. E. Pozin, Technology of Mineral Salts (Fertilizers, Pesticides, Industrial Salts, Oxides and Acids), 4th ed., pt. 1. Leningrad, USSR: Khimiya, 1974, 791 p.
Y. Kuroki, J. Shibata, and A. Iizuka, “Magnesium recovery from seawater and brine: Sustainable processes and future directions,” Sep. Purif. Technol., vol. 252, Art. no. 117460, 2020, doi: 10.1016/j.seppur.2020.117460.
E. G. Gordon, A. V. Korotchenko, N. I. Levchenko, A. M. Mitrokhin, O. A. Nikulin, I. E. Titova, T. G. Ugnovenok, and V. N. Fomina, “Method for obtaining micro- and/or nanometric magnesium hydroxide,” RU Patent 2422364, Bull. no. 18, 2011.
A. Alamdari, A. Rahimi, M. Askari, and H. Davoodi, “Magnesium compounds from dolomite: Kinetics and mechanism of dolomite decomposition,” Chem. Eng. Res. Des., vol. 111, pp. 384–392, 2016, doi: 10.1016/j.cherd.2016.05.023.
V. A. Khusnutdinov, T. G. Akhmetov, N. G. Tagiev, V. M. Gonyukh, A. V. Karnilov, A. L. Grigoryeva, and N. N. Vedernikov, “Method for obtaining magnesium hydroxide,” RU Patent 2069176, Bull. no. 32, Nov. 20, 1996.
C. Tang, W. Chen, and J. Wu, “Magnesium hydroxide nanoparticles: Synthesis, properties and applications,” J. Mater. Sci., vol. 53, pp. 13162–13174, 2018, doi: 10.1007/s10853-018-2421-9.
V. T. Antonov and V. O. Shablovsky, “Method for obtaining magnesium hydroxide,” EA Patent 2007/EA/0045VU, May 30, 2007.
T. V. Bondarchuk, O. V. Zhdanov, and S. V. Orlova, “Method for obtaining magnesium oxide,” RU Patent 2513652, Bull. no. 11, Apr. 20, 2014.
A. I. Saleh and A. M. Gritsishin, “Method for obtaining magnesium oxide from crystalline bischofite,” RU Patent 2379234, Bull. no. 2, Jan. 20, 2010.
M. A. Semenikhina, A. V. Vishnyakov, and V. A. Chashchin, “Interaction of magnesium hydroxide with solutions of metal salts forming sparingly soluble hydroxides,” Adv. Chem. Chem. Technol., no. 4, pp. 25–29, 2009.
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