Abstract
The process of obtaining silicon dioxide upon the interaction of fluorosilicic acid with an aqueous solution of ammonia is studied. The fluorine-containing compounds in synthesized dioxide are identified by 19F NMR spectroscopy. It is shown that the two-stage method of precipitation followed by washing, allows producing silicon dioxide with a fluorine content of units of ppm.
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Original Russian Text © G.P. Panasyuk, L.A. Azarova, V.I. Privalov, V.N. Belan, I.G. Voroshilov, L.K. Shpigun, 2017, published in Khimicheskaya Tekhnologiya, 2017, Vol. 18, No. 3, pp. 99–104.
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Panasyuk, G.P., Azarova, L.A., Privalov, V.I. et al. Preparation of Silicon Dioxide with a Fixed Content of Fluorine from Fluorosilicic Acid. Theor Found Chem Eng 52, 607–611 (2018). https://doi.org/10.1134/S0040579518040231
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DOI: https://doi.org/10.1134/S0040579518040231