Писаренко, С. В., Камінський, О. М., Чигиринець, О. Е., Денисюк, Р. О., Анічкіна, О. В., Черненко, В. Ю. (2023) Kinetics of alkaline leaching process of Titanium(IV) from Ilmenite. Journal of Chemical Technology and Metallurgy, 58 (6). с. 1146-1152. ISSN 1314-7471
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The article deals with the kinetics process of alkaline leaching of ilmenite from the Irshan deposit; the prospects of obtaining potassium titanate in comparison with sodium titanate are presented. Using the methods of X-ray diffraction and electron microscopy, it has been studied that potassium and sodium titanates, obtained by the method of alkaline melting from ilmenite concentrate, correspond to the structures described in the reference literature. The degree of extraction depends on the time of interaction of ilmenite with sodium and potassium hydroxides, and the optimal kinetic conditions are determined. We have established that during alkaline leaching of titanium(IV) with potassium hydroxide, in the temperature range of 453 K - 533 K, the maximum degree of extraction is 86 % - 89 %. It is shown that the dependence “degree of transformation - time of isothermal interaction” is best described by the “compressed sphere” model. From the temperature dependences of the potassium titanate leaching process, the activation energy has been calculated, which is 22 kJ mol-1, which may indicate a kinetic regime with a low activation energy, where the limiting stage is the chemical interaction between the melt components.
| Тип елементу : | Стаття |
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| Ключові слова: | ilmenite, alkaline leaching, sodium titanate, potassium titanate, chemical kinetics |
| Теми: | Q Наука > QD Хімія T Технологія > TP Хімічна технологія |
| Підрозділи: | Природничий факультет > Кафедра хімії |
| Користувач, що депонує: | асистент Сніжана Писаренко |
| Дата внесення: | 04 Вер 2023 09:24 |
| Останні зміни: | 04 Вер 2023 09:24 |
| URI: | http://eprints.zu.edu.ua/id/eprint/37844 |
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