Interaction between Tuff and Calcium Hydroxide under Hydrothermal Conditions for Obtaining a Potash Fertilizer

Interaction between Tuff and Calcium Hydroxide under Hydrothermal Conditions for Obtaining a Potash Fertilizer

The interaction between dacitic tuff and calcium hydroxide under hydrothermal conditions has been investigated. At a ratio of CaO/SiO 2 = 0.3–1.5 : 1 and at a ratio between the liquid phase and the solid phase amounting to 10 : 1, after 2 h at 220°C, calcium hydroxide is completely bound. As a resul...

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Veröffentlicht in:Theoretical foundations of chemical engineering 2020-07, Vol.54 (4), p.706-709
Hauptverfasser: Grigoryan, K. G., Baginova, L. G., Khachatryan, A. A., Ayrapetyan, S. M., Arutyunyan, G. A., Kostanyan, A. K., Aznauryan, A. N.
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Liquid phases
Potash
Potassium
Potassium carbonate
Silicon dioxide
Slaked lime
Solid phases
Technology of Inorganic Substances and Materials
Tuff
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Zusammenfassung:The interaction between dacitic tuff and calcium hydroxide under hydrothermal conditions has been investigated. At a ratio of CaO/SiO 2 = 0.3–1.5 : 1 and at a ratio between the liquid phase and the solid phase amounting to 10 : 1, after 2 h at 220°C, calcium hydroxide is completely bound. As a result of the destruction of potassium feldspar in tuff, potassium can be transformed into a plant-digestible form.
ISSN:0040-5795
1608-3431
DOI:10.1134/S0040579519050075