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potassium recovery from muscovite using NaCl-roasting followed by H_(2)SO_(4)-leaching

Journal of Central South University 2022年第6期29卷 1881-1894页

作者： Sandeep Kumar JENA Baijayantimala MOHANTY Geetikamayee PADHY Jogeshwara SAHU Sapan Kumar KANDI CSIR-Institute of Minerals and Materials Technology BhubaneswarOdisha-751013India

The present study aims at the recovery of potassium from muscovite mica(which contains K_(2)O;~10 wt%)using NaCl-roasting coupled with H_(2)SO_(4)-leaching *** preliminary acid leaching studies applying different mineral acids resulted in a potassium recovery of 8%−18%.The optimum leaching conditions for the maximum recovery were 4 mol/L H_(2)SO_(4),60 min leaching time and liquid-solid ratio 4 mL/g at 90℃.However,the roasting of muscovite with additive NaCl(muscovite:NaCl mass ratio of 1:1.00,900℃,45 min)followed by H_(2)SO_(4)-leaching(95℃,60 min)extracted potassium to the tune of 98%.Under similar roasting conditions,the H_(2)O-leaching process extracted only 60%of *** effects of various roasting and leaching parameters such as temperature,time,NaCl concentration,acid concentration,liquid-solid ratio on potassium extraction were *** appearance of the sylvite(KCl)mineral phase in the NaCl-roasted muscovite and its disappearance in the acid/water leached residue confirmed the physical and chemical distortions of the muscovite crystal *** possible mechanism of potassium release from the complex muscovite structure was elucidated based on available literature substantiated by characterizations using X-ray diffraction(XRD)and scanning electron microscopy with energy dispersive X-rays spectroscopy(SEM-EDX).

关键词： muscovite roasting acid leaching potassium recovery sylvite

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Study of potassium recovery from Biomass Ash Using Tartaric Acid and Syngenite Method

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Journal of Materials Science and Chemical Engineering 2021年第5期9卷 39-52页

作者： Afan Bagus Mananda Hiroyuki Harada Hadi Imran A. Halem Yoshiharu Mitoma Fujita Keiko Faculty of Environmental Science Prefectural University of Hiroshima Shobara Japan

Biomass has the potential and benefits of being an alternative energy source to replace fossil fuels that exist today in Indonesia and other tropical countries. In addition, biomass has an abundant stock or supply. By assessing the feasibility of recovering potassium, it is hoped that more potassium resources and in future Indonesia will be dependent on imported fertilizers and increase the agricultural industry, which is the aims of this study. The best extraction result is using CH3COOH. Treatment of 1:10 solid-liquid ratio with the help of 1 mol/l CH3COOH was chosen as the best treatment because it is more economically efficient. recovery of K with the help of tartaric acid and acetic acid resulted in a K recovery efficiency of around 94%. The optimal condition for the syngenite method is the addition of a magnesium dose of 5 mmol/l and at pH 11, the Ca: K ratio is 1:2.1 with 42% K. This can be a suggestion which method is more effective and efficient in recovery K.

关键词： Biomass Rice Husk Coffee potassium recovery Tartaric Acid

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