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Potassium recovery from muscovite using NaCl-roasting followed by H_(2)SO_(4)-leaching 被引量:3
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作者 Sandeep Kumar JENA Baijayantimala MOHANTY +2 位作者 Geetikamayee PADHY Jogeshwara SAHU Sapan Kumar KANDI 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第6期1881-1894,共14页
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 process.The preliminary acid leaching studies applying differ... 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 process.The 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 potassium.The effects of various roasting and leaching parameters such as temperature,time,NaCl concentration,acid concentration,liquid-solid ratio on potassium extraction were evaluated.The 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 structure.The 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). 展开更多
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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作者 Afan Bagus Mananda Hiroyuki Harada +2 位作者 Hadi Imran A. Halem Yoshiharu Mitoma Fujita Keiko 《Journal of Materials Science and Chemical Engineering》 2021年第5期39-52,共14页
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... 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 CH<sub>3</sub>COOH. Treatment of 1:10 solid-liquid ratio with the help of 1 mol/l CH<sub>3</sub>COOH 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. 展开更多
关键词 BIOMASS Rice Husk Coffee potassium recovery Tartaric Acid
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