Ayo F. Balogun, Alafara A. Baba, Taiwo O. Ogundepo, Joel E. Akor
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Preparation and characterization of potassium chloride from the roast-leaching treatment of a Nigerian quartz-rich muscovite ore
This study extracts potassium from quartz-rich muscovite ore via roast-leaching, employing CaCl2 derived from periwinkle shells as additives. Various analytical and spectral techniques, including XRD, XRF, and SEM, were utilized for characterization throughout the research. The impact of experimental parameters such as CaCl2 salt quantities, roasting temperature, leaching duration, and particle size on potassium extraction was thoroughly investigated. Under established conditions (ore to salts mass ratio of 1:5, temperature of 850 °C, particle size − 63 + 56 µm), 99.7% of the potassium was dissolved within 30 min. The roast-leaching process exhibited a reaction order of 1.178, and the estimated activation energy of 33.78 kJ/mol suggested a diffusion-controlled reaction through the product layer as the rate-limiting step for potassium extraction. The multiple regression analysis supports the data reported. To selectively recover potassium from the leach liquor, sodium perchlorate was introduced to precipitate potassium as KClO4, subsequently thermally decomposed to yield high-purity potassium chloride. This innovative approach demonstrates a sustainable and cost-effective method for potassium recovery from its ore.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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