Preparation and characterization of potassium chloride from the roast-leaching treatment of a Nigerian quartz-rich muscovite ore

IF 1.7 4区化学 Q4 CHEMISTRY, PHYSICAL

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-06-28 DOI:10.1007/s11144-024-02678-y

Ayo F. Balogun, Alafara A. Baba, Taiwo O. Ogundepo, Joel E. Akor

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Abstract

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.

Graphical Abstract

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尼日利亚富含石英的麝香石矿经焙烧-浸出处理后氯化钾的制备和特性分析

本研究采用从长春花壳中提取的 CaCl2 作为添加剂，通过焙烧浸出法从富含石英的麝香石矿中提取钾。在整个研究过程中采用了各种分析和光谱技术，包括 XRD、XRF 和 SEM。对 CaCl2 盐量、焙烧温度、浸出时间和粒度等实验参数对钾提取的影响进行了深入研究。在既定条件下（矿石与盐的质量比为 1:5，温度为 850 °C，粒度为 63 + 56 µm），99.7% 的钾在 30 分钟内被溶解。焙烧-浸出过程的反应阶数为 1.178，估计活化能为 33.78 kJ/mol，这表明通过产物层的扩散控制反应是钾提取的限速步骤。多元回归分析支持所报告的数据。为了从浸出液中选择性地回收钾，引入了高氯酸钠以 KClO4 的形式沉淀钾，随后进行热分解，生成高纯度的氯化钾。这种创新方法展示了一种从矿石中回收钾的可持续且具有成本效益的方法。

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来源期刊

Reaction Kinetics, Mechanisms and Catalysis CHEMISTRY, PHYSICAL-

CiteScore

3.30

自引率

5.60%

发文量

201

审稿时长

2.8 months

期刊介绍： Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields: -kinetics of homogeneous reactions in gas, liquid and solid phase; -Homogeneous catalysis; -Heterogeneous catalysis; -Adsorption in heterogeneous catalysis; -Transport processes related to reaction kinetics and catalysis; -Preparation and study of catalysts; -Reactors and apparatus. Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.