Extraction of bismuth from a Nigerian bismutite ore: an integrated selective leaching and precipitation approach

IF 1.7 4区化学 Q4 CHEMISTRY, PHYSICAL

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2026-02-09 DOI:10.1007/s11144-026-03034-y

Ayo F. Balogun, Alafara A. Baba

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引用次数: 0

Abstract

This study presents an efficient approach for extracting bismuth from bismutite ore containing bismutite (Bi_4.00C_2.00O_10.00: 96-900-1634) and zinnwaldite (KAl(FeLi)(Si₃Al)O₁₀F₂: 00-041-1482) using an acidic chloride medium, followed by the hydrolytic separation of bismuth as Bismuth oxychloride (BiOCl). Experimental results showed that bismuth was selectively leached with high efficiency, while orthoclase remained in the residue, as verified by XRD analysis. The effects of key leaching parameters such as CaCl₂ concentration, temperature, and reaction time were systematically evaluated, with optimized conditions yielding a bismuth leaching efficiency of 94.90%. Sodium hydroxide (NaOH) treatment enabled the quantitative precipitation of BiOCl, with XRD confirming high phase purity (PDF No. 00-006-0249), indicating its potential as a precursor for pharmaceutical and supercapacitor applications. Feasibility assessment confirmed both the technical robustness of the process and the commercial viability of the product.

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从尼日利亚铋矿中提取铋：综合选择性浸出和沉淀方法

本研究提出了一种从含铋矿（Bi4.00C2.00O10.00: 96-900-1634）和锌瓦尔石(KAl（FeLi)(Si3Al)O10F2: 00-041-1482）的铋矿中提取铋的高效方法，然后将铋水解分离为氧化氯化铋（BiOCl）。实验结果表明，铋具有较高的选择性浸出效率，而渣中仍残留着正长石，XRD分析证实了这一点。系统评价了CaCl2浓度、温度、反应时间等关键浸出参数的影响，优化后的浸出铋效率为94.90%。氢氧化钠（NaOH）处理使BiOCl能够定量沉淀，XRD证实了高相纯度（PDF No. 00-006-0249），表明其作为制药和超级电容器前体的潜力。可行性评估确认了工艺的技术稳健性和产品的商业可行性。

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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.