Separation and Purification of Cesium from High-Rubidium Solution by Zinc Ferrocyanide

IF 1.5 4区工程技术 Q3 METALLURGY & METALLURGICAL ENGINEERING

Mining, Metallurgy & Exploration Pub Date : 2024-03-07 DOI:10.1007/s42461-023-00813-2

Xie Junjie, Li Kang, Shi Zhuonan, Min Changli, Li Shina, Yin Zichen, Ma Ruixin

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Abstract

Cesium and rubidium were effectively separated by zinc ferrocyanide coprecipitation method, and the effect of precipitant addition amount on the separation of cesium and rubidium was studied. Under the conditions of Zn/Cs molar ratio of 0.45 and Zn/Fe molar ratio of 1, the precipitation rate of cesium is 84.01% and the separation factor of Cs/Rb is 164.65. The thermogravimetric curves of the sediment were measured, and the effects of roasting temperature, roasting time, and leaching liquid/solid ratio on the extraction of cesium were studied. Almost all of the cesium was extracted under optimal conditions: roasting temperature of 600 °C, roasting time of 3 h, leaching temperature of 25 °C, leaching time of 0.5 h, and liquid/solid ratio of 5:1 mL/g. After the leaching process, the leach liquor with high concentration of cesium of 80.17 g/L was obtained. Finally, the leach liquor was further purified by solvent extraction, and the purity of the cesium chloride product reached 99.66%.

Graphical Abstract

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用亚铁氰化锌从高铷溶液中分离和提纯铯

采用亚铁氰化锌共沉淀法有效分离了铯和铷，并研究了沉淀剂加入量对铯和铷分离的影响。在 Zn/Cs 摩尔比为 0.45 和 Zn/Fe 摩尔比为 1 的条件下，铯的沉淀率为 84.01%，铯/铷的分离系数为 164.65。测量了沉淀物的热重曲线，研究了焙烧温度、焙烧时间和浸出液/固比对铯提取的影响。在焙烧温度为 600 ℃、焙烧时间为 3 h、浸出温度为 25 ℃、浸出时间为 0.5 h、液固比为 5:1 mL/g 的最佳条件下，几乎所有的铯都被提取出来。浸出过程结束后，得到铯浓度高达 80.17 g/L 的浸出液。最后，浸出液经溶剂萃取进一步提纯，氯化铯产品的纯度达到 99.66%。

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来源期刊

Mining, Metallurgy & Exploration Materials Science-Materials Chemistry

CiteScore

3.50

自引率

10.50%

发文量

177

期刊介绍： The aim of this international peer-reviewed journal of the Society for Mining, Metallurgy & Exploration (SME) is to provide a broad-based forum for the exchange of real-world and theoretical knowledge from academia, government and industry that is pertinent to mining, mineral/metallurgical processing, exploration and other fields served by the Society. The journal publishes high-quality original research publications, in-depth special review articles, reviews of state-of-the-art and innovative technologies and industry methodologies, communications of work of topical and emerging interest, and other works that enhance understanding on both the fundamental and practical levels.