Study on Recovery of Rubidium and Cesium from Rubidium-Cesium Alum, a By-product of Lithium Extraction from Lepidolite AITranslate
Abstract AITranslate
A method for recovering rubidium and cesium was proposed from rubidium-cesium alum, a by-product of lithium extraction from lepidolite.The rubidium-cesium alum was leached with sodium hydro-xide, and the effects of sodium hydroxide concentration, liquid-solid ratio and leaching time on the leaching rate of rubidium and cesium were investigated.The results show that the leaching rate of rubidium-cesium is above 99% under the optimized leaching conditions of leaching temperature 25 ℃,NaOH solution concentration 1.5 mol/L,liquid to solid ratio 8∶1,and leaching time 40 min.Rubidium-cesium was extracted from alkaline leaching solution with t-BAMBP,and the four-stage countercurrent extraction was carried out under the conditions of temperature 25 ℃,pH=13.75,Ct-BAMBP=0.6 mol/L,O/A=1.5∶1 and extraction time 5 min.The extraction rates of rubidium and cesium are respectively over 92% and 99.9%,only 1.53% K impurity is extracted, and the elements of Li, Na, Al are not extracted.The loaded organic phase is washed and selectively stripped for rubidium and cesium, and the obtained rubidium chloride and cesium chloride solutions have purity of more than 92% and 98%,respectively.The rubidium in the washing solution is recovered and enriched, and the rubidium chloride solution with a concentration of 21 g/L and a purity of more than 98% is obtained.
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DOI：
Chinese Library Classification Number:TF826[冶金工程—有色金属冶金]
Citation Information:
A method for recovering rubidium and cesium was proposed from rubidium-cesium alum, a by-product of lithium extraction from lepidolite.The rubidium-cesium alum was leached with sodium hydro-xide, and the effects of sodium hydroxide concentration, liquid-solid ratio and leaching time on the leaching rate of rubidium and cesium were investigated.The results show that the leaching rate of rubidium-cesium is above 99% under the optimized leaching conditions of leaching temperature 25 ℃,NaOH solution concentration 1.5 mol/L,liquid to solid ratio 8∶1,and leaching time 40 min.Rubidium-cesium was extracted from alkaline leaching solution with t-BAMBP,and the four-stage countercurrent extraction was carried out under the conditions of temperature 25 ℃,pH=13.75,Ct-BAMBP=0.6 mol/L,O/A=1.5∶1 and extraction time 5 min.The extraction rates of rubidium and cesium are respectively over 92% and 99.9%,only 1.53% K impurity is extracted, and the elements of Li, Na, Al are not extracted.The loaded organic phase is washed and selectively stripped for rubidium and cesium, and the obtained rubidium chloride and cesium chloride solutions have purity of more than 92% and 98%,respectively.The rubidium in the washing solution is recovered and enriched, and the rubidium chloride solution with a concentration of 21 g/L and a purity of more than 98% is obtained.
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| GB/T 7714-2015 | [1] LU Ao-lin, ZHANG Gui-qing, ZENG Li. Study on Recovery of Rubidium and Cesium from Rubidium-Cesium Alum, a By-product of Lithium Extraction from Lepidolite[J]. Rare Metals and Cemented Carbides, 2022(1): 16-22. |
| MLA | [1] LU Ao-lin, et al., "Study on Recovery of Rubidium and Cesium from Rubidium-Cesium Alum, a By-product of Lithium Extraction from Lepidolite." Rare Metals and Cemented Carbides, no. 1, 2022, pp. 16-22. |
| APA | [1] LU Ao-lin, ZHANG Gui-qing, & ZENG Li. (2022). Study on Recovery of Rubidium and Cesium from Rubidium-Cesium Alum, a By-product of Lithium Extraction from Lepidolite. Rare Metals and Cemented Carbides(1), 16-22. |
| IEEE | [1] LU Ao-lin, ZHANG Gui-qing, and ZENG Li, "Study on Recovery of Rubidium and Cesium from Rubidium-Cesium Alum, a By-product of Lithium Extraction from Lepidolite," Rare Metals and Cemented Carbides, no. 1, pp. 16-22, 2022. keywords: {lepidolite;lithium extraction;rubidium-cesium alum;rubidium;cesium;recovery;NaOH lea-ching;solvent extraction} |