Rubidium is a critical mineral due to its important role in the rubidium atomic clock in global positioning systems. In our previous study, lithium, rubidium, cesium were extracted simultaneously from lepidolite by a sulfuric acid baking process; a sulfate solution with 10.26 g/L-Rb⁺ and 40.74 g/L-K⁺ was obtained after recovery of lithium and cesium. As the continuity of this research, solvent extraction was used to separate rubidium from the above solution with high concentrations of Rb⁺ and K⁺ in this study. An organic phase with 1 mol/L 4-tert-butyl-2-(α-methylbenzyl)-phenol was introduced to extract the rubidium. The Rb⁺ extraction efficiency reached 97.02%, with 17.28% K⁺ co-extracted after a four-stage countercurrent extraction. The rubidium-loaded organic phase was then scrubbed with water, and the scrubbing efficiency of the potassium was 96.17%, with 7.25% of rubidium lost. After potassium scrubbing, a potassium-depleted organic phase with 3.2 g/L-Rb⁺ and 0.093 g/L-K⁺ was obtained. Almost all the rubidium could be stripped from the organic phase using 0.1 mol/L sulfuric acid. A rubidium sulfate product with a purity of 98.17 wt.% was obtained by evaporation and crystallization of the stripping solution. Finally, an integrated process for recovery of lithium, cesium, and rubidium from lepidolite was proposed.

由于its在全球定位系统中的atomic原子钟中起着重要作用，因此is是一种重要的矿物。在我们以前的研究中，通过硫酸焙烧工艺同时从锂云母中提取了锂，rub，铯。回收锂和铯后，得到硫酸盐溶液，其硫酸盐溶液的浓度为10.26 g / L-Rb ⁺和40.74 g / LK ⁺。作为这项研究的连续性，在本研究中，使用溶剂萃取从上述溶液中分离出with，其中含有高浓度的Rb ⁺和K ⁺。引入具有1mol / L的4-叔丁基-2-（α-甲基苄基）-苯酚的有机相以提取the。Rb ⁺提取效率达到97.02％，其中K ⁺为17.28％四阶段逆流萃取后共萃取。然后用水洗涤负载rub的有机相，钾的洗涤效率为96.17％，损失了7.25％的.。洗涤钾后，获得具有3.2 g / L-Rb ⁺和0.093 g / LK ⁺的贫钾有机相。使用0.1 mol / L硫酸可以将几乎所有the从有机相中汽提。通过汽提溶液的蒸发和结晶，获得纯度为98.17重量％的硫酸rub产物。最后，提出了从锂云母中回收锂，铯和rub的综合方法。