Lithium and rubidium, as important alkali metals, have a wide range of applications in many fields because of their unique physical and chemical properties. This paper proposes a novel method for the extraction of lithium and rubidium from polylithionite. The process primarily involves alkaline leaching, solvent extraction of rubidium, lithium phosphate precipitation, and zeolite synthesis. Results of alkaline leaching experiments show that the leaching rates of lithium and rubidium are 96.43 and 97.50%, respectively, under a leaching temperature of 250 °C, an NaOH concentration of 600 g/L, a leaching duration of 3 h, and a liquid–solid ratio of 7:1 mL/g. Through solvent extraction, the extraction rate of rubidium can reach 99.5%. More than 93.96% of lithium can be recycled by adding phosphoric acid to prepare lithium phosphate. The obtained basic leaching residue is pretreated to synthesize zeolite, achieving reasonable utilization of the waste residue. The rational use of waste residue has added value to the process and promoted the sustainable use of resources.

中文翻译：

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碱浸结合溶剂萃取-沉淀法从多锂铁矿中高效提取锂和Rub

锂和id作为重要的碱金属，由于其独特的物理和化学性质而在许多领域中具有广泛的应用。本文提出了一种从多锂铁矿中提取锂和rub的新方法。该过程主要包括碱浸、,的溶剂萃取，磷酸锂沉淀和沸石合成。碱浸实验结果表明，在250℃浸出温度，600g / L NaOH浓度，3h浸出时间和液体浸出条件下，锂和rub的浸出率分别为96.43％和97.50％。 –固体比为7：1 mL / g。通过溶剂萃取，id的萃取率可达到99.5％。通过添加磷酸可制备磷酸锂，可回收93.96％以上的锂。对获得的碱性浸出残渣进行预处理以合成沸石，从而合理利用废渣。合理利用废渣增加了工艺价值，促进了资源的可持续利用。