As an indispensable raw material for green energy, securing an adequate supply of lithium has become a worldwide policy. However, the difficult separation of the homologous elements lithium and potassium severely hinders the efficient extraction of lithium from lithium minerals. Current research provides an industrialization promising technology, the highly selective precipitation of potassium through the jarosite process, for the separation of potassium from lithium-bearing solution. The conditions for precipitating potassium in the jarosite process without or with seed were optimized. Results showed the precipitation ratios of potassium and lithium at optimized conditions are 99.17 % and 0.43 %, respectively, corresponding to a selectivity coefficient (${\text{S}}_{\text{K}}^{\text{Li}}$) as high as $28.00\times {10}^3$. The effectiveness of the jarosite process in selective precipitating potassium is barely influenced by the initial concentrations of lithium and potassium. Adding seed enables the separation of lithium and potassium at lower temperatures with a faster speed in a broader pH range. Compared to some other separation technologies, both the jarosite process without or with seed can achieve significantly higher ${\text{S}}_{\text{K}}^{\text{Li}}$ in a shorter time. Overall, the jarosite process is an effective and commercially promising technology for separating potassium from lithium-bearing solution, favoring the sustainability of the lithium industry.

作为绿色能源不可或缺的原材料，确保充足的锂供应已成为全球政策。然而，同系元素锂和钾的分离困难严重阻碍了从锂矿物中有效提取锂。目前的研究提供了一种具有工业化前景的技术，即通过黄钾铁矾工艺高选择性沉淀钾，用于从含锂溶液中分离钾。优化了黄钾铁矾工艺中有或无晶种沉淀钾的条件。结果表明，优化条件下钾和锂的析出率分别为99.17 %和0.43 %，对应的选择性系数为（${\text{小号}}_{\text{钾}}^{\text{李}}$） 高达$28.00\times {10}^{\mathrm{3个}}$. 黄钾铁矾工艺在选择性沉淀钾方面的有效性几乎不受锂和钾初始浓度的影响。添加种子可以在较低温度下以更快的速度在更宽的 pH 范围内分离锂和钾。与其他一些分离技术相比，无晶种和有晶种的黄钾铁矾工艺都可以达到显着更高的分离效果。${\text{小号}}_{\text{钾}}^{\text{李}}$在更短的时间内。总的来说，黄钾铁矾工艺是一种从含锂溶液中分离钾的有效且具有商业前景的技术，有利于锂工业的可持续发展。