The accumulation of alkali metals in cryolite electrolyte has negative impacts on the operation of aluminum electrolysis, and part of electrolytes need to be periodically replaced and discharged. A cleaner and efficient process was proposed to recover LiF and Al₂(SO₄)₃ from the waste cryolite electrolyte. Under the optimum sulfated roasting conditions, 87.55% of Li and 30.30% of Al were leached. The obtained cryolite residue with a low molecular ratio could be returned to the aluminum electrolysis system. The addition of sodium benzoate achieved the efficient separation of Al³⁺ from Li-containing leachate, and the Al precipitation ratio was 99.78%. Acid leaching of the aluminum precipitate regenerated benzoic acid and recovered 99.62% of Al₂(SO₄)₃. Finally high-purity cubic LiF was prepared from Li₂SO₄ solution, and the recovery of LiF was 98.78%.

冰晶石电解液中碱金属的积累对铝电解的运行产生不利影响，部分电解液需要定期更换和排放。提出了一种从废冰晶石电解液中回收 LiF 和 Al ₂ (SO ₄ ) _{3 的清洁高效工艺。}在最佳硫酸化焙烧条件下，87.55%的锂和30.30%的铝被浸出。得到的低分子比冰晶石残渣可返回铝电解系统。苯甲酸钠的加入实现了Al ^{3+的高效分离}从含锂渗滤液中提取，Al析出率为99.78%。铝沉淀物的酸浸再生苯甲酸并回收99.62%的Al ₂ (SO ₄ ) ₃。_{最后由Li 2} SO ₄溶液制备出高纯立方LiF ，LiF的回收率为98.78%。