The fusion of the leaching and purification processes was realized by directly using microemulsion as the leaching agent. The bis-(2-ethyhexyl) phosphoric acid (DEHPA)/n-heptane/NaOH microemulsion system was established to directly leach vanadates from sodium-roasted vanadium slag. The effect of the leaching agent on the leaching efficiency was investigated, in addition to the molar ratio of H₂O/NaDEHP (W), DEHPA concentration, solid/liquid ratio, stirring time, and leaching temperature. In optimal situations, the vanadium leaching efficiency reaches 79.57%. The X-ray diffraction characterization of the leaching residue and the Raman spectrum of the microemulsion before and after leaching demonstrate the successful entry of vanadates from the sodium-roasted vanadium slag into the microemulsion. The proposed method successfully realizes the leaching and purification of vanadates in one step, thereby greatly reducing production costs and environmental pollution. It also offers a new way to achieve the green recovery of valuable metals from solid resources.

直接采用微乳液作为浸出剂，实现了浸出与提纯过程的融合。建立了双(2-乙基己基)磷酸(DEHPA)/正庚烷/NaOH微乳液体系以直接从钠焙烧钒渣中浸出钒酸盐。除了H ₂ O/NaDEHP ( W)的摩尔比外，还研究了浸出剂对浸出效率的影响。)、DEHPA 浓度、固液比、搅拌时间和浸出温度。在最佳情况下，钒浸出效率达到79.57%。浸出渣的 X 射线衍射表征和浸出前后微乳液的拉曼光谱表明，钒酸盐从钠焙烧钒渣中成功进入微乳液。该方法成功地实现了钒酸盐的一步浸提提纯，大大降低了生产成本和环境污染。它还提供了一种从固体资源中实现有价金属的绿色回收的新途径。