Neodymium (Nd), dysprosium (Dy), and iron (Fe) were recovered from spent mobile phone camera modules via leaching and a solvent extraction procedure. Nd, Dy, and Fe, together with other minor metal ions in the pretreated spent mobile phone camera modules, were dissolved using an HNO₃ solution. The leaching parameters, such as concentration of lixivant, reaction temperature, pulp density, which possibly affect the dissolution efficiency of metal ions, were investigated. From the obtained leachate containing Nd, Dy, Fe, Ni, Co, and B, Nd and Dy, with a small amount of Fe, were extracted using 0.5 mol/L of trioctylphosphine oxide (TOPO). Selective stripping of Nd and Dy from the loaded TOPO was achieved using 3 mol/L hydrochloric acid. After removing Nd and Dy from the leachate, Fe was extracted using 1 mol/L of TOPO followed by stripping with oxalic acid. McCabe-Thiele diagrams for the extraction and stripping of Nd/Dy and Fe were constructed. The results were validated via counter-current simulation experiments using a real leachate solution. Finally, an integrated process for recovery of Nd, Dy, and Fe from the nitric acid leachate of spent mobile phone camera modules was proposed.

通过浸出和溶剂萃取程序从废旧手机相机模块中回收钕（Nd），（Dy）和铁（Fe）。使用HNO ₃溶解了预处理过的废手机摄像头模块中的Nd，Dy和Fe以及其他微量金属离子解。研究了可能影响金属离子溶解效率的浸出参数，如助剂浓度，反应温度，纸浆密度。使用0.5 mol / L的三辛基氧化膦（TOPO）从所得的含Nd，Dy，Fe，Ni，Co和B的浸出液中提取Nd和Dy和少量的Fe。使用3 mol / L盐酸可选择性地从负载的TOPO中去除Nd和Dy。从渗滤液中除去Nd和Dy后，用1 mol / L的TOPO提取铁，然后用草酸汽提。构造了Nd / Dy和Fe的萃取和汽提的McCabe-Thiele图。通过使用实际浸出液的逆流模拟实验验证了结果。最后，是用于回收Nd，Dy，