For the first time, Dysprosium was extracted by the novel method of emulsion liquid membrane in a pulsed packed column in a continuous process. Emulsion liquid membrane (ELM) was comprised of D2EHPA (di-2-ethylhexylphosphoric acid) as carrier and Span 80 (Polysorbate 80) as the surfactant in kerosene as the diluent and nitric acid as internal phase. In this work, the packed column was characterized from a hydrodynamic point of view including flooding condition and holdup at flooding points. Operational parameters affecting the flooding points, such as pulsation intensity and flow rate of continuous and dispersed phases have been studied. It was found that increase in pulsation intensity up to 1.5 cm/s and phases flow ratio up to 1.5 cause the reduction of the maximum throughput of the column. Furthermore, two new empirical correlations are proposed for the prediction of holdup at flooding points and flooding velocities with a mean deviation of 2.92% and 1.37%, respectively. The results also demonstrate that about 99.7% of Dysprosium was extracted under specific conditions. Also, recovered membrane phase showed an extraction efficiency that was as high as the fresh membrane phase. These results confirmed the possibility of applying of an ELM for continuous extraction of Dysprosium.

首次在脉冲填充柱中采用乳化液膜法连续提取镝。乳化液膜（ELM）由作为载体的 D2EHPA（二-2-乙基己基磷酸）和作为表面活性剂的 Span 80（聚山梨酯 80）在煤油中作为稀释剂和硝酸作为内相组成。在这项工作中，填料塔从流体动力学的角度进行了表征，包括溢流条件和溢流点的滞留率。已经研究了影响泛点的操作参数，例如脉动强度和连续相和分散相的流速。结果表明，脉动强度增加到 1.5 cm/s 和相流量比增加到 1.5 会导致色谱柱的最大通量降低。此外，提出了两个新的经验相关性，用于预测洪水点的持水率和洪水速度，平均偏差分别为 2.92% 和 1.37%。结果还表明，在特定条件下提取了约 99.7% 的镝。此外，回收的膜相显示出与新鲜膜相一样高的提取效率。这些结果证实了应用 ELM 连续提取镝的可能性。