A STUDY ON THE CONTINUOUS CONCENTRATION PROCESS WITH LIQUID SURFACTANT MEMBRANE TECHNIQUE IN A COUNTERCURRENT CONTACT COLUMN

1.提出了苯酚在液膜中的传质模型。根据该模型，可以从操作条件和（W/O）乳液滴和内部水滴的直径估计用于渗透速率的计算机模拟所需的所有参数。该模型对不同条件下的批料渗透实验结果进行了满意的预测.采用搅拌槽在不同条件下进行了LIX 64 N对铜离子和D2 EHPA对锌离子的间歇渗透浓缩实验。将实验结果与文献[1]中提出的传质模型进行了扩展，并与实验结果进行了比较。金属离子的渗透。发现该模型可以应用于液态表面活性剂膜对金属离子的渗透.应用连续相轴向分散模型和（W/O）乳状液分散相传质模型，模拟了逆流接触塔中螯合萃取剂连续富集二价金属离子的过程。考察了操作参数对柱内浓度分布的影响。很明显，控制连续相中的pH值对于有效操作非常重要，并且可以模拟之前报道的观察到的浓度分布。4.研制了一套用于表面活性剂液膜分离过程的W/O乳状液连续破乳装置。结果表明，该乳状液具有较好的破乳效果，在乳状液进料速率等于破乳速率的条件下，破乳速率的平方与外加电位成正比，与电极间距无关。

1. A mass transfer model for the permeation of phenol by liquid srufactant membrane was proposed. According to the model, all parameters required for a computer simulation for the permeation rate can be estimated from operating conditions and diameters fo (W/O) emulsion drops and internal water droplets. The model satisfactorily predicts experimental results for the batch permeation measured at various conditions.2. Batch permeation and concentration experiments of copper ion by LIX64N and zinc ion by D2EHPA were carried out using a stirred tank at various conditions. The experimental results were compared with the results computed by extending the mass transfer model proposed in 1. to the permeation of metal ions. It was found that the model can be applied to the permeation of metal ions by liquied surfactant membranes.3. The continuous concentration process of divalent metal ions by chelate extractants in a countercurrent contact column was simulated by applying an axial dispersion model for a continuous phase and the above mass transfer model for a dispersed phase of (W/O) emulsion. The effect of operating parameters on the concentration profiles in the colunm was examined. It became clear that the control of pH in the continuous phase is very important for the efficient operation and the observed concentration profiles reported before can be simulated.4. A continuous demulsification equipment applying high DC electric potential to W/O emulsion passing between two parallel perforated copper electrodes was produced for the separation process by the liquid surfactant membrane technique. It was shown that the emulsions are demulsified well, and at the condition when the feed rate of emulsion is equal to the demulsification rate, the square of the demulsification rate increases in proportion to the applied potential and is independent of the distance between two electrodes.