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首页> 外文期刊>Separation and Purification Technology >Cobalt(II) membrane-extraction by DP-8R/Exxsol D100 using pseudo-emulsion based hollow fiber strip dispersion (PEHFSD) processing
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Cobalt(II) membrane-extraction by DP-8R/Exxsol D100 using pseudo-emulsion based hollow fiber strip dispersion (PEHFSD) processing

机译：DP-8R / Exxsol D100使用基于伪乳液的中空纤维条分散液（PEHFSD）处理的钴（II）膜萃取

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摘要

The transport of cobalt(II) from acidic sulphate solutions through PEHFSD was investigated using the extractant DP-8R in Exxsol D100. The acidic feed solution containing Co(II) was passed through the tube side, and pseudo-emulsions of DP-8R/Exxsol D100 and sulphuric acid was passed through the shell side in counter-current mode, using a single microporous hydrophobic polypropylene hollow fiber contactor for extraction and stripping. In PEHFSD the aqueous strip (sulphuric acid) solution was dispersed in the organic membrane solution in a reservoir tank with an impeller stirrer to form a strip dispersion. This pseudo-emulsion phase is circulated from the tank to the membrane module to provide a constant supply of the carrier solution to the membrane micropores. Several hydrodynamic and chemical parameters, such as variation in feed pH (3-7), cobalt concentration in feed (0.17-1.7 x 10~(-3) M), carrier concentration (0.16-1.28 M), etc., were investigated. Mass transfer modelling was performed and the validity of the model was evaluated with experimental data. Moreover, the system was applied in the cobalt purification of synthetic lithium solutions derived from the processing of rechargeable batteries, with cobalt/lithium separation factor values around 25.
机译：使用Exxsol D100中的DP-8R萃取剂研究了酸性硫酸盐溶液中钴（II）通过PEHFSD的传输。使用单微孔疏水性聚丙烯中空纤维，将含Co（II）的酸性进料溶液通过管子侧，并将DP-8R / Exxsol D100和硫酸的假乳液以逆流模式通过壳侧。接触器，用于提取和剥离。在PEHFSD中，将带状水溶液（硫酸）分散在带有叶轮搅拌器的储罐中的有机膜溶液中，以形成带状分散体。该伪乳液相从罐循环到膜组件，以将载体溶液​​稳定地供应到膜微孔。研究了一些流体力学和化学参数，例如进料pH值（3-7）的变化，进料中钴浓度（0.17-1.7 x 10〜（-3）M），载体浓度（0.16-1.28 M）等。 。进行了传质建模，并用实验数据评估了模型的有效性。此外，该系统还应用于钴的纯化，该钴是从可充电电池的加工中提取出来的合成锂溶液，钴/锂的分离系数约为25。

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