乳化液膜提取Cu^(2+)的扩散—反应传质模型  

Diffusion-reaction mass transfer model for Cu^(2+) extracting using liquid emulsion membrane

作　　者：王文才[1] 黄万抚[2] 蔡嗣经[3] 

机构地区：[1]内蒙古科技大学 [2]江西理工大学 [3]北京科技大学

出　　处：《黄金》2006年第3期44-47,共4页Gold

基　　金：江西省主要学科学术和技术带头人培养对象资助项目

摘　　要：在乳化液膜提取Cu2+传质过程合理假设的条件下,以Cu2+络合物的扩散以及Cu2+与载体的络合反应共同控制传质过程为特征,综合考虑了膜相阻力、络合反应以及释放反应等因素对传质的影响,并根据传质学理论和Fick第一扩散定律,提出了乳化液膜提取Cu2+的扩散—反应传质模型。分析和实验表明,对于膜相组成和操作条件一定的乳化液膜体系而言,在提取时间不是很长时,该模型的萃取反应常数z0具有常数性,z0的常数性使得该模型更加简单、适用。在提取时间为5~20m in时,该模型计算的M6401-L113B-煤油-H2SO4乳化液膜体系Cu2+的提取率与实验测定值吻合较好。A diffusion-reaction mass transfer model for liquid emulsion membrane extracting Cu^2＋ in the reasonable mass transfer assumption is presented based on the mass transfer theory and Fick law of first diffusion. The process of mass transfer in this model is controlled by the diffusion of complex Cu^2＋ compound and complex reaction of transferring Cu^2＋ and carrier. The resistance of membrane phase, complex reaction, exchange reaction and other factors are considered compositely. The analysis and experiment show that the extracting reaction parameter z0 is a constant. Therefore, the model is simple but practical due to the constant character of the extracting reaction parameter %. For the liquid emulsion membrane composed of M6401-L213B-kerosene-H2SO4, the calculated extracting rate of Cu^2＋ using this model is well consistent with the experimental results when the extracting time is between 5 to 20 minutes.

关 键 词：乳化液膜 提取 铜 传质模型 

分 类 号：TQ028.8[化学工程]