Research and analysis of mass transfer model for liquid-liquid phase dispersion extraction

被引：0
|
作者：
Li, Gen [1 ]
Ye, Shi-Chao [1 ]
Zhang, Ze-Guang [1 ]
Ma, Yan-Long [1 ]
机构：
[1] College of Chemical Engineering, Sichuan University, Chengdu
来源：
Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2015年 / 29卷 / 06期
关键词：
Extraction efficiency; Mass transfer coefficient; Micro extraction; Micro extraction mass transfer model;
D O I：
10.3969/j.issn.1003-9015.2015.06.007
中图分类号：
学科分类号：
摘要：
The system of water/phosphoric acid/TBP+kerosene was used to study the effects of flow rate, phosphate content, the content of diluent, droplet diameter and residence time on the liquid-liquid phase micro extraction, and to find out the suitable operation conditions. Results show that the extraction efficiency tends to increase with increasing mass fraction of phosphoric acid and residence time, and increases with the decrease of diluent content, while the extraction efficiency increases at first and then decreases with increasing flow rate. Reasonably increasing the mass fraction of phosphoric acid, decreasing diluent content and shorten the residence time can enhance mass transfer coefficient. The smaller the droplet diameter, the larger the mass transfer coefficient, its highest value can up to 1.997×10-4 m×s-1. Micro disperse state of liquid-liquid extraction process was analyzed. According to the laws of diffusion and mass transfer, a mathematical model of concentration distribution inside the liquid drop was established, and a formula for calculating the extraction efficiency was proposed. The errors between the results calculated by the proposed model and the experimental data keep well within 20%. The experimental results of this study can be served as the guidance for the industrial design and operation of micro extraction. © 2015, Editorial Board of Journal of Chemical Engineering of Chinese Univesities". All right reserved."
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页码：1325 / 1332
页数：7
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