Kinetic Studies for the Extraction of Chromium （Ⅵ） from Hydrochloric Acid Solution with Tri-n-octylamine

论文摘要

Kinetic studies of the extraction of chromium（Ⅵ）[Cr（Ⅵ）] from the hydrochloric acid solution with tri-n-octylamine（N235） have been made by a Lewis cell. The influences of various kinetic parameters, such as stirring rate, interfacial area, temperature, N235 and initial Cr（Ⅵ） concentrations were evaluated. The rate equations for the extraction of Cr（Ⅵ） by N235 were obtained on the basis of the slope analysis data. The results indicated that the reaction rate of Cr（Ⅵ） increased with increasing of the stirring rate and interfacial area until that a "plateau" was observed with increasing stirring rate. The activation energies of Cr（Ⅵ） extraction by N235 dissolved in diluents were calculated. Kinetics analysis proved that the mass transfer was controlled mainly by diffusion and the chemical reaction between Cr（Ⅵ） anions and N235 could be achieved at the liquid-liquid interface. On the basis of the relation between ln[Cr（Ⅵ）] and ln R0 or ln[N235] and ln R0, the rate equations can be obtained. This research provides a proof-in-concept analysis for kinetic mechanism.

论文目录

文章来源

类型: 期刊论文

作者: 李莹雪,祁秀秀,刘建康,吴淑君,崔崇威

来源: Journal of Donghua University(English Edition) 2019年03期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 化学

单位: Institute of Pharmaceutical and Environmental Engineering, Changzhou Vocational Institute of Engineering,School of Environment,Harbin Institute of Technology

基金: Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.18KJD610001),Doctor of Philosophy(PhD)Start-up Foundation of Changzhou Vocational Institute of Engineering(No.11130900117002),Jiangsu Students’Platform for Innovation and Entrepreneurship Training Program,China(No.201813102026H),Qing-Lan Project of Jiangsu Province,China(No.2018-12)

分类号: O658.2

DOI: 10.19884/j.1672-5220.2019.03.002

页码: 221-226

总页数: 6

文件大小: 637K

下载量: 15

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