Kinetics analysis of the forward extraction of cerium(III) by D2EHPA from chloride medium in the presence of two complexing agents using a constant interfacial area cell with laminar flow

被引：3
作者：
Pei, Jiannan [1 ,2 ,3 ,4 ]
Zhou, Junwen [1 ,2 ,3 ,4 ]
Jiang, Feng [1 ,2 ,3 ,4 ]
Chen, Kaihua [1 ,2 ,3 ,4 ]
Yin, Shaohua [1 ,2 ,3 ,4 ]
Zhang, Libo [1 ,2 ,3 ,4 ]
Peng, Jinhui [1 ,2 ,3 ,4 ]
Lin, Yaping [5 ]
机构：
[1] Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, 68 Wenchang Rd, Kunming 650093, Yunnan, Peoples R China
[2] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China
[3] Minist Educ, Key Lab Unconvent Met, Kunming 650093, Yunnan, Peoples R China
[4] Natl Local Joint Lab Engn Applicat Microwave Ener, Kunming 650093, Yunnan, Peoples R China
[5] Kunming Univ Sci & Technol, Fac Adult Educ, Kunming 650093, Yunnan, Peoples R China
来源：
GREEN PROCESSING AND SYNTHESIS | 2018年 / 7卷 / 04期
基金：
中国国家自然科学基金;
关键词：
cerium(III); complex agents; constant interfacial area cell; D2EHPA extractant; extraction kinetics; MASS-TRANSFER KINETICS; SYNERGISTIC EXTRACTION; RARE-EARTHS; ACID; SEPARATION; SYSTEM; NEODYMIUM(III); MECHANISM; RECOVERY; CYANIDE;
D O I：
10.1515/gps-2017-0035
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The kinetic studies performed on the forward extract of cerium(III) from chloride solution with the complex agents, citric acid (H(3)Cit) and lactic acid (HLac) in the presence of di-(2-ethylhexyl)phosphoric acid (D2EHPA, H(2)A(2)) have been investigated using a constant interfacial area cell with laminar flow. The effects of stirring speed, temperature, and specific interfacial area on the extraction rate are discussed separately, and the results show that the extraction process is a diffusion-controlled kinetics process with an interfacial reaction. Studies on the effect of pH value and H(2)A(2) concentration on the extraction rate are used to obtain the rate equation. The rate-controlling step is also suggested by the predictions derived from the interfacial reaction models, and the rate equation obtained by the kinetic model is consistent with that obtained by the experimental results. The information on the extraction kinetics in this extraction system will provide some knowledge of its application.
引用
收藏
页码：380 / 386
页数：7
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