Extraction kinetics of tantalum by MIBK from pulp using Lewis cell

被引：38

作者：

Yang, Xiuli ^{[1
]}

Wang, Xiaohui ^{[2
]}

Wei, Chang ^{[1
]}

Zheng, Shili ^{[2
]}

Sun, Qing ^{[3
]}

Wang, Dong ^{[4
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China

[2] Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China

[3] China Univ Min & Technol, Sch Chem & Environm Engn, Beijing 100083, Peoples R China

[4] Beijing Co, China Petr Engn Co Ltd, Beijing 100085, Peoples R China

来源：

HYDROMETALLURGY | 2013年 / 131卷

基金：

美国国家科学基金会;

关键词：

Pulp extraction; Kinetics; Tantalum; MIBK; Lewis cell; SINGLE DROP TECHNIQUE; SOLVENT-EXTRACTION; MECHANISM; COMPLEXES; D2EHPA; PHASE; ACID;

D O I：

10.1016/j.hydromet.2012.10.008

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The kinetics of the forward extraction of TaF72- by MIBK from stock was investigated using a Lewis cell. Different parameters such as the tantalum concentration, fluoride ion concentration, hydrogen ion concentration, and MIBK concentration, as well as extracting temperature were studied separately to examine their effect on the extraction rate of TaF72-, and a rate equation was deduced based on the analysis. The experimental results demonstrate that the rate of TaF72- extraction is controlled by a chemical reaction at the interface rather than in the bulk phase. Further analysis suggests that the TaF72- extraction rate is first order with respect to MIBK concentration, hydrogen ion concentration, and tantalum concentration, and zero order with respect to fluoride ion concentration, respectively. The mechanism of TaF72- extraction is controlled by the slow distribution of the H center dot MIBK+ at the interface to form HTaF7 center dot MIBK- (i) between the pulp phase and the interface. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：34 / 39

页数：6

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