Solvent extraction equilibrium study of manganese(II) with Cyanex 302 in kerosene

被引：21
作者：
Devi, Nihar Bala [1 ]
Mishra, Sujata [1 ]
机构：
[1] Siksha O Anusandhan Univ, Dept Chem, Inst Tech Educ & Res, Bhubaneswar 751030, Orissa, India
来源：
HYDROMETALLURGY | 2010年 / 103卷 / 1-4期
关键词：
Solvent extraction; Equilibrium pH; Manganese(II); Cyanex; 302; SINGLE DROP TECHNIQUE; SULFATE-SOLUTIONS; SODIUM-SALTS; METAL-IONS; D2EHPA; ACID; SEPARATION; KINETICS; MN(II); PURIFICATION;
D O I：
10.1016/j.hydromet.2010.03.007
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The single-stage extraction of manganese(II) sulphate with Cyanex 302 in kerosene (O:A = 1:1) has been studied. The pH(50) values are 5.75, 5.35, 5.20 and 4.15 for 0.025, 0.05, 0.07 and 0.1 M Cyanex 302. respectively. The mechanism of extraction and stoichiometries of metal-containing extracted species has been established on the basis of slope analysis and the distribution data has been used to calculate the extraction equilibrium constant. From the slope analysis data, the composition of the extracted species in the organic phase is proposed to be MnR(2)(RH)(4). The temperature variation studies show that the extraction process is exothermic which is confirmed from the negative value of Delta H. The negative value of Delta S indicates strong complexation between Mn(II) and Cyanex 302. (C) 2010 Elsevier B.V. All rights reserved.
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收藏
页码：118 / 123
页数：6
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