Indium recovery from acidic aqueous solutions by solvent extraction with D2EHPA: A statistical approach to the experimental design

被引:19
作者
Fortes, MCB
Martins, AH
Benedetto, JS
机构
[1] CDTN CNEN, BR-30161970 Belo Horizonte, MG, Brazil
[2] Univ Fed Minas Gerais, Dept Met & Mat Engn, BR-30160030 Belo Horizonte, MG, Brazil
关键词
solvent extraction; indium; D2EHPA; statistical approach;
D O I
10.1590/S0104-66322003000200005
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
This experimental work presents the optimization results of obtaining a high indium concentration solution and minimum iron poisoning by solvent extraction with D2EHPA solubilized in isoparaffin and exxsol. The variables studied in the extraction step were D2EHPA concentration, acidity of the aqueous phase and time of contact between phases. Different hydrochloric and sulfuric acid concentrations were studied for the stripping step. The optimum experimental conditions resulted in a solution with 99% indium extraction and less than 4% iron. The construction of a McCabe-Thiele diagram indicated two theoretical countercurrent stages for indium extraction and at least six stages for indium stripping. Finally, the influence of associated metals found in typical sulfate leach liquors from zinc plants was studied. Under the experimental conditions for maximum indium extraction, 96% indium extraction was obtained, iron extraction was about 4% and no Ga, Cu and Zn were co-extracted.
引用
收藏
页码:121 / 128
页数:8
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