Solvent extraction equilibrium of zinc(II) from ammonium chloride medium by CYANEX 923 in Solvesso 100

被引：4

作者：

Alguacil, FJ ^{[1
]}

Martínez, S ^{[1
]}

机构：

[1] CSIC, Ctr Nacl Invest Met, Madrid 28040, Spain

来源：

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN | 2001年 / 34卷 / 11期

关键词：

solvent extraction; chemical equilibrium; zinc; CYANEX; 923; ammonium chloride;

D O I：

10.1252/jcej.34.1439

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The extraction equilibrium of zinc in ammonium chloride medium with CYANEX 923 (phosphine oxides mixture) in Solvesso 100 has been investigated. The distribution coefficient of zinc was independent of the equilibrium pH; this independence being attributable to a solvation extraction mechanism. Slope analysis for the system using dilute zinc solution reveals that two motes of CYANEX 923 react with one mot of zinc. The stoichiometric factor of water in the extraction reaction is found to be 2, whereas experimental data indicated that two chloride ions are involved for each metal extracted. The extraction reaction is exothermic (DeltaH degrees = -42.0 kJ mol(-1)).

引用

页码：1439 / 1442

页数：4

共 17 条

[1] STUDY OF THE EXTRACTION OF ZINC(II) IN AQUEOUS CHLORIDE MEDIA BY CYANEX-302 [J].