Synergistic extraction study of indium from chloride medium by mixtures of sec-nonylphenoxy acetic acid and trialkyl amine

• Published in: Separation and purification technology Vol. 75; no. 1; pp. 76 - 80
• Main Authors: Fan, Shujuan, Jia, Qiong, Song, Naizhong, Su, Riyan, Liao, Wuping
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 24.09.2010; Elsevier
• Subjects: Acetic acid; Amines; Applied sciences; Chemical engineering; Chemical equilibrium; Chlorides; Exact sciences and technology; Extraction; Gallium; Indium; sec-Nonylphenoxy; Separation; Synergistic effect; Thermodynamics; Trialkyl amine; Gallium; sec-Nonylphenoxy; Trialkyl amine; Extraction; Indium; Equilibrium constant; Extract; Synergism
• ISSN: 1383-5866; 1873-3794
• DOI: 10.1016/j.seppur.2010.07.015

[Display omitted] ▶ Ga and In were extracted with mixing extractants. ▶ Mixtures based on sec-nonylphenoxy acetic acid were employed. ▶ Mixtures of sec-nonylphenoxy acetic acid and trialkyl amine had synergistic effects on In. ▶ The extracted complex, equilibrium constants, and thermodynamic functions were determined in the synergistic system. The extraction of gallium(III) and indium(III) from chloride medium with mixtures of sec-nonylphenoxy acetic acid (CA100) and other organic extractants, including trialkyl amine (N235), N, N-di(1-methyl-heptyl) acetamide (N503), tributyl phosphate (TBP), and trialkyl phosphine oxide (Cyanex923) in n-heptane, has been studied. Synergistic effects are only found when indium(III) is extracted with mixtures of CA100 and N235. The synergistic extraction stoichiometry of indium(III) with CA100 + N235 is studied with the methods of slope analysis and continuous variations. The extracted complex, equilibrium constants, and thermodynamic functions are determined. Moreover, the different extraction behavior of gallium(III) and indium(III) have been applied to discuss the separation of gallium(III) and indium(III).