Synergistic Extraction of Gallium(III) with 2-Ethylhexyl-Phosphonic Acid Mono-2-Ethylhexyl Ester in the Presence of Oxine Derivatives

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Michiaki Matsumoto¹  Kazuhiro Yano¹  Kazuo Kondo¹ 

[1] Department of Chemical Engineering and Materials Science, Doshisha University

关键词: Solvent Extraction;    Synergistic Extraction;    Gallium;    Equilibrium;    Oxine Derivatives;   

DOI  :  10.1252/jcej.29.836

来源: Maruzen Company Ltd

【 摘 要 】

References(11)Cited-By(11)The synergistic extraction of gallium (III) with mixed extractants of 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (EHPNA) as the main extractant and four kinds of oxine derivatives as synergists diluted in toluene or n-heptane was examined. The synergists used were 8-hydroxyquinoline, 8-hydroxyquinaldine, 5-fluoro-8-hydroxyquinoline and 5-chloro-8-hydroxyquinoline. The extraction system using EHPNA and 8-hydroxyquinaidine did not show any synergistic effect. The order of magnitude of synergism was as follows; 5-chloro-8-hydroxyquinoline > 5-fluoro-8-hydyoxyquinoline > 8-hydroxyquinoline. The extraction reaction with mixed extractants can he reasonably interpreted based an the formation of three gallium complexes. The chemical effect of the substituent group of the oxine derivatives as synergists was small. The synergistic extraction mechanism of gallium (III) by the mixed extractants of EHPNA and the oxine derivatives can he related to concentration of the synergist in the organic solution, which is determined by its distribution ratio and acid dissociation constant.

【 授权许可】

Unknown