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Minerals 2017, 7(4), 61; doi:10.3390/min7040061

Effect of the Structure of Alkyl Salicylaldoxime on Extraction of Copper(II)

School of Metallurgical and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 34100, China
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
School of Chemical Engineering, The University of Queensland, Brisbane 4072, Australia
Author to whom correspondence should be addressed.
Academic Editor: M. Thaddeus Ityokumbul
Received: 18 January 2017 / Revised: 28 March 2017 / Accepted: 29 March 2017 / Published: 20 April 2017
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Four kinds of alkyl salicylaldoxime (AS) were investigated to probe the effect of molecular structure on the extraction of Cu(II). With the augment of R groups, tert-octylsalicylaldoxime and nonylsalicylaldoxime have much stronger extraction ability for Cu(II) than salicylaldoxime and tert-butylsalicylaldoxime, which is consistent with the rise of hydrophobicity (Log P) of the extractants. The umbrella structure of the R group can endow tert-octylsalicylaldoxime with stronger steric-hindrance effect than nonylsalicylaldoxime, which results in the better separation efficiency of Cu(II) from Fe(III) for tert-octylsalicylaldoxime. The extraction ability of the extractants for Cu(II) is related to the hydrophobicity and molecular size, as predicted from quantum chemistry calculation. View Full-Text
Keywords: alkyl salicylaldoxime; Copper(II) ion; molecular structure; extraction efficiency; separation alkyl salicylaldoxime; Copper(II) ion; molecular structure; extraction efficiency; separation

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Li, L.; Wang, Y.; An, W.; Bao, S. Effect of the Structure of Alkyl Salicylaldoxime on Extraction of Copper(II). Minerals 2017, 7, 61.

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