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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)

1,3
,
1
,
1
and
2,3,*
1
School of Metallurgical and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 34100, China
2
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
3
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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Abstract

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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