Ainscow, T. Andrew, Aldalur, Isidoro, Beezer, Anthony E., Connor, Joseph A., Garbett, Nichola C., Mitchell, John C., Page, Adelle L., Tindale, Neil, Turner, Kristian A., Willson, Richard J. and others. (1999) Influence of alkyl chain length and structure on the extraction of copper(II) from aqueous acid by 5-alkyl-2-hydroxybenzaldoximes in hydrocarbon solvents: Diffusion coefficients of extractants and their complexes. Journal of Colloid and Interface Science, 213 (1). pp. 87-91. ISSN 0021-9797. (doi:10.1006/jcis.1999.6113) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:17010)
| The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. | |
| Official URL: http://dx.doi.org/10.1006/jcis.1999.6113 |
Abstract
Measurement of the kinetics of extraction of copper(II) by 19 different 5-alkyl-2-hydroxybenzaldoximes (alkyl is C7H15 and C9H19) from acidic (hydrogen sulfate buffer) aqueous solution in the range pH 3.4-2.0, into 20% v/v toluene in n-hexane is reported. The lowering of the interfacial tension has been measured in some cases. The solubility of the extractants in water has been measured spectrophotometrically. A modified Taylor-Aris dispersion technique has been used to measure the diffusion coefficients in n-hexane and Orfom SX7 of some of the extractants and of the copper(II) complexes which they form. At low initial bulk concentrations (<10 mol m(-3)) of the extractants, the rate of extraction is controlled by the rate of diffusion of the extractant from the bulk to the organic-aqueous interface. The diffusion coefficient is related to the steric bulk of the alkyl substituent. At higher initial bulk concentrations (200 mol m(-3)) of the extractants, when the interface is saturated, the rate of extraction is inversely related to the apparent steric bulk of the alkyl substituent. (C) 1999 Academic Press.
| Item Type: | Article |
|---|---|
| DOI/Identification number: | 10.1006/jcis.1999.6113 |
| Uncontrolled keywords: | extraction; copper; diffusion coefficients; structure; kinetics |
| Subjects: |
Q Science > QD Chemistry Q Science > QC Physics |
| Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
| Depositing User: | M. Nasiriavanaki |
| Date Deposited: | 25 Jul 2009 15:58 UTC |
| Last Modified: | 05 Nov 2024 09:52 UTC |
| Resource URI: | https://kar.kent.ac.uk/id/eprint/17010 (The current URI for this page, for reference purposes) |
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