The Extraction Transfer of H+-18-Crown-6 Species across the Water-Nitrobenzene Phase Boundary in the Extraction of Aqueous Solutions of Perchloric Acid by Nitrobenzene in the Presence of 18-Crown-6

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Title:The Extraction Transfer of H+-18-Crown-6 Species across the Water-Nitrobenzene Phase Boundary in the Extraction of Aqueous Solutions of Perchloric Acid by Nitrobenzene in the Presence of 18-Crown-6
Creators:
Vaňura, Petr
Juklíková, Iveta
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 58, 3, pp. 483-495

Abstract

A study was made of the extraction of perchloric acid in water-nitrobenzene-18-crown-6 (hereafter L) systems. The experimental data was interpreted on the basis of the assumption that the extraction occurs according the equations H<sup>+</sup><sub>aq</sub> + ClO<sub>4,aq</sub><sup>-</sup> ↔ H<sup>+</sup><sub>org</sub> + ClO<sub>4,org</sub><sup>-</sup> and H<sup>+</sup><sub>aq</sub> + L<sub>aq</sub> + ClO<sub>4,aq</sub><sup>-</sup> ↔ HL<sup>+</sup><sub>org</sub> + ClO<sub>4,org</sub><sup>-</sup>. Crown is also protonated in the aqueous phase according to the equation H<sup>+</sup><sub>aq</sub> + L<sub>aq</sub> ↔ HL<sup>+</sup><sub>aq</sub>. The values of the corresponding extraction constants, the protonation constants of 18-crown-6 in nitrobenzene and water and the individual extraction constants of the HL<sup>+</sup> species in the water-nitrobenzene system were determined, along with the magnitude of the molar free enthalpy for the transfer of these species across the given phase boundary.

Title:The Extraction Transfer of H+-18-Crown-6 Species across the Water-Nitrobenzene Phase Boundary in the Extraction of Aqueous Solutions of Perchloric Acid by Nitrobenzene in the Presence of 18-Crown-6
Creators:
Vaňura, Petr
Juklíková, Iveta
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:58
Number:3
Page Range:pp. 483-495
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19930483UNSPECIFIED
ID Code:172
Item Type:Article
Deposited On:06 Feb 2009 16:58
Last Modified:06 Feb 2009 15:58

Citation

Vaňura, Petr; Juklíková, Iveta (1993) The Extraction Transfer of H+-18-Crown-6 Species across the Water-Nitrobenzene Phase Boundary in the Extraction of Aqueous Solutions of Perchloric Acid by Nitrobenzene in the Presence of 18-Crown-6. Collection of Czechoslovak Chemical Communications, 58 (3). pp. 483-495. ISSN 0010-0765

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