EXTRACTION AND TRANSPORT OF NA+ AND K+ IN A LIQUID MEMBRANE CONTAINING CROWN ETHERS - EFFECT OF THE MIXED-SOLVENT

Transport rates for K+ and Na+ have been measured in a bulk liquid membrane containing dibenzo-18-crown-6 as the carrier and employing chloroform, 1,2-dichloroethane, nitrobenzene, and their binary solutions as the solvent. Also distribution ratios for liquid-liquid extraction of K+ and Na+ from aqu...

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Bibliographic Details
Published in:Journal of chemical and engineering data 1992-04, Vol.37 (2), p.281-284
Main Authors: DERNINI, S, PALMAS, S, POLCARO, AM, MARONGLU, B
Format: Article
Language:English
Subjects:
Chemistry
Chemistry, Multidisciplinary
Colloidal state and disperse state
Engineering
Engineering, Chemical
Exact sciences and technology
General and physical chemistry
Membranes
Physical Sciences
Science & Technology
Technology
Thermodynamics
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Summary:Transport rates for K+ and Na+ have been measured in a bulk liquid membrane containing dibenzo-18-crown-6 as the carrier and employing chloroform, 1,2-dichloroethane, nitrobenzene, and their binary solutions as the solvent. Also distribution ratios for liquid-liquid extraction of K+ and Na+ from aqueous solutions into organic solvents containing the crown ether are reported. In both membrane transport experiments and solvent extraction determinations, a maximum value of the transport rate v and of the distribution ratio m, respectively, is obtained when an equimolar solution of chloroform and nitrobenzene is used as the solvent.
ISSN:0021-9568
1520-5134
DOI:10.1021/je00006a039