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Effect of 4(2)-Octylaminopyridine Distribution in a Water (HCl)/Chloroform System on the Extraction of Metal Ions from Chloride Solutions

Russian Journal of Physical Chemistry A, ISSN: 1531-863X, Vol: 93, Issue: 5, Page: 828-834
2019
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Abstract: Distributions of 4(2)-octylaminopyridines (4(2)-OAPs) as extractants in an HO(HCl)/CHCl system were studied by UV and IR spectroscopy and potentiometry. The ionization constant of monoprotonated 4-OAP, the logarithmic distribution constant of 4-OAP and its chloride, and the logarithmic extraction constant of hydrochloric acid were calculated. These values were compared with those for 2-OAP. The isotherm (20 ± 2°C) of HCl extraction with 0.1 M 4-OAP in chloroform is given. The difference in the extraction chemistry of hydrochloric acid with 2- and 4-OAPs and specific application features of these reagents for extraction of metals from chloride solutions are discussed.

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