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Extraction of Ni(II) by n-dodecanoic acid dissolved in toluene |
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| Authors: | M P Elizalde J M Castresana M C Alonso |
| Institution: | Departamento de Química, Universidad del País Vasco, Apartado 644, Bilbao, Spain Department de Química, ETSIIB, Universidad Politécnica de Catalunya, Diagonal 647, Barcelona 08028, Spain |
| Abstract: | The extraction of Ni(II) from nitrate medium of ionic strength 2.0 mol · dm−3 by n-dodecanoic acid (HA) dissolved in toluene has been studied at 293 K. Distribution measurements of the metal ion in a wide range of pH and carboxylic acid concentration have been performed. Experimental data, treated by different graphical methods as well as numerically by the LETAGROP-DISTR program, have been explained assuming the presence in the organic phase of the species NiA2, NiA2(HA)2, NiA2(HA)2]2 and NiA2(HA)2]3. Equilibrium constants for the different extraction reactions are given. |
| Keywords: | Author to whom correspondence should be addressed |
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