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Solvent extraction equilibrium of zinc from nitrate solutions with 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester / Chaitanya R. Adhikari in Industrial & engineering chemistry research, Vol. 51 N° 50 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 50 (Décembre 2012) . - pp. 16433-16437 Titre : Solvent extraction equilibrium of zinc from nitrate solutions with 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester Type de document : texte imprimé Auteurs : Chaitanya R. Adhikari, Auteur ; Hirokazu Narita, Auteur Année de publication : 2013 Article en page(s) : pp. 16433-16437 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Solvent  extraction Résumé : The solvent extraction equilibrium of zinc with 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (EHPNA) in an alkane diluent, Shellsol D70, was studied at a constant ionic strength of 1 mol/L from nitrate solutions considering the correction of the extractant nonideality in the organic phase by Alstad's method. On the basis of the slope analysis of the obtained data, a molar ratio of 1:2 for the zinc to the EHPNA dimer in the extracted complex was indicated. Apparent extraction equilibrium constants obtained at each temperature from 283 to 323 K showed the endothermic nature of the extraction reaction and gave the apparent standard enthalpy and entropy changes. These two constants enable the calculation of the zinc distribution ratio at each temperature which correlates the experimental data with good accuracy. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26732171 [article] Solvent extraction equilibrium of zinc from nitrate solutions with 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester [texte imprimé] / Chaitanya R. Adhikari, Auteur ; Hirokazu Narita, Auteur . - 2013 . - pp. 16433-16437. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 50 (Décembre 2012) . - pp. 16433-16437 Mots-clés : Solvent  extraction Résumé : The solvent extraction equilibrium of zinc with 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (EHPNA) in an alkane diluent, Shellsol D70, was studied at a constant ionic strength of 1 mol/L from nitrate solutions considering the correction of the extractant nonideality in the organic phase by Alstad's method. On the basis of the slope analysis of the obtained data, a molar ratio of 1:2 for the zinc to the EHPNA dimer in the extracted complex was indicated. Apparent extraction equilibrium constants obtained at each temperature from 283 to 323 K showed the endothermic nature of the extraction reaction and gave the apparent standard enthalpy and entropy changes. These two constants enable the calculation of the zinc distribution ratio at each temperature which correlates the experimental data with good accuracy. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26732171