Extraction of zinc(II) from hydrochloric acid solutions with 1-{[2-(2,4-dichlorophenyl)-4-propyl-1,3-dioxolan-2-yl]-methyl}-1H-1,2,4-triazole

摘要

Extraction of zinc(II) from hydrochloric acid solutions with 1-{[2-(2,4-dichlorophenyl)-4-propyl-1,3-dioxolan-2-yl]-methyl}-1H-1,2,4-triazole (toluene with 15 vol % of n-decanol as a diluent) was studied. It was found that zinc(II) is extracted most efficiently at aqueous phase acidity of 5 mol/L HCl by anion-exchange mechanism with formation of ionic associates (L center dot H)(2)ZnCl4. Concentration constant was calculated and thermodynamic parameters of zinc(II) extraction from 5 mol/L HCl solutions were assessed. The extraction was shown to be exothermic process in the range 20-50A degrees C.