from the conferences organized by TANGER Ltd. provisional website
In this work the solvent extraction has been carried out for the removal of iron(III) from hydrochloric acid solutions. Tricaprylmethylammonium thiosalicylate [A336][TS] and trihexyl(tetradecyl)phosphonium thiosalicylate, [PR4][TS], a thiol-containing task specific ionic liquids (TSIL) were used as extractants in this process. Effect of hydrochloric acid concentration in aqueous phase on iron(III) extraction and separation has been investigated. Fe(III) ions were effectively removed from the aqueous phase by the phosphonium and ammonium ionic liquids and extraction efficiency increased with hydrochloric acid concentration increase. Also separation of Fe(III) was carried out from hydrochloric solution containing Cu(II) and the separation coefficients with [A336][TS] and [PR4][TS] were found. Highly selective extraction of Fe(III) over Cu(II) from hydrochloric acid has been achieved with 0.1 M [A336][TS] in toluene.Keywords: iron(III), solvent extraction, trihexyl(tetradecyl)phosphonium thiosalicylate, tricaprylmethylammonium thiosalicylate, ionic liquids
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