Extraction of palladium(Ⅱ) from hydrochloride solutions with 2-n-octyl-4-isothiazolin-3-one as novel extractant

摘要

Solvent extraction of palladium(Ⅱ)from hydrochloric acid solution with 2-n-octyl-4-isothiazolin-3-one(OIT)/cyclohexane was studied.Effects of different parameters on extraction efficiency were evaluated.99.96% and 98.26% palladium(Ⅱ)could be effectively extracted with 0.018 mol·L-1OIT/cyclohexane of 0.1 and 4.0 mol·L-1HCl medium,respectively.Nonpolar solvent and low acidity could improve the extracting efficiency,and successfully strip palladium(Ⅱ)from the loaded organic phase was achieved with 0.5 mol·L-1(NH2)2CS solution.It was proposed that the extraction of Pd complexes from HCl medium proceeded through the ionassociation mechanism by slope method,NMR and FT-IR spectra.