Extraction of Palladium(II) Ions from Chloride Solutions with Phosphonium Ionic Liquid Cyphos®IL101

Cieszyńska, Anna; Regel-Rosocka, Magdalena; Wiśniewski, Maciej

doi:10.2478/v10026-007-0037-4

Abstract

The extraction of palladium(II) from hydrochloric acid solutions of various concentrations in the presence of different amounts of sodium chloride with phosphonium ionic liquid Cyphos®IL101 in toluene was investigated. The extraction of Pd(II) is very effective. The percentage extraction of Pd(II) from 0.1 mol dm- 3 HCl solution amounts to 97% with Cyphos®IL101. Both the increase in HCl concentration and the presence of NaCl have a negative influence on the extraction. The extent of extraction from 0.1 mol dm-3 HCl solution in the presence of 0.5 mol dm^-3 NaCl is about 80% and from 3 mol dm^-3 HCl is lower and amounts to 56%. The extraction of Pd(II) from aqueous 0.1 mol dm^-3 HCl and from 0.1 mol dm^-3 HCl in the presence of 0.5 mol dm^-3 NaCl with this phosphonium ionic liquid is rapid and the equilibrium is achieved after 1 - 2 minutes. The extraction of Pd(II) from aqueous 3 mol dm^-3 HCl is slower and the equilibrium is achieved after 5 - 6 minutes.

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Extraction of Palladium(II) Ions from Chloride Solutions with Phosphonium Ionic Liquid Cyphos®IL101

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