Efficiency and Mechanism of Palladium(II) Extraction from Chloride Media with N‑Hexadecylpiperidinium Chloride

Anna Cieszyńska , Daria Wieczorek

Abstract

N-hexadecylpiperidinium chloride ([PIP16]Cl) has been synthesized and examined as a reagent for extractive recovery of palladium(II) from hydrochloric acid solutions. The effect of the contact time between the two phases, temperature and the concentration of palladium(II) ions, the extractant and HCl, were also evaluated. The anion-exchange mechanism of palladium(II) extraction with [PIP16]Cl was confirmed by Job’s method, UV–VIS, IR and 1H NMR analysis. The extraction of palladium(II) from 0.1 mol·L−1 HCl solution with [PIP16]Cl in toluene was very effective and amounted to almost 100%. Increases in both HCl and NaCl concentrations and increasing temperature had negative effects on the effectiveness of palladium(II) extraction. [PIP16]Cl also exhibited selectivity to extraction of palladium(II) over some other metals: rhodium(III), iron(III), aluminium(III), copper(II) and lead(II). From among the examined stripping solutions the most effective were 0.5 mol·L−1 aqueous solution of ammonia and 0.1 mol·L−1 thiourea in 0.1 or 1 mol·L−1 HCl. The percentage of palladium(II) stripped from loaded organic phase reached nearly 100%. The feasibility of regeneration of [PIP16]Cl and its reuse in subsequent extractions was also investigated.
Author Anna Cieszyńska (WT / KTiAI)
Anna Cieszyńska,,
- Department of Technology and Instrumental Analysis
, Daria Wieczorek (WT / KTiAI)
Daria Wieczorek,,
- Department of Technology and Instrumental Analysis
Journal seriesJournal of Solution Chemistry, ISSN 0095-9782, e-ISSN 1572-8927, (N/A 40 pkt)
Issue year2020
No49
Pages486-503
Publication size in sheets0.85
Keywords in PolishPallad, Ekstrakcyjny odzysk, Ekstrakcja rozpuszczalnikowa, reekstrakcja, chlorek N-heksadecylopiperydyniowy
Keywords in EnglishPalladium, Extractive recovery, Solvent extraction, Stripping, N-hexadecylpiperidinum chloride
ASJC Classification1303 Biochemistry; 1304 Biophysics; 1312 Molecular Biology; 1606 Physical and Theoretical Chemistry
DOIDOI:10.1007/s10953-020-00981-5
URL https://link.springer.com/article/10.1007/s10953-020-00981-5
Languageen angielski
Score (nominal)40
Score sourcejournalList
ScoreMinisterial score = 40.0, 30-06-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.542; WoS Impact Factor: 2018 = 1.039 (2) - 2018=1.215 (5)
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