Synthesis of pincer-type extractants for selective extraction of palladium from PGMs: An improved liquid-liquid extraction approach to current refining processes

Abstract SCS pincer ligands 1–4 were synthesised, and their ability to extract Pd(II) from HCl and HNO3 media was studied. The Pd(II) extraction properties of 1–4 were compared with those of commercial extractants (DOS and LIX®84-I) in kerosene. 1 and 2 showed superior Pd(II) extractability (E% = 99...

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Autores principales:	Muniyappan Rajiv Gandhi, Manabu Yamada, Kazutoshi Haga, Atsushi Shibayama
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ca2994c213444342bf2f684422115b84
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spelling	oai:doaj.org-article:ca2994c213444342bf2f684422115b842021-12-02T11:40:33ZSynthesis of pincer-type extractants for selective extraction of palladium from PGMs: An improved liquid-liquid extraction approach to current refining processes10.1038/s41598-017-09053-z2045-2322https://doaj.org/article/ca2994c213444342bf2f684422115b842017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09053-zhttps://doaj.org/toc/2045-2322Abstract SCS pincer ligands 1–4 were synthesised, and their ability to extract Pd(II) from HCl and HNO3 media was studied. The Pd(II) extraction properties of 1–4 were compared with those of commercial extractants (DOS and LIX®84-I) in kerosene. 1 and 2 showed superior Pd(II) extractability (E% = 99.9) relative to DOS and LIX®84-I from 0.1–8.0 M HCl and to DOS from 0.1–8.0 M HNO3 and mixed HCl + HNO3 media. The Pd(II) extraction rate, acid durability, the most suitable organic/aqueous (O/A) phase ratio, and Pd(II) loading capacity of extractants 1, 2, and DOS were evaluated. 1 and 2 exhibited a greater Pd(II) extraction rate and Pd(II) loading capacity than DOS. 1 was very stable in acid media (HCl and HCl + HNO3), whereas 2 and DOS deteriorated in HCl + HNO3. Selective extraction of Pd(II) by 1 and 2 was achieved from a mixed solution containing Pd, Pt, Rh, rare metals, and base metal ions that simulated the leach liquors of automotive catalysts. The back extraction of Pd(II) and reusability of extractants 1 and 2 were studied. The Pd(II) extraction mechanism of 1–4 was investigated using FT-IR, UV-visible, and NMR spectroscopy.Muniyappan Rajiv GandhiManabu YamadaKazutoshi HagaAtsushi ShibayamaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Muniyappan Rajiv Gandhi Manabu Yamada Kazutoshi Haga Atsushi Shibayama Synthesis of pincer-type extractants for selective extraction of palladium from PGMs: An improved liquid-liquid extraction approach to current refining processes
description	Abstract SCS pincer ligands 1–4 were synthesised, and their ability to extract Pd(II) from HCl and HNO3 media was studied. The Pd(II) extraction properties of 1–4 were compared with those of commercial extractants (DOS and LIX®84-I) in kerosene. 1 and 2 showed superior Pd(II) extractability (E% = 99.9) relative to DOS and LIX®84-I from 0.1–8.0 M HCl and to DOS from 0.1–8.0 M HNO3 and mixed HCl + HNO3 media. The Pd(II) extraction rate, acid durability, the most suitable organic/aqueous (O/A) phase ratio, and Pd(II) loading capacity of extractants 1, 2, and DOS were evaluated. 1 and 2 exhibited a greater Pd(II) extraction rate and Pd(II) loading capacity than DOS. 1 was very stable in acid media (HCl and HCl + HNO3), whereas 2 and DOS deteriorated in HCl + HNO3. Selective extraction of Pd(II) by 1 and 2 was achieved from a mixed solution containing Pd, Pt, Rh, rare metals, and base metal ions that simulated the leach liquors of automotive catalysts. The back extraction of Pd(II) and reusability of extractants 1 and 2 were studied. The Pd(II) extraction mechanism of 1–4 was investigated using FT-IR, UV-visible, and NMR spectroscopy.
format	article
author	Muniyappan Rajiv Gandhi Manabu Yamada Kazutoshi Haga Atsushi Shibayama
author_facet	Muniyappan Rajiv Gandhi Manabu Yamada Kazutoshi Haga Atsushi Shibayama
author_sort	Muniyappan Rajiv Gandhi
title	Synthesis of pincer-type extractants for selective extraction of palladium from PGMs: An improved liquid-liquid extraction approach to current refining processes
title_short	Synthesis of pincer-type extractants for selective extraction of palladium from PGMs: An improved liquid-liquid extraction approach to current refining processes
title_full	Synthesis of pincer-type extractants for selective extraction of palladium from PGMs: An improved liquid-liquid extraction approach to current refining processes
title_fullStr	Synthesis of pincer-type extractants for selective extraction of palladium from PGMs: An improved liquid-liquid extraction approach to current refining processes
title_full_unstemmed	Synthesis of pincer-type extractants for selective extraction of palladium from PGMs: An improved liquid-liquid extraction approach to current refining processes
title_sort	synthesis of pincer-type extractants for selective extraction of palladium from pgms: an improved liquid-liquid extraction approach to current refining processes
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/ca2994c213444342bf2f684422115b84
work_keys_str_mv	AT muniyappanrajivgandhi synthesisofpincertypeextractantsforselectiveextractionofpalladiumfrompgmsanimprovedliquidliquidextractionapproachtocurrentrefiningprocesses AT manabuyamada synthesisofpincertypeextractantsforselectiveextractionofpalladiumfrompgmsanimprovedliquidliquidextractionapproachtocurrentrefiningprocesses AT kazutoshihaga synthesisofpincertypeextractantsforselectiveextractionofpalladiumfrompgmsanimprovedliquidliquidextractionapproachtocurrentrefiningprocesses AT atsushishibayama synthesisofpincertypeextractantsforselectiveextractionofpalladiumfrompgmsanimprovedliquidliquidextractionapproachtocurrentrefiningprocesses
_version_	1718395607017586688

Synthesis of pincer-type extractants for selective extraction of palladium from PGMs: An improved liquid-liquid extraction approach to current refining processes

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