SOLVENT EXTRACTION OF PALLADIUM(II) FROM ALKALINE CYANIDE SOLUTION BY THE DODECYL DIMETHYL-2-PHENOXYETHYL AMMONIUM BROMIDE

The direct extraction of Pd(CN)4(2-) from alkaline cyanide solutions with dodecyl dimethyl-2-phenoxyethyl ammonium bromide (DDPB) was investigated. Several factors affecting extraction efficiency, including DDPB concentration, modifier content, equilibrium time, phase ratio (O/A), pH and palladium c...

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Autores principales:	LIU,YAN, HUANG,ZHANGJIE, LI,JINFEI, CHEN,JING
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2016
Materias:	Dodecyl dimethyl-2-phenoxyethyl ammonium bromide Palladium Alkaline cyanide solution Solvent extraction
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072016000200004
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spelling	oai:scielo:S0717-970720160002000042016-09-14SOLVENT EXTRACTION OF PALLADIUM(II) FROM ALKALINE CYANIDE SOLUTION BY THE DODECYL DIMETHYL-2-PHENOXYETHYL AMMONIUM BROMIDELIU,YANHUANG,ZHANGJIELI,JINFEICHEN,JING Dodecyl dimethyl-2-phenoxyethyl ammonium bromide Palladium Alkaline cyanide solution Solvent extraction The direct extraction of Pd(CN)4(2-) from alkaline cyanide solutions with dodecyl dimethyl-2-phenoxyethyl ammonium bromide (DDPB) was investigated. Several factors affecting extraction efficiency, including DDPB concentration, modifier content, equilibrium time, phase ratio (O/A), pH and palladium concentration in aqueous phase, were studied. The results indicated that nearly all of the Pd(II) (>98%) was transferred from the aqueous phase into the organic phase. N-pentanol was the most appropriate modifier for the extraction of Pd(CN)4(2-). Palladium can be separated efficiently by DDPB over base metals (Fe ,Co, Ni and Cu) from alkaline cyanide medium. The extraction was quite fast and equilibrium could be established within 3 min. Most of Pd(II) (>96%) in the organic phase could be stripped with ammonium thiocyanate aqueous solutions, from which elemental palladium could potentially be recovered by the addition of hydrazine hydrate. The organic phase after stripping can be recycled for a continuous extraction-stripping operation. The extraction mechanism can be deduced based on FTIR spectrum and slope analysis while the mechanism of stripping can be explained by the principle of minimum charge density and Le Chatelier's principle. The proposed method was applied to extract palladium from real cyanide leaching liquor of Pd flotation concentrate with satisfactory results.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.61 n.2 20162016-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072016000200004en10.4067/S0717-97072016000200004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Dodecyl dimethyl-2-phenoxyethyl ammonium bromide Palladium Alkaline cyanide solution Solvent extraction
spellingShingle	Dodecyl dimethyl-2-phenoxyethyl ammonium bromide Palladium Alkaline cyanide solution Solvent extraction LIU,YAN HUANG,ZHANGJIE LI,JINFEI CHEN,JING SOLVENT EXTRACTION OF PALLADIUM(II) FROM ALKALINE CYANIDE SOLUTION BY THE DODECYL DIMETHYL-2-PHENOXYETHYL AMMONIUM BROMIDE
description	The direct extraction of Pd(CN)4(2-) from alkaline cyanide solutions with dodecyl dimethyl-2-phenoxyethyl ammonium bromide (DDPB) was investigated. Several factors affecting extraction efficiency, including DDPB concentration, modifier content, equilibrium time, phase ratio (O/A), pH and palladium concentration in aqueous phase, were studied. The results indicated that nearly all of the Pd(II) (>98%) was transferred from the aqueous phase into the organic phase. N-pentanol was the most appropriate modifier for the extraction of Pd(CN)4(2-). Palladium can be separated efficiently by DDPB over base metals (Fe ,Co, Ni and Cu) from alkaline cyanide medium. The extraction was quite fast and equilibrium could be established within 3 min. Most of Pd(II) (>96%) in the organic phase could be stripped with ammonium thiocyanate aqueous solutions, from which elemental palladium could potentially be recovered by the addition of hydrazine hydrate. The organic phase after stripping can be recycled for a continuous extraction-stripping operation. The extraction mechanism can be deduced based on FTIR spectrum and slope analysis while the mechanism of stripping can be explained by the principle of minimum charge density and Le Chatelier's principle. The proposed method was applied to extract palladium from real cyanide leaching liquor of Pd flotation concentrate with satisfactory results.
author	LIU,YAN HUANG,ZHANGJIE LI,JINFEI CHEN,JING
author_facet	LIU,YAN HUANG,ZHANGJIE LI,JINFEI CHEN,JING
author_sort	LIU,YAN
title	SOLVENT EXTRACTION OF PALLADIUM(II) FROM ALKALINE CYANIDE SOLUTION BY THE DODECYL DIMETHYL-2-PHENOXYETHYL AMMONIUM BROMIDE
title_short	SOLVENT EXTRACTION OF PALLADIUM(II) FROM ALKALINE CYANIDE SOLUTION BY THE DODECYL DIMETHYL-2-PHENOXYETHYL AMMONIUM BROMIDE
title_full	SOLVENT EXTRACTION OF PALLADIUM(II) FROM ALKALINE CYANIDE SOLUTION BY THE DODECYL DIMETHYL-2-PHENOXYETHYL AMMONIUM BROMIDE
title_fullStr	SOLVENT EXTRACTION OF PALLADIUM(II) FROM ALKALINE CYANIDE SOLUTION BY THE DODECYL DIMETHYL-2-PHENOXYETHYL AMMONIUM BROMIDE
title_full_unstemmed	SOLVENT EXTRACTION OF PALLADIUM(II) FROM ALKALINE CYANIDE SOLUTION BY THE DODECYL DIMETHYL-2-PHENOXYETHYL AMMONIUM BROMIDE
title_sort	solvent extraction of palladium(ii) from alkaline cyanide solution by the dodecyl dimethyl-2-phenoxyethyl ammonium bromide
publisher	Sociedad Chilena de Química
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072016000200004
work_keys_str_mv	AT liuyan solventextractionofpalladiumiifromalkalinecyanidesolutionbythedodecyldimethyl2phenoxyethylammoniumbromide AT huangzhangjie solventextractionofpalladiumiifromalkalinecyanidesolutionbythedodecyldimethyl2phenoxyethylammoniumbromide AT lijinfei solventextractionofpalladiumiifromalkalinecyanidesolutionbythedodecyldimethyl2phenoxyethylammoniumbromide AT chenjing solventextractionofpalladiumiifromalkalinecyanidesolutionbythedodecyldimethyl2phenoxyethylammoniumbromide
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SOLVENT EXTRACTION OF PALLADIUM(II) FROM ALKALINE CYANIDE SOLUTION BY THE DODECYL DIMETHYL-2-PHENOXYETHYL AMMONIUM BROMIDE

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