Separation of platinum and palladium from hydrochloric acid solutions with 1-Octyl-3-methylimidazolium hexafluorophosphate as an extractant

Takahiko Kakoi, Mina Kawagoe, Masahiro Goto

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The extraction behavior of platinum(II), platinum(IV) and palladium(II) with an ionic liquid, 1-octyl-3-methylimidazolium hexafluorophosphate ([Omim][PF6]), and a quaternary ammonium salt, distearyldimethylammonium chloride (DSDMAC), as extractants has been investigated in a liquid–liquid extraction system. In the present experimental conditions, platinum was extracted selectively over palladium by both extractants. It was found that DSDMAC possessed a higher extraction ability for the metals than that of [Omim][PF6]; on the other hand, more effective separation of platinum and palladium was achieved using [Omim][PF6] than using DSDMAC. The composition of the complex between their metals and extractants was elucidated by slope analysis and Job’s method. The metals exist as chloro anion complexes in a hydrochloric acid solution, which reacted with extractant molecules in chloroform and were extracted into the organic solutions. Furthermore, platinum could be separated from palladium in an acidic chloride medium using the ionic liquid as an extractant.

Original languageEnglish
Pages (from-to)666-670
Number of pages5
JournalJOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Volume47
Issue number8
DOIs
Publication statusPublished - Jan 1 2014

Fingerprint

Hydrochloric Acid
Palladium
Hydrochloric acid
Platinum
Chlorides
Ionic Liquids
Metals
Ionic liquids
Chloroform
Chlorine compounds
Ammonium Compounds
Anions
Negative ions
Salts
1-octyl-3-methylimidazolium hexafluorophosphate
Molecules
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Separation of platinum and palladium from hydrochloric acid solutions with 1-Octyl-3-methylimidazolium hexafluorophosphate as an extractant. / Kakoi, Takahiko; Kawagoe, Mina; Goto, Masahiro.

In: JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, Vol. 47, No. 8, 01.01.2014, p. 666-670.

Research output: Contribution to journalArticle

@article{1ac5f36a4b74410d9888148c2028b20e,
title = "Separation of platinum and palladium from hydrochloric acid solutions with 1-Octyl-3-methylimidazolium hexafluorophosphate as an extractant",
abstract = "The extraction behavior of platinum(II), platinum(IV) and palladium(II) with an ionic liquid, 1-octyl-3-methylimidazolium hexafluorophosphate ([Omim][PF6]), and a quaternary ammonium salt, distearyldimethylammonium chloride (DSDMAC), as extractants has been investigated in a liquid–liquid extraction system. In the present experimental conditions, platinum was extracted selectively over palladium by both extractants. It was found that DSDMAC possessed a higher extraction ability for the metals than that of [Omim][PF6]; on the other hand, more effective separation of platinum and palladium was achieved using [Omim][PF6] than using DSDMAC. The composition of the complex between their metals and extractants was elucidated by slope analysis and Job’s method. The metals exist as chloro anion complexes in a hydrochloric acid solution, which reacted with extractant molecules in chloroform and were extracted into the organic solutions. Furthermore, platinum could be separated from palladium in an acidic chloride medium using the ionic liquid as an extractant.",
author = "Takahiko Kakoi and Mina Kawagoe and Masahiro Goto",
year = "2014",
month = "1",
day = "1",
doi = "10.1252/jcej.14we052",
language = "English",
volume = "47",
pages = "666--670",
journal = "Journal of Chemical Engineering of Japan",
issn = "0021-9592",
publisher = "Society of Chemical Engineers, Japan",
number = "8",

}

TY - JOUR

T1 - Separation of platinum and palladium from hydrochloric acid solutions with 1-Octyl-3-methylimidazolium hexafluorophosphate as an extractant

AU - Kakoi, Takahiko

AU - Kawagoe, Mina

AU - Goto, Masahiro

PY - 2014/1/1

Y1 - 2014/1/1

N2 - The extraction behavior of platinum(II), platinum(IV) and palladium(II) with an ionic liquid, 1-octyl-3-methylimidazolium hexafluorophosphate ([Omim][PF6]), and a quaternary ammonium salt, distearyldimethylammonium chloride (DSDMAC), as extractants has been investigated in a liquid–liquid extraction system. In the present experimental conditions, platinum was extracted selectively over palladium by both extractants. It was found that DSDMAC possessed a higher extraction ability for the metals than that of [Omim][PF6]; on the other hand, more effective separation of platinum and palladium was achieved using [Omim][PF6] than using DSDMAC. The composition of the complex between their metals and extractants was elucidated by slope analysis and Job’s method. The metals exist as chloro anion complexes in a hydrochloric acid solution, which reacted with extractant molecules in chloroform and were extracted into the organic solutions. Furthermore, platinum could be separated from palladium in an acidic chloride medium using the ionic liquid as an extractant.

AB - The extraction behavior of platinum(II), platinum(IV) and palladium(II) with an ionic liquid, 1-octyl-3-methylimidazolium hexafluorophosphate ([Omim][PF6]), and a quaternary ammonium salt, distearyldimethylammonium chloride (DSDMAC), as extractants has been investigated in a liquid–liquid extraction system. In the present experimental conditions, platinum was extracted selectively over palladium by both extractants. It was found that DSDMAC possessed a higher extraction ability for the metals than that of [Omim][PF6]; on the other hand, more effective separation of platinum and palladium was achieved using [Omim][PF6] than using DSDMAC. The composition of the complex between their metals and extractants was elucidated by slope analysis and Job’s method. The metals exist as chloro anion complexes in a hydrochloric acid solution, which reacted with extractant molecules in chloroform and were extracted into the organic solutions. Furthermore, platinum could be separated from palladium in an acidic chloride medium using the ionic liquid as an extractant.

UR - http://www.scopus.com/inward/record.url?scp=84906737621&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84906737621&partnerID=8YFLogxK

U2 - 10.1252/jcej.14we052

DO - 10.1252/jcej.14we052

M3 - Article

AN - SCOPUS:84906737621

VL - 47

SP - 666

EP - 670

JO - Journal of Chemical Engineering of Japan

JF - Journal of Chemical Engineering of Japan

SN - 0021-9592

IS - 8

ER -