Solvent extraction of silver by Cyanex 272, Cyanex 302 and Cyanex 301

Kathryn C. Sole, Tonya L. Ferguson, J Brent Hiskey

Research output: Book/ReportBook

53 Citations (Scopus)

Abstract

The solvent extraction of silver from nitrate media by the extractants Cyanex 272 (bis(2,4,4-trimethylpentyl)phosphinic acid), Cyanex 302 (bis(2,4,4-trimethylpentyl)thiophosphinic acid) and Cyanex 301 (bis(2,4,4-trimethylpentyl)dithiophosphinic acid) acid characterized. Extraction shifts to lower pH with increasing sulfur substitution in the phosphinic acid, in accordance with the increased extractant acidity imparted by the soft nature of the sulfur donor atoms. The effects of extractant concentration, aqueous-phase ionic strength and organic-phase diluent on the extraction behavior are examined. The stoichiometry of the extraction reactions and the geometry of the extracted complexes are postulated based on slope analysis and spectroscopic measurements. All three extractants behave as bidentate ligands and combine in a 1:1 stoichiometric ratio with silver. The sulfur-containing ligands form multinuclear oligomeric complexes in which the ligands bridge between metal centers.

Original languageEnglish (US)
PublisherMarcel Dekker Inc
Number of pages18
StatePublished - Oct 1994

Fingerprint

Solvent extraction
Silver
Sulfur
Ligands
Acids
Phosphinic Acids
Silver Nitrate
Ionic strength
Acidity
Stoichiometry
Substitution reactions
Metals
Atoms
Geometry
Nitrates
Cyanex 302
Cyanex 272

ASJC Scopus subject areas

  • Filtration and Separation
  • Chemistry(all)

Cite this

Solvent extraction of silver by Cyanex 272, Cyanex 302 and Cyanex 301. / Sole, Kathryn C.; Ferguson, Tonya L.; Hiskey, J Brent.

Marcel Dekker Inc, 1994. 18 p.

Research output: Book/ReportBook

Sole KC, Ferguson TL, Hiskey JB. Solvent extraction of silver by Cyanex 272, Cyanex 302 and Cyanex 301. Marcel Dekker Inc, 1994. 18 p.
Sole, Kathryn C. ; Ferguson, Tonya L. ; Hiskey, J Brent. / Solvent extraction of silver by Cyanex 272, Cyanex 302 and Cyanex 301. Marcel Dekker Inc, 1994. 18 p.
@book{8fd0a97fdcbc4ed09e4b1434d78dc935,
title = "Solvent extraction of silver by Cyanex 272, Cyanex 302 and Cyanex 301",
abstract = "The solvent extraction of silver from nitrate media by the extractants Cyanex 272 (bis(2,4,4-trimethylpentyl)phosphinic acid), Cyanex 302 (bis(2,4,4-trimethylpentyl)thiophosphinic acid) and Cyanex 301 (bis(2,4,4-trimethylpentyl)dithiophosphinic acid) acid characterized. Extraction shifts to lower pH with increasing sulfur substitution in the phosphinic acid, in accordance with the increased extractant acidity imparted by the soft nature of the sulfur donor atoms. The effects of extractant concentration, aqueous-phase ionic strength and organic-phase diluent on the extraction behavior are examined. The stoichiometry of the extraction reactions and the geometry of the extracted complexes are postulated based on slope analysis and spectroscopic measurements. All three extractants behave as bidentate ligands and combine in a 1:1 stoichiometric ratio with silver. The sulfur-containing ligands form multinuclear oligomeric complexes in which the ligands bridge between metal centers.",
author = "Sole, {Kathryn C.} and Ferguson, {Tonya L.} and Hiskey, {J Brent}",
year = "1994",
month = "10",
language = "English (US)",
publisher = "Marcel Dekker Inc",

}

TY - BOOK

T1 - Solvent extraction of silver by Cyanex 272, Cyanex 302 and Cyanex 301

AU - Sole, Kathryn C.

AU - Ferguson, Tonya L.

AU - Hiskey, J Brent

PY - 1994/10

Y1 - 1994/10

N2 - The solvent extraction of silver from nitrate media by the extractants Cyanex 272 (bis(2,4,4-trimethylpentyl)phosphinic acid), Cyanex 302 (bis(2,4,4-trimethylpentyl)thiophosphinic acid) and Cyanex 301 (bis(2,4,4-trimethylpentyl)dithiophosphinic acid) acid characterized. Extraction shifts to lower pH with increasing sulfur substitution in the phosphinic acid, in accordance with the increased extractant acidity imparted by the soft nature of the sulfur donor atoms. The effects of extractant concentration, aqueous-phase ionic strength and organic-phase diluent on the extraction behavior are examined. The stoichiometry of the extraction reactions and the geometry of the extracted complexes are postulated based on slope analysis and spectroscopic measurements. All three extractants behave as bidentate ligands and combine in a 1:1 stoichiometric ratio with silver. The sulfur-containing ligands form multinuclear oligomeric complexes in which the ligands bridge between metal centers.

AB - The solvent extraction of silver from nitrate media by the extractants Cyanex 272 (bis(2,4,4-trimethylpentyl)phosphinic acid), Cyanex 302 (bis(2,4,4-trimethylpentyl)thiophosphinic acid) and Cyanex 301 (bis(2,4,4-trimethylpentyl)dithiophosphinic acid) acid characterized. Extraction shifts to lower pH with increasing sulfur substitution in the phosphinic acid, in accordance with the increased extractant acidity imparted by the soft nature of the sulfur donor atoms. The effects of extractant concentration, aqueous-phase ionic strength and organic-phase diluent on the extraction behavior are examined. The stoichiometry of the extraction reactions and the geometry of the extracted complexes are postulated based on slope analysis and spectroscopic measurements. All three extractants behave as bidentate ligands and combine in a 1:1 stoichiometric ratio with silver. The sulfur-containing ligands form multinuclear oligomeric complexes in which the ligands bridge between metal centers.

UR - http://www.scopus.com/inward/record.url?scp=0028518293&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028518293&partnerID=8YFLogxK

M3 - Book

BT - Solvent extraction of silver by Cyanex 272, Cyanex 302 and Cyanex 301

PB - Marcel Dekker Inc

ER -