Liquid-liquid extraction equilibria for Pt(IV)-HCl-Cyanex 921 and Pt(IV)-HCl-Cyanex 925 systems in toluene

Authors
Mhaske, AA Dhadke, PM
Citation
Aa. Mhaske et Pm. Dhadke, Liquid-liquid extraction equilibria for Pt(IV)-HCl-Cyanex 921 and Pt(IV)-HCl-Cyanex 925 systems in toluene, J CHEM EN J, 34(8), 2001, pp. 1052-1055
Citations number
11
Categorie Soggetti
Chemical Engineering
Journal title
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
ISSN journal
00219592 → ACNP
Volume
34
Issue
8
Year of publication
2001
Pages
1052 - 1055
Database
ISI
SICI code
0021-9592(200108)34:8<1052:LEEFP9>2.0.ZU;2-S
Abstract
The equilibrium distribution of platinum(IV) between hydrochloric acid and the neutral phosphine oxide extractants Cyanex 921 as well as Cyanex 925 in toluene are examined. From the concentration dependencies of the distribut ion ratio, it was determined that Pt(IV) is extracted as (H+. 2R)(2)PtCl62- via ion-pair mechanism with both the extractants. The temperature dependen ce of the extraction equilibriums are examined by temperature variation met hod to estimate apparent thermodynamic function DeltaH.