EXTRACTION OF PLATINUM(IV) FROM HYDROCHLORIC-ACID SOLUTIONS BY AMINE ALAMINE-304 IN XYLENE - ESTIMATION OF THE INTERACTION COEFFICIENT BETWEEN PTCL62- AND H+

Authors
ALGUACIL FJ COBO A COEDO AG DORADO MT SASTRE A
Citation
Fj. Alguacil et al., EXTRACTION OF PLATINUM(IV) FROM HYDROCHLORIC-ACID SOLUTIONS BY AMINE ALAMINE-304 IN XYLENE - ESTIMATION OF THE INTERACTION COEFFICIENT BETWEEN PTCL62- AND H+, Hydrometallurgy, 44(1-2), 1997, pp. 203-212
Citations number
29
Categorie Soggetti
Metallurgy & Metallurigical Engineering
Journal title
Hydrometallurgy → ACNP
ISSN journal
0304386X
Volume
44
Issue
1-2
Year of publication
1997
Pages
203 - 212
Database
ISI
SICI code
0304-386X(1997)44:1-2<203:EOPFHS>2.0.ZU;2-A
Abstract
The extraction of Pt(IV) by Alamine 304 has been studied measuring the percentage of metal extraction as a function of different amine and m etal concentrations and aqueous ionic strengths. Results indicated the formation of the species (R(3)NH(+))(2)PtCl62- in the organic phase, the extraction reaction is exothermic (Delta H degrees = -1.9 kJ/mol), The formation constants vary linearly with the ionic strength; the in teraction coefficient between PtCl62- and H+ was estimated using the S pecific Interaction Theory, Further studies on the extraction of hydro chloric acid by the amine Alamine 304 are also presented.