Extraction of AuCl4- from HCl solutions by the chloride salt of the secondary amine Amberlite LA2 and estimation of the interaction coefficient between AuCl4- and H+

Authors
Alguacil, FJ Martinez, S Sastre, AM
Citation
Fj. Alguacil et al., Extraction of AuCl4- from HCl solutions by the chloride salt of the secondary amine Amberlite LA2 and estimation of the interaction coefficient between AuCl4- and H+, J CHEM R-S, (9), 2001, pp. 384-386
Citations number
25
Categorie Soggetti
Chemistry
Journal title
JOURNAL OF CHEMICAL RESEARCH-S
ISSN journal
03082342 → ACNP
Issue
9
Year of publication
2001
Pages
384 - 386
Database
ISI
SICI code
0308-2342(200109):9<384:EOAFHS>2.0.ZU;2-S
Abstract
The equilibrium distribution of AuCl4- between hydrochloric acid and the ch loride salt of the secondary amine Amberlite LA2 in xylene was investigated . The extraction reaction is exothermic (DeltaH degrees = -20.8 kJ/mol). Th e stoichiometry of the complex formed in the organic phase can be represent ed by R 'R " NHH+AuCl4- and the extraction equilibrium constant depends on the ionic strength. From this dependency it was found that log K degrees = 3.9 and the interaction coefficient between AuCl4- and H+ is 0.24.