NITROGEN REAGENTS IN METAL-ION SEPARATION - PART VIII - SUBSTITUTED IMIDAZOLES AS EXTRACTANTS FOR CU2+

Authors
DUPREEZ JGH MATTHEUS C SUMTER N RAVINDRAN S POTGIETER C VANBRECHT BJ
Citation
Jgh. Dupreez et al., NITROGEN REAGENTS IN METAL-ION SEPARATION - PART VIII - SUBSTITUTED IMIDAZOLES AS EXTRACTANTS FOR CU2+, Solvent extraction and ion exchange, 16(2), 1998, pp. 565-586
Citations number
9
Categorie Soggetti
Chemistry
Journal title
Solvent extraction and ion exchange → ACNP
ISSN journal
07366299
Volume
16
Issue
2
Year of publication
1998
Pages
565 - 586
Database
ISI
SICI code
0736-6299(1998)16:2<565:NRIMS->2.0.ZU;2-O
Abstract
A number of derivatives of imidazole have been synthesized. Their extr action behaviour towards Cu2+ in dilute acid medium have been investig ated in both chloride and perchlorate media. The influence of electron ic and stereochemical effects are discussed. Two-phase potentiometric titrations were employed to determine the two-phase protonation consta nts and Cu(II) complex species present in the organic phases. The N-de cylimidazole derivative has a higher extraction efficiency than the ot her C-ring substituted imidazoles in spite of their greater protonatio n constants.