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Solvent extraction of Zn(II) by Cyanex 923 and its application to a solid‐supported liquid membrane system
Author(s) -
Alguacil Francisco José,
Martínez Susana
Publication year - 2001
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.369
Subject(s) - zinc , hydrochloric acid , extraction (chemistry) , chemistry , exothermic reaction , membrane , metal , inorganic chemistry , phase (matter) , phosphine , solvent extraction , ligand (biochemistry) , chromatography , organic chemistry , catalysis , biochemistry , receptor
The extraction of zinc(II) by Cyanex 923 (phosphine oxides mixture) in Solvesso 100 from hydrochloric acid solution has been investigated. The extraction reaction is exothermic. The numerical analysis of metal distribution data suggests the formation of ZnCl 2 ·L 2 ,HZnCl 3 ·2L and H 2 ZnCl 4 ·2L(L = ligand) in the organic phase with formation constants K ext = 4.1,5.6 × 10 9 and 6.7 × 10 9 , respectively. The results obtained for zinc(II) distribution have been implemented in a solid‐supported liquid membrane system. The influence of source phase stirring speed, membrane composition and metal concentration on zinc transport have been investigated. © 2001 Society of Chemical Industry