CADMIUM(II) EXTRACTION FROM PHOSPHORIC MEDIA BY BIS(2,4,4-TRIMETHYLPENTYL) THIOPHOSPHINIC ACID (CYANEX-302)

Authors
ALMELA A ELIZALDE MP GOMEZ JM
Citation
A. Almela et al., CADMIUM(II) EXTRACTION FROM PHOSPHORIC MEDIA BY BIS(2,4,4-TRIMETHYLPENTYL) THIOPHOSPHINIC ACID (CYANEX-302), Fluid phase equilibria, 145(2), 1998, pp. 301-310
Citations number
21
Categorie Soggetti
Engineering, Chemical","Chemistry Physical",Thermodynamics
Journal title
Fluid phase equilibria → ACNP
ISSN journal
03783812
Volume
145
Issue
2
Year of publication
1998
Pages
301 - 310
Database
ISI
SICI code
0378-3812(1998)145:2<301:CEFPMB>2.0.ZU;2-R
Abstract
Cadmium extraction from phosphoric acid at different concentrations (0 .7-8.8 M) by the commercial reagent Cyanex 302 in kerosene has been st udied. Experimental results have been treated graphically and numerica lly and the formation of the species CdR2(HR) in the organic phase has been proposed. The value of the equilibrium constant increases with t he phosphoric concentration in the aqueous media. Small Cyanex 302 con centrations in the organic phase are enough to remove Cd(II) quantitat ively from phosphoric acid solutions. (C) 1998 Published by Elsevier S cience B.V. All rights reserved.