Solvent extraction of mineral acids. IV. Solute-solvent interaction in the system perchloric acid-water-tri-N-butyl phosphate

2007 ◽  
Vol 10 (7) ◽  
pp. 287-292 ◽  
Author(s):  
A. S. Kertes ◽  
V. Kertes
Keyword(s):  
Solvent Extraction ◽  
Perchloric Acid ◽  
Acid Water ◽  
Solvent Interaction ◽  
Mineral Acids ◽  
Solute Solvent Interaction

Extraction of hafnium(IV) with organophosphorus reagents from solutions of mineral acids mixtures

1979 ◽  
Vol 44 (12) ◽  
pp. 3656-3664
Author(s):  
Oldřich Navrátil ◽  
Jiří Smola ◽  
Rostislav Kolouch
Keyword(s):  
Ionic Strength ◽  
Aqueous Phase ◽  
Organic Phase ◽  
Perchloric Acid ◽  
Synergic Effect ◽  
Salting Out ◽  
Initial Concentration ◽  
Mixed Complexes ◽  
Synergic Extraction ◽  
Mineral Acids

Extraction of hafnium(IV) was studied from solutions of mixtures of perchloric and nitric acids and of perchloric and hydrochloric acids for constant ionic strength, I = 2, 4, 6, or 8, and for cHf 4 . 10-4 mol l-1. The organic phase was constituted by solutions of some acidic or neutral organophosphorus reagents or of 2-thenoyltrifluoroacetone, 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone, or N-benzoyl-N-phenylhydroxylamine in benzene, chloroform, or n-octane. A pronounced synergic extraction of hafnium proceeds only on applying organophosphorus reagents from an aqueous phase whose acidity is not lower than 3M-(HClO4 + HNO3) or 5M-(HClO4 + HCl). The synergic effect was not affected markedly by a variation of the initial concentration of hafnium in the range 1 . 10-8 -4 .10-4 mol l-1, it lowered with increasing initial concentration of the organophosphorus reagent and decreasing concentration of the H+ ions. It is suggested that the hafnium passes into the organic phase in the form of mixed complexes, the salting-out effect of perchloric acid playing an appreciable part.

Thermodynamic properties of the charge-asymmetric electrolyte mixture indium perchlorate-perchloric acid-water

1985 ◽  
Vol 89 (12) ◽  
pp. 2661-2665 ◽  
Author(s):  
J. Vanhees ◽  
J. P. Francois ◽  
J. Mullens ◽  
J. Yperman ◽  
L. C. Van Poucke
Keyword(s):  
Thermodynamic Properties ◽  
Perchloric Acid ◽  
Acid Water ◽  
Electrolyte Mixture
Sign in / Sign up

Export Citation Format

Share Document