SOLVENT EXTRACTION OF In(III) FROM CONCENTRATED HC1 MEDIA WITH ADOGEN 364

ABSTRACT The distribution equilibria of In (III) 0.1 mmol/dm3 from HCI concentrated media (2.2-4 mol/dm3) with the commercial trialkylamine ADOGEN 364 dissolved in kerosene was studied. Due to the association processes that these type of extractants present in the organic phase, a preliminary study was performed by means of a two phase potentiometric titration with the aim of determining the degree of association and the formation constants of the aggregates. The extraction of HCI is explained on the basis of the formation of ADGHCI and (ADGHCI)2 species. With the data obtained the solvent extraction process of In(III) is discussed. The presence of (ADGHCI)lnCl3, (ADGHCI)2lnCl3 and ((ADGHCI)2)2,nCl3 species in the organic phase allows to explain more satisfactory the experimental results obtained. For all the proposed equilibria the corresponding equilibrium constant is determined from the numerical analysis of the data with the use of the Letagrop-Zeta or Letagrop-Distr programs.

[1]  S. Kuchekar,et al.  Separation of gallium, indium and thallium by extraction with n-octylaniline in chloroform. , 1988, Talanta.

[2]  M. Aguilar,et al.  On extraction with long-chain amines-XXX The extraction of hydrochloric acid by tri-n-hexylamine dissolved in n-octane , 1980 .

[3]  G. M. Ritcey,et al.  Solvent extraction : principles and applications to process metallurgy , 1979 .

[4]  H. Wagner,et al.  On the extraction of In(III) with tri-n-octylamine from HCl solutions , 1977 .

[5]  L. Ehrenberg,et al.  High-speed Computers as a Supplement to Graphical Methods. 12. Application of LETAGROP to Data for Liquid-liquid Distribution Equilibria. , 1971 .

[6]  S. Srivastava,et al.  The Nature of the Halide Complexes of Fe(III), Co(II), Ga(III) and In(III) Extracted from Aqueous Chloride Media by High Molecular Weight Substituted Alkyl Ammonium Compounds , 1965 .

[7]  J. L. Fasching,et al.  Extraction of Fe (III) and In (III) from aqueous HCl by tri-n-octylamine in nitrobenzene☆ , 1965 .

[8]  P. Lloyd,et al.  Extraction of Hexavalent Uranium by Trilaurylamine Nitrate , 1964 .

[9]  M. Good,et al.  Extraction of In(III) and Ga(III) from aqueous chloride media by long chain alkyl amines and quaternary salts , 1964 .

[10]  D. Maydan,et al.  ANION EXCHANGE OF METAL COMPLEXES. X.1 THE INDIUM—CHLORIDE SYSTEM. COMPARISON OF RESIN AND LIQUID ANION EXCHANGE , 1963 .

[11]  Norman C. Li,et al.  Dinonyl naphthalene sulphonic acid and tri-n-octylamine as liquid ion-exchangers for the study of Fe(III) and In(III)-chloride complexes , 1961 .

[12]  G. Gran.  Determination of the equivalence point in potentiometric titrations. Part II , 1952 .