Liquid–liquid extraction of gallium(III) with n-octylaniline from succinate media

Abstract

The distribution equilibrium of gallium(III) between n-octylaniline dissolved in toluene and acidic aqueous succinate media has been investigated as a function of the concentration of extractant in the organic phase and concentration of hydrogen ions and gallium( III) ions in the aqueous phase. The stoichiometry of the extracted species was determined on the basis of slope analysis.Gallium(III) is extracted by the anion exchange mechanism as [RNH3+Ga(succinate)2]org. The temperature dependence of the extraction equilibria was examined by the temperature variation method. The extraction process is favoured with increasing temperature. It was found that a large number of cations and anions have a high tolerance limit. The selectivity of the extraction is increased by the use of suitable masking agents. The method affords the binary separation of gallium(III) from associated elements and was further extended to the analysis of a synthetic mixture.

Solvent Extraction and Separation of Gallium(III) using Hexaacetato Calix(6)Arene

“…Gallium from the organic phase was stripped with 0.1 N hydrochloric acid and was estimated by the recommended procedure. Then the pH of the aqueous phase was maintained to 6.0 and extracted with the previous organic phase having 11.2% indium. The indium was quantitatively extracted in the organic phase where it was stripped with 5 N hydrochloric acid and determined spectrophotometrically with the PAR at 520 nm.…”

An extraction study of gallium, indium, and zinc with mixtures of sec-octylphenoxyacetic acid and primary amine N1923

“…In order to investigate the influence of temperature on the extraction of Zn 2+ with CA12 + N1923, the plots of logD versus [1000/T(K)] have been determined in a range of 293-333 K. As shown in Fig. 6, a line with a slope of À0.29 has been obtained, according to which the change of enthalpy of the reaction, DH, can be calculated using Van't Hoff equation [29]:…”

4-Methyl-N-n-Octylaniline as a New Liquid Anion Exchanger for the LiquidLiquid Extraction of Gallium (III): Application to Electronic Waste LED

“…Effect of amine structure on gallium extraction from strong acid hydrochloric acid solution has been investigated. The degree of extractability of extractants was arranged in the order Adogen-464 > TABAC > TOA, Hostarex A-327, Adogen-364, Hostarex A-324 > THPA > benzyldimethylalkylammonium chloride > THA > HOEF 2562, Adogen 283 26 .The use of high molecular weight amine extractants including Adogen-464 27 , Aliquot-336S 28 , Tris(2-hydroxy-3,5-dimethylbenzylamine 29 ,n-octylaniline 30 , Nn-octylaniline 31 , 2-octylaminopyridine 32 , primary amine N1923 13 have been reported in the literature for liquid-liquid extraction of gallium. Seeing this considerable practical and historic interest in the system containing high molecular weight amines as liquid anion exchanger for extraction of Ga(III) , 4-Methyl-N-n-octylaniline is introduced as new analytical reagent for solvent extraction of Ga(III).…”