Hossein Kamran Haghighi, Mehdi Irannajad
The solvent extraction of germanium and some heavy metals by commercial tri-octyl/decyl amine (Alamine 336), N-methyl-N, N-diocyl chloride (Aliquat 336) and phosphine oxide (Cyanex 923) has been studied. In each extraction system, germanium was only extracted from a solution containing nickel, cadmium, cobalt, and zinc, which had a composition similar to gasification coal fly ash aqueous leach solutions. Under comparable conditions, the germanium extraction efficiency by the aforementioned extractants was found to be in the order Aliquat 336>Alamine 336>Cyanex 923. The slope analysis method indicated that 2 moles of Alamine 336 and Aliquat 336, as well as 4 moles of Cyanex 923, participated in the extraction of germanium. Amine extraction systems required tartaric acid as a complexant to convert germanium to anionic species, where a mole ratio of 2 was essential for complete complexation. Moreover, oxalic acid at a concentration of 0.1 M was identified as an effective solvated complexant in the Cyanex 923 system. HCl solutions at 1 and 2 M concentrations effectively stripped germanium from the loaded Alamine 336 and Aliquat 336, respectively, while a 0.1 M NaOH solution sufficed for stripping from Cyanex 923. Consequently, Aliquat 336 emerged as an economical and industry-friendly extractant for germanium solvent extraction from a mixed solution.
@article{d45642f5-c45f-4c04-9049-5b9c20aabb02,
title={Recovery of germanium from leach solutio (1)},
author={Hossein Kamran Haghighi and Mehdi Irannajad},
year={2026},
language={en}
}TY - JOUR TI - Recovery of germanium from leach solutio (1) AU - Hossein Kamran Haghighi AU - Mehdi Irannajad PY - 2026 LA - en ER -
Copper solvent extraction units at large hydrometallurgical plants face constraints in metal recovery, phase disengagement, and reagent consumption, d
KAFUMBILA KASONTA JOSEPH
During the design of Cobalt solvent extraction using Cyanex 272 as extractant, the presence of Magnesium in the solvent extraction feed solution makes
KONGOLO MUSAFIRI WENCESLAS
Le présent mémoire concerne l’étude d’extraction par solvant du germanium a vec le tributylphosphate (TBP) partant du raffinat de la S ociété du trai
This paper addresses the challenge of assessing the feasibility of wind power plant projects at sites with insufficient or no local historic wind data