Article
Version 1
Preserved in Portico This version is not peer-reviewed
Tantalum and Niobium Selective Extraction by Alkyl-Acetophenone
Version 1
: Received: 30 July 2018 / Approved: 30 July 2018 / Online: 30 July 2018 (22:03:33 CEST)
A peer-reviewed article of this Preprint also exists.
Toure, M.; Arrachart, G.; Duhamet, J.; Pellet-Rostaing, S. Tantalum and Niobium Selective Extraction by Alkyl-Acetophenone. Metals 2018, 8, 654. Toure, M.; Arrachart, G.; Duhamet, J.; Pellet-Rostaing, S. Tantalum and Niobium Selective Extraction by Alkyl-Acetophenone. Metals 2018, 8, 654.
Abstract
A study has been carried out on Ta and Nb recovery by liquid-liquid extraction process using 4-methylacetophenone (4-MAcPh) as organic phase. The 4-MAcPh was compared to methylisobutylketone (MIBK) with respect to extraction efficiencies (kD values) at different concentrations of H2SO4 in the aqueous phase. The results showed a similar extraction of Nb for both solvents. However, for Ta extraction efficiency is increased by a factor of 1.3 for 4-MAcPh. In addition, the MIBK solubilized completely after 6 mol L-1 of H2SO4 against only a loss of 0.14 to 4% for 4-MAcPh between 6 and 9 mol L-1 of H2SO4. The potential of 4-MAcPh has also been studied to selectively recover Ta from a model capacitor waste solution. The results showed a selectivity for Ta in the presence of impurities such as Fe, Ni, Mn. The 4-MAcPh also presents the advantage of having physicochemical properties adapted to its use in liquid-liquid extraction technologies such as mixer-settlers.
Keywords
4-Methylacetophenone; Refractory metals; Solvent extraction; Selective recovery
Subject
Chemistry and Materials Science, Applied Chemistry
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Comments (0)
We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.
Leave a public commentSend a private comment to the author(s)
* All users must log in before leaving a comment