Tantalum and Niobium Selective Extraction by Alkyl-Acetophenone

Metals

Jean Duhamet¹  Moussa Toure¹  Guilhem Arrachart²  Stephane Pellet-Rostaing² 

[1] DMRC, CEA Marcoule, 30207 Bagnols sur Cèze CEDEX, France;ICSM, CEA, CNRS, ENSCM, Université de Montpellier, 30207 Bagnols sur Cèze CEDEX, France;

关键词: 4-methylacetophenone;    refractory metals;    solvent extraction;    selective recovery;   

DOI  :  10.3390/met8090654

来源: DOAJ

【 摘 要 】

A study has been carried out on Ta and Nb recovery by a liquid-liquid extraction process using 4-methylacetophenone (4-MAcPh) as the organic phase. The 4-MAcPh was compared to methyl isobutyl ketone (MIBK) with respect to extraction efficiencies (D 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 0.14–4% 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 Ag, Fe, Ni and 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.

【 授权许可】

Unknown