期刊
SOLVENT EXTRACTION AND ION EXCHANGE
卷 40, 期 1-2, 页码 86-105出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/07366299.2021.1899606
关键词
extractant mixtures; synergy; microstructures; the free energy of transfer; self-assembly; ienaics
资金
- European Research Council under the European Union [320915]
- Slovenian Research Agency [P3-0388]
- French ANR Agence Nationale de la Recherche [ANR-18-CE29-0010]
- Laboratory Chemisyst [ANR 11-01-05]
- [BIFR/CEA/16-18-002]
- Agence Nationale de la Recherche (ANR) [ANR-18-CE29-0010] Funding Source: Agence Nationale de la Recherche (ANR)
Efficient formulations in hydrometallurgy often rely on the synergistic action of two oil-soluble extractants at an optimized mole fraction. This study investigates the DMDOHEMA/HDEHP system and how synergistic effects vary with acidity, presenting experimental results and proposing a theoretical model for interpreting the acid effect on synergism and antagonism.
Efficient formulations used in hydrometallurgy are often based on synergistic action of two oil-soluble extractants at an optimized mole fraction. In this series of two papers, we describe the N,N'-dimethyl-N,N'-dioctylhexylethoxymalonamide (DMDOHEMA)/di(2-ethylexyl) phosphoric acid (HDEHP) system, and how expression of the synergistic effect varies with acidity, using the three common representations: distribution ratios, yields, and free energies of transfer. The experimental results are detailed in this first part (Part I) with the so-called supramolecular approach, which considers the reverse micelle-like aggregates formed by the lipophilic extractant molecules. It shows that no specific aggregation state is observed at the maximum of synergism and antagonism. Besides, the critical aggregation concentration that characterizes the micellization free energy appears to follow some synergistic trends but cannot explain how acid tunes synergism to antagonism of this mixed system. Based on these results, Part II proposes a theoretical model based on the ienaic approach to interpret acid effect on synergism and antagonism.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据