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硝酸乙铵可增强磷酸三丁酯（TBP）对过渡金属硝酸盐的萃取能力。

Ethylammonium nitrate enhances the extraction of transition metal nitrates by tri--butyl phosphate (TBP).

作者信息

Li Zheng, Zhang Zidan, Onghena Bieke, Li Xiaohua, Binnemans Koen

机构信息

Department of Chemistry KU Leuven Heverlee Belgium.

Department of Chemical Engineering University of Texas at Austin Austin Texas USA.

出版信息

AIChE J. 2021 Jul;67(7):e17213. doi: 10.1002/aic.17213. Epub 2021 Feb 4.

DOI:10.1002/aic.17213
PMID:34219743
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8244074/
Abstract

Several molecular polar solvents have been used as solvents of the more polar phase in the solvent extraction (SX) of metals. However, the use of hydrophilic ionic liquids (ILs) as solvents has seldomly been explored for this application. Here, the hydrophilic IL ethylammonium nitrate (EAN), has been utilized as a polar solvent in SX of transition metal nitrates by tri--butyl phosphate (TBP). It was found that the extraction from EAN is considerably stronger than that from a range of molecular polar solvents. The main species of Co(II) and Fe(III) in EAN are likely [Co(NO)] and [Fe(NO)], respectively. The extracted species are likely Fe(TBP)(NO) and a mixture of Co(TBP)(NO) and Co(TBP)(NO). The addition of HO or LiCl to EAN reduces the extraction because the metal cations coordinate to water molecules and chloride ions stronger than to nitrate ions. This study highlights the potential of using hydrophilic ILs to enhance SX of metals.

摘要

在金属溶剂萃取（SX）中，几种分子极性溶剂已被用作极性更强相的溶剂。然而，对于该应用，很少探索使用亲水性离子液体（ILs）作为溶剂。在此，亲水性离子液体硝酸乙铵（EAN）已被用作磷酸三丁酯（TBP）萃取过渡金属硝酸盐的极性溶剂。发现从EAN中的萃取比从一系列分子极性溶剂中的萃取要强得多。EAN中Co（II）和Fe（III）的主要物种可能分别是[Co(NO)]和[Fe(NO)]。萃取的物种可能是Fe(TBP)(NO)以及Co(TBP)(NO)和Co(TBP)(NO)的混合物。向EAN中添加H₂O或LiCl会降低萃取率，因为金属阳离子与水分子和氯离子的配位作用强于与硝酸根离子的配位作用。这项研究突出了使用亲水性离子液体增强金属溶剂萃取的潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4f1d/8244074/c362c3f91c02/AIC-67-e17213-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4f1d/8244074/39af53a17886/AIC-67-e17213-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4f1d/8244074/0e5cfac095b2/AIC-67-e17213-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4f1d/8244074/c362c3f91c02/AIC-67-e17213-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4f1d/8244074/3221a282395f/AIC-67-e17213-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4f1d/8244074/73f7e9152ed3/AIC-67-e17213-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4f1d/8244074/08318f5cc9a8/AIC-67-e17213-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4f1d/8244074/baed9b4c7042/AIC-67-e17213-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4f1d/8244074/39af53a17886/AIC-67-e17213-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4f1d/8244074/0e5cfac095b2/AIC-67-e17213-g007.jpg
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