Novel enhancement effect of a proton donor on chelate extraction: Extraction of iron(III) with acetylacetone and 3,5-dichlorophenol
Novel enhancement effect of a proton donor on chelate extraction: Extraction of iron(III) with acetylacetone and 3,5-dichlorophenol
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质子供体对螯合物萃取的新增强作用：用乙酰丙酮和 3,5-二氯苯酚萃取铁 (III)
DOI：
10.1007/bf02047440
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发表时间：
1992
影响因子：
1.6
通讯作者：
N. Suzuki
中科院分区：
文献类型：
--
作者：
S. Katsuta;H. Imura;N. Suzuki
研究了 3,5-二氯苯酚 (DCP) 对乙酰丙酮 (Hacac) 在非极性有机溶剂中萃取 Fe(III) 的影响。结果发现，Hacac 和 DCP 在庚烷中的混合物比单独使用 Hacac 能获得更高的 Fe(III) 萃取率。这种新颖的增强效果归因于三(乙酰丙酮)铁(III)[Fe(acac)3]与有机相中的DCP通过氢键结合。还研究了 Hacac 与 DCP 的关联，并使用游离 Hacac 和 DCP 的平衡浓度分析了 Fe(III) 的固有萃取平衡。庚烷中的缔合配合物为 Fe(acac)3 · n DCP (n=1, 2, 3)，总体缔合常数 (βass, n) 确定为 log βass, 1 = 3.41、log βass, 2, = 5.97 和 log βass, 3, = 7.50。
Effect of 3,5-dichlorophenol (DCP) on the extraction of Fe(III) with acetylacetone (Hacac) in nonpolar organic solvents has been studied. It is found that a mixture of Hacac and DCP in heptane gives much higher extraction of Fe(III) than Hacac alone. Such novel enhancement effect is ascribable to the association of tris(acetylacetonato)iron(III) [Fe(acac)3] with DCP in the organic phase by hydrogen bonding. Association of Hacac with DCP has also been investigated and the intrinsic extraction equilibrium of Fe(III) is analyzed by using the equilibrium concentration of free Hacac and DCP. The association complexes are found to be Fe(acac)3 · n DCP (n=1, 2, 3) in heptane, and the overall association constants (βass, n) are determined to be log βass, 1 = 3.41, log βass, 2, = 5.97 and log βass, 3, = 7.50.