Extraction capacity of diglycolamide derivatives for Ca(II), Nd(III) and Zr(IV) from nitric acid to N-dodecane containing a solvent modifier.
In order to evaluate the extraction property of new extractants, diglycolamide (DGA) compounds, we investigated the maximum extraction of di-, tri-, and tetravalent metal ions using nitric acid and n-dodecane. The limits of metal concentration (LOC) for Ca(II), Nd(III) and Zr(IV) in the organic phase are strongly influenced by HNO3 and the extractant concentration. For the purpose of enhancing the LOC value, we employed a modifier of the solvent, N,N-dihexyl-octanamide (DHOA) and DGA with a long alkyl chain, and examined the results. It was evident that LOC increased with the DHOA concentration and the length of the alkyl chain attached to the N atom of DGA. The stoichiometric values of LOC(Zr) estimated from the extraction reaction were confirmed by using the extraction condition: tetraoctyl-DGA/1 M DHOA + n-dodecane and 3 M HNO3.
Sasaki
Yuji
Y
Department of Materials Science, Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319-1195, Japan. sasaki@analchem.tokai.jaeri.go.jp
Zhu
Zhi-Xuan
ZX
Sugo
Yumi
Y
Suzuki
Hideya
H
Kimura
Takaumi
T
D000473:Alkanes / Q000737:chemistry*; D002118:Calcium / Q000737:chemistry* / Q000378:metabolism; D005591:Chemical Fractionation / Q000379:methods; D006016:Glycolates / Q000032:analysis / Q000737:chemistry* / Q000378:metabolism; D009354:Neodymium / Q000737:chemistry* / Q000378:metabolism; D017942:Nitric Acid / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D015040:Zirconium / Q000737:chemistry* / Q000378:metabolism
D000473:Alkanes; D006016:Glycolates; D012997:Solvents; C007548:n-dodecane; D009354:Neodymium; D017942:Nitric Acid; C053956:glycolamide; D015040:Zirconium; D002118:Calcium