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Kinoshita, Ryoma; Sasaki, Yuji; Kaneko, Masashi; Matsumiya, Masahiko*; Shinoku, Kota*; Shiroishi, Hidenobu*
Hydrometallurgy, 222, p.106159_1 - 106159_12, 2023/10
Times Cited Count：2 Percentile：20.98(Metallurgy & Metallurgical Engineering)Solvent extraction is conducted using a total of 20 metals revealing high stability constants with Cl and hexahexyl-nitrilotriacetamide (NTAamide(C6)) extractant. The metals used here may behave as anions at high Cl concentrations, and NTAamide(C6), which contains a tertiary N atom, is protonated under acidic conditions. Most of the metal ions in this study display higher distribution ratios (D(M)) from HCl than those from HNO
, and exhibit 1:1 stoichiometries with NTAamide. Following the experimental results, the association constants and distribution coefficients of the group 12 elements are calculated via ion-pair extraction modeling using density functional theory calculations, and the simulations of D yield calculated values with the same trend as that of the measured values.
Sasaki, Yuji; Kaneko, Masashi; Ban, Yasutoshi; Kinoshita, Ryoma; Matsumiya, Masahiko*; Shinoku, Kota*; Shiroishi, Hidenobu*
Analytical Sciences, 39(9), p.1575 - 1583, 2023/09
Times Cited Count：3 Percentile：32.22(Chemistry, Analytical)Extraction of Rh from HCl can be performed by NTAamide(C6) (hexahexyl-nitrilotriacetamide) and other related compounds into n-dodecane. We use ion-pair extraction of anionic species of Rh-chloride and protonated extractant. Rh behave as anion in hydrochloric acid and the tertiary nitrogen atom in extractant may be protonated to produce the quaternary amine in acidic condition. From the present work, the maximum distribution ratio of Rh(III) is 16. The D(Rh) values are changeable during preparation of the aqueous solutions because different Rh-Cl-H
O complexes are formed in HCl media and show the slow exchange rate between Cl and HO. Using the UV spectrum, Rh-chloride solution having the peak of spectrum at 504 nm can be extracted effectively, where RhCl
(HO)
and RhCl
(H
O)
exist mainly from DFT calculation. Stoichiometry of one-one complex of Rh and NTAamide is obtained from slope analysis, and 85 mM of concentrated Rh ion can be extracted.
Journal of Radioanalytical and Nuclear Chemistry, 123(2), p.619 - 631, 1988/02
Times Cited Count：24 Percentile：87.74(Chemistry, Analytical)no abstracts in English
Journal of Radioanalytical and Nuclear Chemistry, 111(2), p.477 - 485, 1987/02
Times Cited Count：8 Percentile：62.95(Chemistry, Analytical)no abstracts in English
; C.Chang*
Nihon Genshiryoku Gakkai-Shi, 4(7), p.457 - 462, 1962/00
no abstracts in English
Bulletin of the Chemical Society of Japan, 34(1), p.63 - 68, 1961/00
Times Cited Count：73no abstracts in English
; H.M.Sammour*
Nihon Genshiryoku Gakkai-Shi, 3(5), p.344 - 352, 1961/00
no abstracts in English
; Fujino, Takeo
Nihon Genshiryoku Gakkai-Shi, 3(4), p.276 - 283, 1961/00
no abstracts in English
; H.M.Sammour*; ; ;
Nihon Genshiryoku Gakkai-Shi, 3(9), p.698 - 704, 1961/00
no abstracts in English
; C.Chang*
Nihon Genshiryoku Gakkai-Shi, 3(10), p.757 - 762, 1961/00
no abstracts in English
; ;
Nihon Genshiryoku Gakkai-Shi, 3(8), p.590 - 597, 1961/00
no abstracts in English
Bulletin of the Chemical Society of Japan, 33(8), p.1038 - 1046, 1960/00
Times Cited Count：110no abstracts in English
Sasaki, Yuji; Matsumiya, Masahiko*; Kaneko, Masashi; Kumagai, Yuta
no journal, ,
The metal-anions formed in acidic solutions can be extracted using extractants having amino N donor, which is protonated and formed to cationic extarctant there. However, there is few systematic results using this ion-pair extraction, and the extraction behavior needs more information. Therefore, we conduct experiments using different aqueous and organic phases. The disuribution ratios of Pd, Zr, Hf, Nb, Ta are over 100, and Ru, Rh, Nb, and Ta, those are considered to be hard to extract, can be extracted using this method.
