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Sasaki, Yuji; Ban, Yasutoshi; Matsumiya, Masahiko*
no journal, ,
Metal ions are present as anionic species in hydrochloric acid. Diamino-extractants containing tertiary amino N atom, such as NTAamide, protonate in acidic solutions and become cationic extractants. In this study, the ion-pair extraction of metal chloride anions, especially platinum metals and the related metals, with the cationic extractants was performed and their extraction properties are studied.
Sasaki, Yuji; Kaneko, Masashi; Ban, Yasutoshi
no journal, ,
In order to enlarge the separation factors between trivalent actinide (An) and lanthanide (Ln), which show similar chemical behavior, the water-soluble ligand is used together with extractant. Compared to the development of novel extractants, the water-soluble ligands are insufficient to develop. In this work, ten of amides and carboxylic acids are employed in TODGA extraction system and their properties are compared. It is noted that complexing ability of amide with Ln is higher than that with carboxylic acid under pH 2, if both reagents have the same central frame.
Ueda, Yuki; Micheau, C.; Motokawa, Ryuhei; Tokunaga, Kohei; Akutsu, Kazuhiro*; Yamada, Norifumi*
no journal, ,
no abstracts in English
Matsumura, Tatsuro; Takeshita, Kenji*
no journal, ,
no abstracts in English
Takeshita, Kenji*; Matsumura, Tatsuro
no journal, ,
no abstracts in English
Shimojo, Kojiro; Yabe, Makoto*; Ikeda, Mari*; Hirayama, Naoki*; Habata, Yoichi*
no journal, ,
Indium(In) and gallium(Ga) are important elements used in displays and semiconductors. However, In and Ga are extremely rare metals that are contained in trace amounts in zinc(Zn) mines. A technology for selectively separating and recovering trace amounts of In and Ga from Zn mines has been desired. We developed a new extractant, nitriloacetic acid diamide ligand (TONAADA), and investigated the extraction and separation of In and Ga from a simulated Zn mines (a mixed aqueous solution of Zn, Al, In, and Ga). As a result, the high selectivity of TONAADA was shown in the order of In 
Ga Zn = Al, and it was clarified that In and Ga can be separated and recovered from Zn and Al in a single extraction. In addition, single-crystal X-ray diffraction demonstrated that In and TONAADA form a 1:2 complex.
Mo/
TcHu, X.; Suzuki, Tatsuya*; Wang, X.*; Wang, H.*; Fujita, Yoshitaka; Tsuchiya, Kunihiko
no journal, ,
Technetium-99m (Tc) stands as the most widely employed radionuclide for nuclear medicine diagnostic imaging procedures. 
Tc originates from the radioactive decay of molybdenum-99 (Mo). In present study, four inorganic ion exchangers were synthesized by combining SnCl
with SbCl
, WO
Cl, WO
, and TiCl in a one-to-one for application to the separation of Tc and Mo by column chromatography approach. We conducted comparing and evaluating their respective Kd (distribution coefficient) values. We utilized these synthesized inorganic ion exchangers for adsorption in a solution with a prepared concentration of 4 ppm of Mo/Re, where Re acted as a surrogate element to simulate Tc. Various pH environments ranging from 2 to 12 were prepared. Subsequently, we conducted adsorption experiments using batch testing and determined the Kd values. The results revealed that all four ion exchangers exhibit commendable selectivity and relatively high Kd values, with SnCl-TiCl demonstrating the highest Kd.