[1G01-05] Vitrification 1

[1G05] Development of Recovery Process of Platinum-group Metals from HLLW for Stable Production and Volume Reduction of Homogeneous Vitrified Object

(11)Extraction of Platinum Group Metals from Nitric Acid Solutions Using Thiodiglycolamides (TDGA) and Tertiary Amines

＊Michal Cibula¹, Yusuke Inaba¹, Kenji Takeshita¹, Hirokazu Narita² (1.Tokyo Institute of Technology, 2.National Institute of Advanced Science and Technology)

Keywords:solvent extraction, platinum group metals, thiodiglycolamides, tertiary amines

Two novel TDGA extractants were synthesized and their abilities to extract Pd(II), Rh(III) and Ru(III) from nitric acid solutions were studied. In order to improve extractability of Rh(III) and Ru(III), mixed solvents of TDGA extractants and tertiary amine extractants were used. Slope analyses and Job's plots were used to assume the stoichiometry of extracted complexes.