Preliminary studies on ion-pair extractions of Zr, Hf, Nb, and Ta using extractants having tertiary N atom from HSO and HF

Sasaki, Yuji  ; Kaneko, Masashi   ; Matsumiya, Masahiko*

Ion-pair extractions enable to recover the anionic metal ions, such as TcO and ReO, using cationic extractant. Recently the noble metals in hydrochloric acid are extracted by extractants having secondary and tertiary amino N atoms in their structures. Following this, extractions of Zr, Hf, Nb and Ta, metal anions present in sulfonic and hydrofluoric acids, are examined using this technique. Zr and Hf in HSO, and Zr, Hf, Nb and Ta in HF can be extracted by NTAamide, MIDOA and TOA, and a basic information on their extraction behavior is obtained in this work.