| Abstrak/Abstract |
The separation of zirconium and hafnium using tributyl phosphate (TBP)-Dodecane extractants in nitric acid
medium was performed. Zirconium oxychloride, used as extraction feed, was obtained from the synthesis of Kalimantan zircon
sand concentrate smelted using NaOH. The extraction process was carried out by dissolving chloride-based metals in nitric acid
media in the presence of sodium nitrate using TBP-Dodecane as an extractant. Some of the extraction parameters carried out in
this study include variations in organic phase and aqueous phase (O/A), variations in contact time, and variations in nitric acid
concentration. Extraction was carried out using a mechanical shaker according to the parameter conditions. X-ray fluorescence
(XRF) was used for elemental (Zr and Hf) composition analysis of the aqueous solution. The results showed that zirconium was
separated from hafnium at optimum conditions with an organic/aqueous ratio of 1:5, contact time of 75 min, and an HNO3
concentration of 7 M. The resulting separation factor of zirconium and hafnium using TBP-Dodecane was 14.4887. |
