Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Separation of Zirconium and Hafnium from Zirconium Oxychloride (ZOC) Synthesis of Kalimantan Zircon Sand Concentrate Using Extraction Method with tributyl phosphate (TBP)-Dodecane in Nitric Acid Medium

  • Kharistya Rozana (Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Gadjah Mada) ;
  • Ariyani Kusuma Dewi (Department of Nuclear Chemical Engineering, Polytechnic of Institute Nuclear Technology, National Research and Innovation Agency) ;
  • Herry Poernomo (Research Center of Mining Technology, Research Organization of Nanotechnology and Materials, National Research and Innovation Agency) ;
  • Won-Chun Oh (Department of Advanced Materials and Engineering, Hanseo University) ;
  • Karna Wijaya (Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Gadjah Mada)
  • Received : 2024.02.16
  • Accepted : 2024.05.15
  • Published : 2024.05.27
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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.

Keywords

Acknowledgement

This research is fully supported by BRIN Degree by Research Program, Polytechnic of Institute Nuclear Technology, and Center for Mining Technology Research BRIN.

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