Trisnawati, Iga and Yulandra, Akbar and Prameswara, Gyan and Pusparini, Wahyu Rachmi and Mulyono, Panut and Prasetya, Agus and Petrus, Himawan Tri Bayu Murti (2021) Optimization of Multistage Precipitation Processes for Rare Earth Element Purification from Indonesian Zircon Tailings. Journal of Sustainable Metallurgy, 7 (2). 537 – 546. ISSN 21993823
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Abstract: This study investigated the effects of temperature, pH, and stirring speed of multistage precipitation processes. The purification process consists of uranium and thorium precipitation, oxalate precipitation, calcination, HNO3 leaching, and oxidation; finally, multistage precipitation is performed using Na2CO3 and NH4OH. The precipitation efficiencies of light rare earth elements (LREEs) and heavy rare earth elements (HREEs) reached 88 and 74, respectively, during precipitation with 15 Na2CO3 at a temperature of 50 °C, pH of 4.5, and 200 rpm. The precipitation process was continued by adding 10 NH4OH to the first precipitation raffinate. A total of 45 of the LREEs were recovered at a temperature of 30 °C, pH of 8, and 300 rpm. Meanwhile, 72 of the HREEs were recovered at a temperature of 30 °C, pH of 7, and 200 rpm. It was observed that Na2CO3 was effective in precipitating rare earth elements (REEs) at higher temperatures, whereas NH4OH was better at precipitating the HREEs from an REE-nitrate solution under the same processing conditions. Graphical Abstract: Figure not available: see fulltext.. © 2021, The Minerals, Metals & Materials Society.
Item Type: | Article |
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Additional Information: | Cited by: 5 |
Uncontrolled Keywords: | Ammonium hydroxide; Precipitation (chemical); Purification; Rare earth elements; Rare earths; Silicate minerals; Sodium Carbonate; Temperature; Zircon; Effects of temperature; Heavy rare earth elements; Light rare earth elements; Oxalate precipitation; Precipitation efficiency; Precipitation process; Processing condition; Rare earth elements (REEs); Sodium compounds |
Subjects: | T Technology > TP Chemical technology |
Divisions: | Faculty of Engineering > Chemistry Engineering Department |
Depositing User: | Sri JUNANDI |
Date Deposited: | 01 Oct 2024 12:23 |
Last Modified: | 01 Oct 2024 12:23 |
URI: | https://ir.lib.ugm.ac.id/id/eprint/4191 |