Preliminary Study of the Effect of pH on Ce, Nd, La, Pr Recovery from REOH Concentrate

Abstract:

The separation of uranium, thorium, and rare earth elements (REE) from monazite sand was carried out using the PLUTHO pilot plant facility. The REEs were produced in the form of hydroxide concentrates (REOH). Further separation process must be carried out to obtain high-purity elements for application in advanced industries such as polisher material for hard materials, infrared protective glass, and Ni-metal hydride batteries. The Major Element of REEs are Cerium (Ce), Lanthanum (La), Neodynium (Nd), and Praseodymium (Pr). Those elements can be separated by various methods such as fractional precipitation, extraction, ion exchange, and others. This research was carried out using the Fractional Precipitation method. Rare earth elements have chemical properties that permit ready dissolution and easy precipitation. The fractional precipitating reagent commonly used is NH₄OH because it will not contaminate the precipitate due to the volatility of NH_3. The parameter used in this preliminary study was pH from 4 to 9. The separation process was started with the dissolution of the REOH concentrate in a solution of HNO₃ to obtain RE nitrate. After the dissolution process, oxidation and precipitation were carried out by the addition of KMnO₄ as an oxidizing agent and Na₂CO₃ as a precipitating agent at pH 4 to obtain high recovery efficiency of cerium. The precipitation was pH varies continued by pH adjustment using NH₄OH starting from pH 4 to pH 9 to separate La, Nd, and Pr. The analysis of Ce, La, Nd, and Pr concentration was carried out using ICP-OES. The optimum pH recovery for Ce, Nd, and Pr was found at pH 4 with a concentration of 19986.4 ppm, 3532.34 ppm, and 3796.81 ppm, respectively, while at pH 8.5 for La with a concentration of 5846.59 ppm.

• Periodical: Materials Science Forum (Volume 1113)
• Pages: 133-138
• DOI: https://doi.org/10.4028/p-itcI3E
• Online since: February 2024
• Authors: Nizar Kamil Perwira*, Nofriady Aziz, Kris Tri Basuki, Septian Hardi, Ratih Langenati, Intan Nurhimawati, Kukuh Ario Baskoro, Muhammad Ilham Baqyuni
• Keywords: Fractional Precipitation, pH Basis, Rare Earth Elements Separation

References

[1] Pusat Sumber Daya Mineral Batubara dan Panas Bumi, Potensi Logam Tanah Jarang Di Indonesia, 1st ed., Kementerian Energi dan Sumber Daya Mineral, Bandung, 2019.

DOI: 10.21787/mp.3.2.2019.109-118

[2] Pusat Data dan Teknologi Informasi Energi dan Sumber Daya Mineral, Kajian Potensi Mineral Ikutan Pada Pertambangan Timah, Kementerian Energi dan Sumber Daya Mineral, Jakarta, 2017.

DOI: 10.21787/mp.3.2.2019.109-118

[3] D. Yan, S. Ro, S. O, S. Kim, On the Global Rare Earth Elements Utilization and Its Supply-Demand in the Future, in: Earth Environ. Sci., IOP Publishing, 2020.

DOI: 10.1088/1755-1315/508/1/012084

[4] Q. He, Experimental study on polishing performance of CeO2 and nano-SiO2 mixed abrasive, Appl. Nanosci. 8 (2018) 163–171.

DOI: 10.1007/s13204-018-0657-4

[5] J.A. Mcneice, An Investigation Into Cerium Oxidation Under Acidic Conditions, Queen's University, 2018.

[6] C.K. Gupta, N. Krishnamurthy, Extractive Metallurgy of Rare Earths, CRC Press, New York, 2005.

[7] Y. Wu, M. Song, Q. Zhang, W. Wang, Review of rare-earths recovery from polishing powder waste, Resour. Conserv. Recycl. 171 (2021).

[8] F. Xie, T.A. Zhang, D. Dreisinger, F. Doyle, A critical review on solvent extraction of rare earths from aqueous solutions, Miner. Eng. 56 (2014) 10–28.

DOI: 10.1016/j.mineng.2013.10.021

[9] M.E. De Vasconcellos, C.A.D.S. Queiroz, A. Abrão, Sequential separation of the yttrium - Heavy rare earths by fractional hydroxide precipitation, J. Alloys Compd. 374 (2004) 405–407.

DOI: 10.1016/j.jallcom.2003.11.038

[10] M.. Purwani, K. Trinopiawan, H. Poernomo, Suyanti, N. Pusporini, R.A. Amiliana, Separation of Ce, La and Nd in rare earth hydroxide (REOH) by oxidation with potassium permanganate and precipitation, J. Phys. 1198 (2019) 32003. https://doi.org/.

DOI: 10.1088/1742-6596/1198/3/032003

[11] R.D. Abreu, C.A. Morais, Purification of rare earth elements from monazite sulphuric acid leach liquor and the production of high-purity ceric oxide, Miner. Eng. 23 (2010) 536–540.

DOI: 10.1016/j.mineng.2010.03.010

[12] T. Handini, B. Ehb, S. Sukmajaya, D. Biyantoro, Pembuatan Y Oksida Melalui Proses Pengendapan, in: Prosiding Seminar Nasional Teknologi Energi Nuklir, 2016: p.281–288.

[13] A. Novriyanisti, R. Prassanti, K.S. Widana, Pemisahan Unsur-unsur pada Monasit Bangka dengan Pengendapan Bertingkat, Eksplorium. 42 (2021) 69-76.

DOI: 10.17146/eksplorium.2021.42.1.6093

[14] I. Hastiawan, F. Firmansyah, Juliandri, D.R. Eddy, A.R. Noviyanti, Pemisahan Lanthanum Dari Limbah Hasil Pengolahan Timah Dengan Menggunakan Metode Pengendapan Bertingkat, Chim. Nat. Acta. 4 (2016) 93–96. https://doi.org/.

DOI: 10.24198/cna.v4.n2.10678

[15] A. Yulandra, I.M. Bendiyasa, H.T. Bayu, Optimasi Pembuatan Konsentrat Y(OH)3 Dan Nd(OH)3 Dari Konsentrat Tailing Zirkon Dengan Metode: "Response Surface Methodology, Universitas Gadjah Mada, 2020.

DOI: 10.32423/jmi.2020.v42.28-34

[16] S. Effendi, A. Mutalib, A. Anggraeni, H.H. Bahti, Penggunaan Desain Plackett Burman untuk Seleksi Parameter Pemisahan Logam Tanah Jarang Kelompok Sedang dari Logam Tanah Jarang Kelompok Lainnya dengan Metode Pengendapan., Al-Kimiya. 7 (2020) 1–6.

DOI: 10.15575/ak.v7i1.6486

[17] T. Moeller, H.. Kremers, The Basicity Characteristics of Scandium, Yttrium, and the Rare Earth Elements, Chem. Rev. 37 (1945) 97–159. https://doi.org/.

DOI: 10.1021/cr60116a003

[18] D. Qi, Chemical Separation Method1. Qi D. Chemical Separation Method. In: Qi DBT-H of RE, editor. Hydrometallurgy of Rare Earths [Internet]. Elsevier; 2018. p.671–741. Available from: https://linkinghub.elsevier.com/retrieve/pii/B9780128139202000076, in: D.B.T.-H. of R.E. Qi (Ed.), Hydrometall. Rare Earths, Elsevier, 2018: p.671–741.

DOI: 10.1016/B978-0-12-813920-2.00007-6

[19] N.I. Perwira, K.T. Basuki, D. Biyantoro, N. Effendy, Optimization Recovery of Yttrium Oxide in Precipitation, Extraction, and Stripping Process, in: IOP Conf. Ser. Mater. Sci. Eng., 2018.

DOI: 10.1088/1757-899X/349/1/012044