Perhitungan Stage Mixer Settler untuk Pemurnian Torium (Th) dari Pelarutan Monasit
DOI: http://dx.doi.org/10.55981/eksplorium.2018.4524
Abstract
ABSTRAK
Monasit (Ce, La, Nd, Th,)PO4 dengan kandungan torium (Th) antara 3-4% cukup signifikan untuk diproses menghasilkan Th. Pengolahan awal dilakukan dengan pelindian monasit menggunakan reagen basa karbonat (Na2CO3) untuk mengambil uraniumnya. Sisa tailing dilarutkan dengan asam sulfat untuk menghasilkan larutan Th(SO4)2 yang kemudian dimurnikan dari unsur-unsur pengotornya. Pengolahan dilakukan secara kontinyu menggunakan mixer settler dengan tahapan proses meliputi proses ekstraksi Th, stripping Th dan regenerasi pelarut organik. Ekstraksi Th menggunakan pelarut organik Primene JM-T (RNH2) yang merupakan campuran dari 0,15M Primene JM; 5% Tridecanol; dan 95% Kerosin. Sementara itu, proses stripping Th menggunakan larutan 2M HCl. Untuk efisiensi maka regenerasi pelarut organik menggunakan 1% H2SO4. Untuk mendapatkan recovery dan kemurnian yang tinggi dari Th, penghitungan jumlah stage mixer settler diperlukan dengan menggunakan metode McCabe Thiele. Dari hasil perhitungan diperoleh jumlah stage dalam proses ekstraksi Th adalah 3, proses stripping Th adalah 3 dan regenerasi pelarut organik adalah 2. Recovery total Th sebesar 84,90% diperoleh dengan kemurnian produk mencapai 99,02%.
ABSTRACT
Monazite (Ce, La, Nd, Th)PO4 with thorium (Th) content between 3-4 % is significant enough to be processed to produce Th. The initial treatments conducted by using carbonate base reagents (Na2CO3) for monazite leaching to fetch the uranium. The remaining tailings were dissolved with sulfuric acid to produce Th(SO4)2 solution which is then purified from its impurities. The processing is carried out continuously using a mixer settler with the process steps include Th extraction, Th stripping, and organic solvents regeneration. Thorium extraction uses a primene JM-T (RNH2) organic solvent which is a mixture of 0.15M Primene JM; 5% Tridecanol and 95% Kerosine. Meanwhile, the Th stripping process uses 2M HCl solution. For efficiency, regeneration of organic solvents uses 1% H2SO4. To obtain a high recovery and purity from Th, it is necessary to calculate the number of stage mixer settlers using the McCabe Thiele method. Based on the calculation, the number of stage for extraction process, Th stripping, and organic solvents regeneration are 3, 3, and 2 respectively. The total recovery of Th is obtained at 84.90 % where product purity reaches 99.02 %.
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[1] E. Suwargi, B. Pardiarto, and T. Ishlah, “Potensi Logam Tanah Jarang di Indonesia,” Bul. Sumber Daya Geol., vol. 5, pp. 131–140, 2010.
[2] Sumarni, R. Prassanti, K. Trinopiawan, Sumiarti, and H. L. Nuri, “Penentuan Kondisi Pelarutan Residu dari Hasil Pelarutan Parsial Monasit Bangka,” Eksplorium, vol. 32, no. 2, pp. 115–124, 2011.
[3] M. Anggraini, Sumarni, Sumiarti, Rusyidi, and Sugeng, “Pengendapan Unsur Tanah Jarang Hasil Digesti Monasit Bangka Menggunakan Asam Sulfat,” Eksplorium, vol. 33, no. 2, pp. 121–128, 2012.
[4] K. Trinopiawan and Sumiarti, “Pemisahan Thorium dari Uranium pada Monasit dengan Metode Pengendapan,” Eksplorium, vol. 33, no. 1, pp. 55–62, 2012.
[5] R. Prassanti, “Digesti Monasit Bangka dengan Asam Sulfat,” Eksplorium, vol. 33, no. 1, pp. 41–54, 2012.
[6] H. L. Nuri, Prayitno, A. Jami, and M. Pancoko, “Kebutuhan Desain Awal pada Pilot Plant Pengolahan Monasit Menjadi Thorium Oksida (ThO2),” Eksplorium, vol. 35, no. 2, pp. 131–141, 2014.
[7] R. Ferliana, B. Wasito, and R. Prassati, “Ekstraksi dan Stripping Torium dari Rafinat Hasil Ekstraksi Uranium Monasit Bangka,” J. Forum Nukl., vol. 10, no. 1, pp. 26–37, 2016.
[8] J. C. B. S. Amaral and C. A. Morais, “Thorium and Uranium Extraction from Rare Earth Elements in Monazite Sulfuric Acid Liquor Through Solvent Extraction,” Miner. Eng., vol. 23, no. 6, pp. 498–503, May 2010.
[9] M. E. Nasab, “Solvent Extraction Separation of Uranium (VI) and Thorium (IV) with Neutral Organophosphorus and Amine Ligands,” Fuel, vol. 116, pp. 595–600, Jan. 2014.
[10] F. Xie, T. A. Zhang, D. Dreisinger, and F. Doyle, “A Critical Review on Solvent Extraction of Rare Earths from Aqueous Solutions,” Miner. Eng., vol. 56, pp. 10–28, Feb. 2014.
[11] G. Towler and R. Sinnott, Chemical Engineering Design, 1st ed. New York, 2008.
[12] M. Pancoko, “Perhitungan Neraca Massa Tailing Monasit,” Tangerang Selatan, 2015.
[13] Prayitno, “Perhitungan Teknis Peralatan Utama Proses 2,” Tangerang Selatan, 2015.
[14] D. W. Green and R. H. Perry, Perry’s Chemical Engineers’ Handbook, 8th ed. New York, Singapore: McGraw-Hill, 2008.
[15] G. E. Saputro, “Revisi Perhitungan Neraca Massa Tailing Monasit,” Tangerang Selatan, 2017.
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