Hydrometallurgical Recovery of Rare Earth Metals from Spent FCC Catalysts

book chapter Hydrometallurgical Recovery of Rare Earth Metals from Spent FCC Catalysts published yes M. Wenzel author Kathleen Schnaars author 117735 N. Kelly author L. Götzke author S. M. Robles author K. Kretschmer author Phuc Nguyen Le author Dang Thanh Tung author Nguyen Huu Luong author Nguyen Anh Duc author Dang Van Sy author K. Gloe author J. J. Weigand author 985 department The recovery of rare earth metals from secondary sources has attracted much attention due to their ever expanding demand in the high-tech industry. The studies reported here focus on the hydrometallurgical recovery of lanthanum and cerium from spent fluid catalytic cracking (FCC) catalysts in a two-step process: leaching with nitric acid and solvent extraction by tri-n-butyl phosphate (TBP) and di(2-ethylhexyl)phosphoric acid (D2EHPA). The experiments show a high dissolution yield of about 93% lanthanum and 42% cerium in a single leaching step with 2 M (126 g/L) HNO3 at 80 °C; only 11% aluminum has been dissolved simultaneously. In the subsequent solvent extraction step the best results for this leach liquor could be achieved using a 1:1 mixture of 25% (v/v) TBP (0.92 M) and 25% (v/v) D2EHPA (0.76 M) in n-decane without the need for any pH adjustment. In that case La(III) and Ce(III) can be extracted with 60% and 74% yield respectively in one stage from the majority of accompanying matrix elements. In particular no extraction of Al(III) could be observed under these conditions. Springer International Publishing2016 eng Rare Metal Technology 2016 9783319486161 978331948135710.1007/978-3-319-48135-7_4 yes @inbook{Wenzel_Schnaars_Kelly_Götzke_Robles_Kretschmer_Le_Tung_Luong_Duc_et al._2016, place={Cham}, title={Hydrometallurgical Recovery of Rare Earth Metals from Spent FCC Catalysts}, DOI={<a href="https://doi.org/10.1007/978-3-319-48135-7_4">10.1007/978-3-319-48135-7_4</a>}, booktitle={Rare Metal Technology 2016}, publisher={Springer International Publishing}, author={Wenzel, M. and Schnaars, Kathleen and Kelly, N. and Götzke, L. and Robles, S. M. and Kretschmer, K. and Le, Phuc Nguyen and Tung, Dang Thanh and Luong, Nguyen Huu and Duc, Nguyen Anh and et al.}, year={2016} } Wenzel M, Schnaars K, Kelly N, et al. Hydrometallurgical Recovery of Rare Earth Metals from Spent FCC Catalysts. In: Rare Metal Technology 2016. Springer International Publishing; 2016. doi:<a href="https://doi.org/10.1007/978-3-319-48135-7_4">10.1007/978-3-319-48135-7_4</a> Wenzel, M., et al. “Hydrometallurgical Recovery of Rare Earth Metals from Spent FCC Catalysts.” Rare Metal Technology 2016, Springer International Publishing, 2016, doi:<a href="https://doi.org/10.1007/978-3-319-48135-7_4">10.1007/978-3-319-48135-7_4</a>. M. Wenzel, K. Schnaars, N. Kelly, L. Götzke, S.M. Robles, K. Kretschmer, P.N. Le, D.T. Tung, N.H. Luong, N.A. Duc, D.V. Sy, K. Gloe, J.J. Weigand, in: Rare Metal Technology 2016, Springer International Publishing, Cham, 2016. Wenzel, M., Kathleen Schnaars, N. Kelly, L. Götzke, S. M. Robles, K. Kretschmer, Phuc Nguyen Le, et al. “Hydrometallurgical Recovery of Rare Earth Metals from Spent FCC Catalysts.” In Rare Metal Technology 2016. Cham: Springer International Publishing, 2016. <a href="https://doi.org/10.1007/978-3-319-48135-7_4">https://doi.org/10.1007/978-3-319-48135-7_4</a>. M. Wenzel et al., “Hydrometallurgical Recovery of Rare Earth Metals from Spent FCC Catalysts,” in Rare Metal Technology 2016, Cham: Springer International Publishing, 2016. Wenzel, M., Schnaars, K., Kelly, N., Götzke, L., Robles, S. M., Kretschmer, K., Le, P. N., Tung, D. T., Luong, N. H., Duc, N. A., Sy, D. V., Gloe, K., & Weigand, J. J. (2016). Hydrometallurgical Recovery of Rare Earth Metals from Spent FCC Catalysts. In Rare Metal Technology 2016. Springer International Publishing. <a href="https://doi.org/10.1007/978-3-319-48135-7_4">https://doi.org/10.1007/978-3-319-48135-7_4</a> 628572025-12-04T12:15:35Z2025-12-04T12:19:23Z