Abstract
The raffinate obtained after extracting scandium from titanium dioxide waste acid (hereafter, waste acid-A) contains a lot of valuable components. The extraction separation process of Ti(IV) and Fe(II) from the raffinate using a D2EHPA-sulfonated kerosene extraction system was studied under different conditions. The results showed that the Ti(IV) extraction rate was 100% with 1.66% Fe(II) co-extracted using 30% D2EHPA with an O/A rate of 1:2 at 30°C for 20 min in a two-stage countercurrent test. Then, the extracted Ti(IV) was stripped with NH4HF2 solution. Under the optimal conditions, all the Ti(IV) was stripped, together with the stripping of 14.52% Fe(II). Moreover, the reaction mechanism of Ti(IV) with D2EHPA in sulfuric acid medium was determined using the results of the saturation capacity method and FT-IR analysis. Ti(IV) was extracted in the form of (TiO)2A6H2. Finally, a conceptual flow chart for recovering relatively high-purity titanium from the raffinate has been innovatively proposed.
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References
V.I. Lakshmanan, R. Sridhar, T. Sheikhzeinoddin, M.A. Halim, and R. Roy, TMS, 295 (2012).
R.K. Singh, and P.M. Dhadke, J. Serb. Chem. Soc. 67, 507 (2002).
J. Zhou, Q. Yu, Y. Huang, J.J. Meng, Y.D. Chen, S.Y. Ning, X.P. Wang, Y.Z. Wei, X.B. Yin, and J. Liang, Hydrometallurgy 195, 105398 (2020).
J. Yang, and Z.H. Zhang, Met. Mine 12, 52 (in Chinese) (1999).
C. Li, B. Liang, and L.H. Guo, Hydrometallurgy 89, 1 (2007).
D.Q. Li, and C. Wang, Hydrometallurgy 48, 301 (1998).
D. Zou, H.L. Li, J. Chen, and D.Q. Li, Hydrometallurgy 197, 105463 (2020).
Y.H. Li, Q.G. Li, G.Q. Zhang, L. Zeng, Z.Y. Cao, W.J. Guan, and L.P. Wang, Hydrometallurgy 178, 1 (2018).
K.C. Sole, Hydrometallurgy 51, 239 (1999).
X.L. Hao, L. Lv, B. Liang, C. Li, P. Wu, and J. Wang, Hydrometallurgy 113–114, 185 (2012).
K.C. Sole, Hydrometallurgy 51, 263 (1999).
J. Jayachandran, and P.M. Dhadke, J. Chem. Eng. Jpn. 31, 465 (1998).
G.C. da Silva, J.W.S.D. da Cunha, J. Dweck, and J.C. Afonso, Mineral Eng. 21, 416 (2008).
R.K. Biswas, M.R. Zaman, and M.N. Islam, Hydrometallurgy 63, 159 (2002).
P.N. Phalke, A.V. Sherikar, and P.M. Dhadke, Indian J. Chem. Sect. A 36, 446 (1997).
F. Islam, H. Rahman, and M. Ali, J. Inorg. Nucl. Chem. 41, 217 (1979).
L.L. Zhang, T.A. Zhang, G.Z. Lv, W.G. Zhang, T.T. Li, and X.J. Cao, JOM 73, 1301 (2021).
W.G. Zhang, T.A. Zhang, G.Z. Lv, W.H. Zhou, X.J. Cao, and H.Y. Zhu, JOM 70, 2837 (2018).
T. Sato, Sigen-to-Sozai 119, 175 (2003).
Y. Zhang, T.A. Zhang, G.Z. Lv, G.Q. Zhang, Y. Liu, and W.G. Zhang, Hydrometallurgy 166, 87 (2016).
Z.N. Lou, X. Xiao, Y. Xiong, and Y.C. Zhai, Trans. Nonferrous Met. Soc. China 29, 397 (2019).
S.H. Yin, W.Y. Wu, X. Bian, and F.Y. Zhang, Hydrometallurgy 131–132, 133 (2013).
T. Sato, and T. Nakamura, Anal. Chim. Acta 76, 401 (1975).
S.F. Weng, and Y.Z. Xu, Analysis of Fourier Transform Infrared Spectra, 3ed edn. (Chemical Industry Press, Beijing, 2016).
Z.H. Chen, and C.H. Liu, Titanium Dioxide Production and Application Technology (Chemical Industry Press, Beijing, 2005).
Acknowledgements
The authors express sincere thanks to the National Natural Science Foundation of China (No. 51874078) and the Fundamental Research Funds for the Central Universities (No. N182504018) for financial support. The author was also thankful to lecturer Zhang Weiguang for his revision of the English Text.
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Zhang, L., Zhang, Ta., Lv, G. et al. Extraction Separation of Ti(IV) and Fe(II) Using D2EHPA from the Raffinate Obtained After Extraction of Scandium from Titanium Dioxide Waste Acid. JOM 74, 1061–1069 (2022). https://doi.org/10.1007/s11837-021-05118-7
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DOI: https://doi.org/10.1007/s11837-021-05118-7