Extraction Kinetics and Mechanism of La(III) by P204-Kerosine from Phosphoric Acid

Abstract:

The extraction kinetics and mechanism of La (III) by P204-kerosine from phosphoric acid were investigated by constant interfacial cell with laminar flow. The effects of stirring speed, temperature, specific interface area on extraction rate were studied. The results indicated that a plateau region is appeared at the stirring speed of over 115r/min. The extraction apparent activation energy was calculated to be-13.40kJ/mol and the extraction process is controlled by a mixed mechanism of diffusion and chemical reaction. The rate equation of extraction was deduced. Under conditions of 25°C and interfacial area 19.64cm2, the extraction rate constant was 2.08×10-6 m·s-1·. Through the derivation of the reaction mechanism the reaction zone is at the liquid-liquid interface.

• Periodical: Advanced Materials Research (Volumes 881-883)
• Pages: 677-682
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.881-883.677
• Online since: January 2014
• Authors: Yun Shan Xiao, Ya Gu Dang*, De Jun Fei, Ying Zhang
• Keywords: Constant Interfacial Cell, Di-2-ethylhexyl Phosphoric Acid (P204), Kinetic, La, Mechanism

References

[1] J. Zhang, Q. Zhang, D.L. Chen: Geology and prospecting, Vol. 40(2004), pp.41-44.

[2] L.S. Wang, Z.Q. Long, X.W. Huang, Y. Ying, D.L. Cui, C.Z. Guo: Hydrometallurgy, Vol. 101, (2010), p.41.

[3] L.S. Wang, X.L. Peng, M.H. Li, X.W. Huang, Z.Q. Long, D.L. Cui: Journal of the Chinese rare earth society, Vol. 27(2009), pp.812-815.

[4] H. Wang, Y.F. Jia, Y Wei, HR Li, HF Cong, JY Pan: Journal of Nuclear and Radiochemistry, Vol. 32(2010), pp.193-198.

[5] R.K. Biswas, M.A. Habib: Solvent Extr. Ion Exch., Vol. 25(2007), p.79–98.

[6] N.E. EI-Hefny: Chemical Engineering and Processing, Vol. 49(2010), p.84–90.

[7] M.L.P. Reddy, T.P. Rao, A.D. Damodaran: Miner. Process. Extr. Metall. Rev., Vol. 12(1995), p.91–113.

[8] J.N. Li, X.W. Huang, Z.W. Zhu, Z.Q. Long, X.L. Peng, D.L. Cui: Journal of the Chinese rare earth society, Vol. 25(2007), pp.55-58.

[9] N.E. EI-Hefny: Chemical Engineering and Processing, Vol. 46(2007), p.623–629.

[10] Y.G. Wang, S.T. Yue: Solvent Extr. Ion Exch., Vol. 20(2002), pp.345-358.

[11] Y. Xiong, Y.G. Wang: Solvent Extr. Ion Exch., Vol. 22(2004), p.833–851.

[12] D. Qian, C.L. Cai, K.Y. Wang: Chin. J . Rare Metals, Vol. 26(2002), pp.73-74.

[13] P.R. Danesi, R. Chirizia: Crit. Rev. Anal. Chem., Vol. 10(1980), pp.121-126.

[14] J.H. Espenson, in: Chemical Kinetics and Reaction Mechanisms, edtied by McGraw-Hill, (1981).

[15] J. Wang, Y.G. Dang, D.J. Fei, W.J. Fan, W.W. Dong: Journal of the Chinese society of rare earths, Vol. 30 (2012), pp.13-19.

[16] W.J. Fan, Y. G Dang, D.J. Fei, Y. Liu: Membr. Sci. Technol., Vol. 32(2012), pp.46-51.

[17] M. Krea, H. Khalaf: Hydrometallurgy, Vol. 58(2000), pp.215-225.

[18] M. Saidi, H. Khalaf: Hydrometallurgy, Vol. 74(2004), pp.85-91.