Abstract
The ion exchange processes of\(\bar H^ + --Li^ + \) (OAc−) and\(\overline {Li} ^ + --H^ + \) (OAc−) proceeding in shell-core inorganic ion exchanger Ti (HPO4)2·1/2H2O has been studied and the diffusion equation whose boundary conditions are satisfied by a shell-core model was solved. Based on the equation solved and experimental data, the diffusion coefficients corresponding to the exchange process\(\bar H^ + --Li^ + \) (OAc−) and Li+−H+ (OAc−) at 17°C are found to be 7.7×10−9 and 6.2×10−8 cm2 s−1 and the activation energies 3.4×104 and 5.0×103 J mol−1, respectively. Compared to the gel type of styrene-divinylbenzene strong acid exchanger with 20% cross linking, it can be concluded that the rate of\(\bar H^ + --Li^ + \) or\(\overline {Li} ^ + --H^ + \) exchange is 3.5 times faster than that in the organic exchanger.
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References
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TIP was obtained from the Salt Lake Institute of the Academy of Science of China.
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Tingsheng, Y., Ling, Q., Yongli, M. et al. Mass transfer in shell-core inorganic TIP1 ion exchanger. Journal of Radioanalytical and Nuclear Chemistry Letters 166, 321–329 (1992). https://doi.org/10.1007/BF02163838
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DOI: https://doi.org/10.1007/BF02163838