Kinetics of zinc(ii) extraction from model hydrochloric acid solutions in the lewis cell

• Autorzy: Niemczewska J. , Alejski K. , Szymanowski J.
• Języki publikacji: EN

Abstrakty

EN

Extraction of zinc(II) from model hydrochloric acid solutions was studied in the Lewis cell mixing the bulks of both phases and keeping a stable interfacial surface. Equilibrium extraction data were obtained in a classical way described in previous papers. All experiments were carried out at room temperature. MEDUSA program was used to estimate the distribution of zinc(II) chlorocomplexes in the aqueous feed. In the aqueous feed, zinc(II) is mainly in the form of (92 mole %). The contents of and are estimated as equal to 8 and 0 mole %, respectively. It was found that the Lewis cell experiments, although dynamic in nature, support the extraction of ZnCl2×2TBP chlorocomplex from model solutions containing 5 M Cl- and 0.55 M H+. The fluxes and mass transfer coefficients were estimated using two-layer model of mass transfer. The initial fluxes of zinc(II), HCl, Cl-, chloride present in the zinc(II) complex and water depend upon the concentration of tributyl phosphate and the mixing rates. The diffusion step in the organic phase gives a higher resistance to the mass transfer than the diffusion step in the aqueous phase. The physical transfer of small water molecules is less sensitive to the mixing rates than the transfer of bulky zinc(II) chlorocomplex.

Słowa kluczowe

EN

mass transfer; Lewis cell; zinc extraction

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2005
• Tom: Vol. 31, nr 3-4
• Strony: 83--92
• Opis fizyczny: Bibliogr. 13 poz., tab., rys.

Twórcy

autor

Niemczewska J.

• Poznań University of Technology, Institute of Chemical Technology and Engineering, pl. Marii Skło-dowskiej-Curie 2, 60-956 Poznań, Poland

autor

Alejski K.

• Poznań University of Technology, Institute of Chemical Technology and Engineering, pl. Marii Skło-dowskiej-Curie 2, 60-956 Poznań, Poland

autor

Szymanowski J.

• Poznań University of Technology, Institute of Chemical Technology and Engineering, pl. Marii Skło-dowskiej-Curie 2, 60-956 Poznań, Poland

Bibliografia

• [1] SCHÜGERL K., LARM A., GUDORF M., Recovery of Zinc from Zinc Mordant Solutions of Dovetail Plants, ISEC Melbourne, Australia, 1996, pp. 1543–1547.
• [2] BART H.J., Reactive Extraction, Springer, Berlin, 2000.
• [3] ANDERSON S.O.S., REINHARDT H., Recovery of metals from liquid effluents, [in:] Handbook of Solvent Extraction, Lo T. C., Handson C., Baird M. H. (Eds.), John & Sons, New York, 1983, Chapter 25.10.
• [4] REGEL M., SASTRE A.M., SZYMANOWSKI J., Recovery of Zinc(II) from HCl Spent Pickling Solutions by Solvent Extraction, Environ. Sci. Technol., 2001, 35, pp. 630–635.
• [5] CIERPISZEWSKI R., MIESIĄC I., REGEL-ROSOCKA M., SZYMANOWSKI J., Removal of Zinc(II) from Spent Hydrochloric Solutions from Zinc Hot Galvanizing Plants, Ind. Eng. Chem. Res., 2002, 41, pp. 598–603.
• [6] BARTKOWSKA M., REGEL-ROSOCKA M., SZYMANOWSKI J., Extraction of zinc(II), iron(III) and iron(II) with binary mixtures containing tributyl phosphate and di(2-ethylhexyl)phosphoric acid or cyanex 302, Physicochem. Problems Min. Proc., 2002, 36, pp. 217–224.
• [7] REGEL-ROSOCKA M., ZAWISTOWSKI P., SASTRE A.M., SZYMANOWSKI J., Selection of Extractants for Dispersive Extraction of Zinc(II) from Hydrochloric Acid Solution, Pol. J. Appl. Chem., 2003, 47, pp. 83–94.
• [8] NAVRATIL J.M., Handbook Science and Technology of Tributyl Phosphate, CRC Press, Inc. Boca Raton, Florida, 1987.
• [9] TÓRZ M., ALEJSKI K., SZYMANOWSKI J., Recovery of Zinc(II) from Model Hydrochloric Acid Solutions in Hollow Fibre Modules, Physicochem. Problems Min. Proc., 2002, 36, pp. 101–113.
• [10] TÓRZ M., ALEJSKI K., SZYMANOWSKI J., Modeling of Zinc(II) Extraction from Model Hydrochloric Acid Solution in Hollow Fibre Modules, Physicochem. Problems Min. Proc., 2003, 37, pp. 97–105.
• [11] NIEMCZEWSKA J., CIERPISZEWSKI R., SZYMANOWSKI J., Mass transfer of zinc(II) extraction from hydrochloric acid solution in the Lewis cell, Desalination, 2004, 162, pp. 169–177.
• [12] PLUCIŃSKI P., NITSCH W., Two Phases Kinetics of the Solubilization in Reversed Micelles, Solvent Extraction, Elsevier Science Publishers BV, 1992, pp. 847–852.
• [13] PUIDDOMENECH I., Medusa, Royal Institute of Technology, Sweden.