Oxoacidity reactions in molten LiCl+KCl eutectic (at 470°C): Potentiometric study of the equilibria of exchange of O2− between Al(III) systems and carbonate and water systems |
| |
| Authors: | G. Picard F. Seon B. Tremillon |
| |
| Affiliation: | Laboratoire d''Electrochimie Analytique et Appliquée, Laboratoire associé au C.N.R.S. no. 216, Ecole Nationale Supérieure de Chimie de Paris, Université Pierre et Marie Curie, 11, rue Pierre et Marie Curie, F. 75231-Paris Cedex 05 France |
| |
| Abstract: | The reactions between aluminium chloride and oxide anion were studied in molten LiCl+KCl eutectic at 470°C. For that purpose, a pO2? indicator electrode made with a membrane in yttria-stabilized zirconia has been used and tested by means of a carbonate ion whose dissociation constant, 10?2.15 atm, was determined. Then, the electrode has allowed us to obtain the formation constant of AlO+ (solvated by Cl?) and the solubility product of Al2O3 (S): 1010.7 and 10?27.4, respectively (molality scale). The equilibrium constant of the following system: 2HCl (g)+O2? agH2O (g)+2Cl? has also been determined: 10?9.93 atm mol kg?1. The conditional solubility of alumina in LiCl+KCl melt is discussed. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
