Thermodynamic treatment of H+/K+ ion-exchange on γ-titanium phosphate

作者: R. Llavona , J.R. García , M. Suárez , J. Rodríguez

DOI: 10.1016/0040-6031(86)80045-4

关键词:

摘要: Abstract The H + /K ion-exchange process in γ-Ti(HPO 4 ) 2 ·2H O was studied, titration and hydrolysis curves exchange isotherms being obtained at 278.15, 298.15, 313.15 328.15 (±0.1) K. Three differentiated processes of substitution crystalline phases 25, 50 100% conversion were reached. equilibrium constants, the standard molar Gibbs free energies, enthalpies entropies reaction determined.

参考文章(16)
G. Alberti, M.G. Bernasconi, M. Casciola, U. Costantino, Crystalline insoluble acid salts of tetravalent metals—XXXIV Journal of Inorganic and Nuclear Chemistry. ,vol. 42, pp. 1637- 1640 ,(1980) , 10.1016/0022-1902(80)80329-0
G. Alberti, U. Costantino, M.L. Luciani Giovagnotti, Ion-exchange properties of γ-titanium phosphate and its monosodium forms towards Mg2+ and Ca2+ ions Journal of Chromatography A. ,vol. 201, pp. 175- 185 ,(1980) , 10.1016/S0021-9673(00)83872-8
Giulio Alberti, Umberto Constantino, Recent progress in the field of synthetic inorganic exchangers having a layered or fibrous structure Journal of Chromatography A. ,vol. 102, pp. 5- 29 ,(1974) , 10.1016/S0021-9673(01)85423-6
Etsuro Kobayashi, Shinsuke Yamazaki, Studies of Inorganic Ion Exchangers. VI. The Formation Region and Dehydration Behavior of Various Titanium(IV) Bis(hydrogenorthophosphate) Hydrates Bulletin of the Chemical Society of Japan. ,vol. 56, pp. 1632- 1636 ,(1983) , 10.1246/BCSJ.56.1632
R. Llavona, J.R. García, M. Suárez, J. Rodríguez, Synthesis of γ-titanium phosphate. study of the solids obtained by using water or acetone as washing agents Thermochimica Acta. ,vol. 86, pp. 281- 289 ,(1985) , 10.1016/0040-6031(85)87056-8
George L. Gaines, Henry C. Thomas, Adsorption Studies on Clay Minerals. II. A Formulation of the Thermodynamics of Exchange Adsorption The Journal of Chemical Physics. ,vol. 21, pp. 714- 718 ,(1953) , 10.1063/1.1698996
A. Clearfield, Robert H. Blessing, James A. Stynes, New crystalline phases of zirconium phosphate possessing ion-exchange properties Journal of Inorganic and Nuclear Chemistry. ,vol. 30, pp. 2249- 2258 ,(1968) , 10.1016/0022-1902(68)80224-6
A. Clearfield, J.A. Stynes, The preparation of crystalline zirconium phosphate and some observations on its ion exchange behaviour Journal of Inorganic and Nuclear Chemistry. ,vol. 26, pp. 117- 129 ,(1964) , 10.1016/0022-1902(64)80238-4
G. Alberti, P. Cardini-Galli, U. Costantino, E. Torracca, Crystalline insoluble salts of polybasic metals—I Ion-exchange properties of crystalline titanium phosphate Journal of Inorganic and Nuclear Chemistry. ,vol. 29, pp. 571- 578 ,(1967) , 10.1016/0022-1902(67)80063-0
C.G Guarido, M Suarez, J.R Garcia, R Llavona, J Rodriguez, Thermodynamic treatment and calorimetric study of H+Li+ion exchange on α-titanium phosphate The Journal of Chemical Thermodynamics. ,vol. 17, pp. 63- 68 ,(1985) , 10.1016/0021-9614(85)90032-1