Abstract
The dissolution rate of aluminum hydroxide in sulfuric and hydrochloric acids was studied as a function of acid concentration, solution temperature, and the hydroxide/electrolyte interfacial potential. It was found to be limited by the transfer of surface complexes from the solid phase to the solution.
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Abbreviations
- A :
-
optical density of the filtrate at an instant in timet
- A ∞ :
-
optical density of the filtrate after complete dissolution of the sample
- B :
-
adsorption constant, 1/mol
- C :
-
acid concentration, mol/1
- E a :
-
activation energy of dissolution, kJ/(mol K)
- F :
-
Faraday number, C/mol
- f :
-
shape factor
- [H+]:
-
hydrogen ion concentration in solution at a given pH, mol/1
- [H0 +]:
-
hydrogen ion concentration in solution at the point of zero charge, mol/1
- K 0 :
-
acid-base equilibrium constant
- n :
-
reaction order with respect to acid
- q :
-
fractal dimensionality of dissolving particles
- R 0 :
-
initial particle radius, mm
- R:
-
universal gas constant, J/(mol K)
- T :
-
temperature, K
- t :
-
time, min
- t 0.5 :
-
time of dissolution of half the sample, s
- V 0 :
-
initial volume of completely dissolved particles, cm3
- dV :
-
dissolved volume, cm3
- W :
-
specific dissolution rate, cm/min
- W 0 :
-
dissolution rate constant, cm/min
- z :
-
charge of the transferring ion
- β:
-
ion transfer coefficient
- γ:
-
correction for the deviation from the Nernst equation
- ϕ0 :
-
potential drop at the hydroxide/electrolyte interface
- θ:
-
[A1(OH)3]S coverage of the surface
- θ1 :
-
[〉ALOH2 +...AS -] coverage of the surface
References
Lainer, A.I., Erashin, N.N., Lainer, Yu.A., and Pevzner, R.Z.,Proizvodstvo glinozema (Manufacture of Alumina), Moscow: Metallurgiya, 1978.
Kazarinov, V.E.,Dvoinoi sloi i elektrodnaya kinetika (Electrical Double Layer and Electrode Kinetics), Moscow: Nauka, 1981.
Alford, W.J. and Stephens, D.L., Chemical Polishing and Etching Techniques for Al2O3 Single Crystals,J. Am. Ceram. Soc, 1963, vol. 46, p. 193.
Kiya, M.O. and Irtysheva, M.A., Decoration of Dislocations in Corundum Crystals,Kristallografiya, 1966, vol. 11, p. 656.
McVickers, R.C., Ford, S.D., and Dugdale, R.A., Polishing and Etching Techniques for Dense Alumina,J. Am. Ceram. Soc., 1962, vol. 45, p. 199.
Siesmayer, B., Heimann, R., Lacmann, R., and Franke, W., The Dissolution Form of Single Crystal Spheres. V. Dissolution of Al2O3,J. Cryst. Growth, 1975, vol. 28, p. 757.
Delmon, B.,Introduction à la cinétique hétérogène, Paris: Technip, 1969. Translated under the titleKinetika geterogennykh reaktsii, Moscow: Mir, 1972.
Zutic, V. and Stumm, W., Effect of Organic Acids and Fluoride on the Dissolution Kinetics of Hydrous Alumina: A Model Study Using the Rotating Disc Electrode,Geochim. Cosmochim. Acta, 1984, vol. 48, p. 1493.
Stumm, W., Wehrli, B., and Wieland, E., Surface Complexation and Its Impact on Geochemical Kinetics,Croat. Chim. Acta, 1987, vol. 60, no. 3, p. 429.
Filonov, A.V., Kharlanov, A.N., and Lunina, E.V., Acid-Base Properties of Alumina Modified with Orthoboric Acid,Zh. Fix, Khim., 1996, vol. 70, no. 6, p. 1027.
Paukshtis, E.A.,Infrakrasnaya spektroskopiya vgeterogennom kislotno-osnovnom katalize (Infrared Spectroscopy in Heterogeneous Acid-Base Catalysis), Novosibirsk: Nauka, 1992.
Wefer, K. and Misra, C.,Oxides and Hydroxides of Aluminum, New York: Wiley, 1987, p. 19.
Lippens, K.B. and Steggerda, J.J., Active Alumina,Physical and Chemical Aspects of Adsorbents and Catalysts, Linsen, B.G., Ed., London: Academic, 1970. Translated under the titleStroenie i svoistva adsorbentov i katalizatorov, Moscow: Mir, 1973.
Tikhonov, V.N.,Analiticheskaya khimiya elementov: Alyuminii (Analytical Chemistry of Elements: Aluminum), Moscow: Nauka, 1971, p. 87.
Gorichev, I.G., Kutepov, A.M., Gorichev, A.I.,et al, Kinetika i mekhanizmy rastvoreniya oksidov i gidroksidov zheleza v kislykh sredakh (Kinetics and Mechanisms of the Dissolution of Iron Oxides and Hydroxides in Acid Media), Moscow: Ros. Univ. Druzhby Narodov, 1999, p. 9.
Davis, J.A., James, R.O., and Leckie, J.O., Surface Ionization and Complexation at the Oxide/Water Interface,J. Colloid Interface Sci., 1978, vol. 63, no. 3, p. 480.
Sprycha, R.J., Electrical Double Layer at Alumina/Electrolyte Interface,J. Colloid Interface Sci., 1980, vol. 127, no. l,p. 1.
Westall, J. and Hohl, H., A Comparison of Electrostatic Models for the Oxide/Solution Interface,J. Colloid Interface Sci., 1980, vol. 65, no. 12, p. 265.
Batrakov, V.V., Gorichev, I.G., and Kipriyanov, N.A., Effect of the Electrical Double Layer on the Dissolution Kinetics of Metals,Elektrokhimiya, 1990, vol. 30, no. 4, p. 444.
Gorichev, I.G., Batrakov, V.V., Shaplygin, N.S.,et al., Complex Formation on the Surface of Iron Hydroxides,Neorg. Mater., 1994, vol. 30, no. 10, p. 1203.
Rozovskii, A.Ya.,Geterogennye khimicheskie reaktsii (Heterogeneous Chemical Reactions), Moscow: Nauka, 1980.
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Nevskaya, E.Y., Kuchkovskaya, O.V., Kutepov, A.M. et al. α- al(OH)3, dissolution in acid media. Theor Found Chem Eng 34, 292–297 (2000). https://doi.org/10.1007/BF02755978
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DOI: https://doi.org/10.1007/BF02755978