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Effect of temperature on the rates of dissolution of gibbsite and boehmite
Author(s) -
Scotford R. F.,
Glastonbury J. R.
Publication year - 1971
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450490510
Subject(s) - gibbsite , boehmite , activation energy , dissolution , arrhenius equation , chemistry , atmospheric temperature range , rate equation , materials science , inorganic chemistry , mineralogy , thermodynamics , kinetics , metallurgy , aluminium , kaolinite , physics , quantum mechanics
The effect of temperature on the rate of dissolution of gibbsite and boehmite in caustic soda solutions was studied in the temperature range 25‐100°C. The results fitted the Arrhenius rate equation and the activation energy was found to be 30.6 ± 0.9 k. cal/g‐mole for the gibbsite reaction and 29.4 ± 1.3 k. cal/g‐mole for the boehmite reaction. While the effect of temperature on the boehmite dissolution has not been reported before, the value of the activation energy for gibbsite was higher than previously reported values. Reasons for these differences are given and a consistent value of the activation energy was obtained which agreed both with experimental data for different gibbsite samples and with modified forms of the previously published data.