The dissolution kinetics of gibbsite in sodium hydroxide at ambient pressure

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Henrik Grénman, Tapio Salmi, Dmitry Yu. Murzin, Jonas Addai-Mensah
Publisher: American Chemical Society
Publication year: 2010
Journal: Industrial & Engineering Chemistry Research
Journal acronym: Ind. Eng. Chem. Res.
Volume number: 49
Issue number: 6
Start page: 2600
End page: 2607
Number of pages: 8
ISSN: 0888-5885
eISSN: 1520-5045


The dissolution kinetics of pure gibbsite in concentrated sodium hydroxide solutions was studied. The experiments were performed under ambient pressure and at 60-85 degrees C. The changes in morphology of the solid phase were studied during the reaction by particle size, porosity, and surface area measurements as well as scanning electron microscopy. Reaction rates were observed to be strongly dependent on temperature and hydroxide concentration. Several kinetic models, based on different representation of the surface area of gibbsite, were compared to the experimental data and a good correlation between a model incorporating rough/porous geometry and the experimental data was obtained.

Last updated on 2020-30-09 at 03:47