Leaching kinetics of ulexite in oxalic acid
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Celal Bayar University, Department of Chemistry
Celal Bayar University, Soma Technical Vocational School
Publication date: 2011-06-01
Corresponding author
Salih U. Bayca   

Celal Bayar University, Soma Technical Vocational School, 45500 Soma, Manisa, Turkey
Physicochem. Probl. Miner. Process. 2011;47(1):139-148
Leaching of ulexite in oxalic acid, which is an organic acid, was studied. The parameters were solid-to-liquid ratio, acid concentration, stirring speed and temperature. The experimental data were applied to the homogeneous and heterogeneous kinetic models to determine the best one. The results showed that the leaching rate increases with increasing reaction temperature, stirring speed, acid concentration, but decreases with solid-to-liquid ratio and particle size. The leaching kinetics of ulexite was determined as the product layer model. The activation energy of the process was calculated.
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