Browsing by Author "Mistincik, E"

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Leaching kinetics of ulexite in oxalic acid
    Abali, Y; Bayca, SU; Mistincik, E
    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.
  • No Thumbnail Available
    Item
    Kinetics of oxalic acid leaching of tincal
    Abali, Y; Bayca, SU; Mistincik, E
    The leaching kinetics of tincal in oxalic acid solutions was investigated in this study. The effects of parameters reaction temperature, acid concentration, solid to liquid ratio, particle size and stirring speed on tincal leaching were determined in the experiments. It is observed that the leaching rate increases with increasing reaction temperature, stirring speed and decreasing solid to liquid ratio and particle size. The experimental data tested the reaction control models and the best model for the leaching rates of tincal was the product layer model. The activation energy of the process was calculated as 35.14 kJ mol(-1). (c) 2006 Elsevier B.V. All rights reserved.