Variations of the concentration of the continuous phase in the pulsed plate column were measured in the experiments on the extraction of acetic acid from methylisobutyl ketone by means of water.
In this column, the longitudinal mixing was very intensive. The variation of the concentration was approximated on the assumption that the backmixing diffusivity was constant throughout the column.
Capacity coefficient eliminated from the effect of the longitudinal mixing and the backmixing diffusivity were calculated in the present work.
It was concluded that the decrease of extraction efficiency in the lower range of operating condition was caused by the longitudinal mixing.