| Abstract: | The efficiency of a pulsed perforated plate extraction column can be improved, particularly at low values of A.f, by superimposing a rotary agitation. The hold up and the Peclet number have been measured in such a column in order to calculate the coefficient of backmixing of the continuous phase. A comparison of the results with those for a conventional pulsed column has indicated that the improved performance is due to an increase in hold up and not, as might have been supposed, to reduced backmixing. |
