Operational Mechanism of Pulsed Flow in a Packed Extration Column

Abstract

Performance data are given for a packed extraction-pulse column on the systems of ethylether-uranyl nitrate-water and benzene-acetic acid-water. Considering the relationship between the capacity factor and holdup of the column, the results obtained are summarized as follows:1) Proportion of the free holdup to the total holdup is represented by the following equation, Apparent contact area is calculated from the above Xf value and dispersed drop size. The contact area increases with the increase in intensity of pulsed condition, until it attains a saturated value. The saturated point is in the vicinity of amXf=25-30 [m/hr].2) The effect of pulsation on the over-all mass transfer coefficient is much smaller than that on the cotact area.3) The effect of column height on the over-all capacity factor depends mainly on the abnormally large valae of the over-all mass transfer coefficient of the fresh surface at the bottom of the column.