Studies on the behavior of a sieve-plate extraction column with trapezoidal pulse

Abstract

The trapezoidal pulsed column of 50-min diameter is operated in dispersion-coalescence mode. Repeated coalescence and redispersion of two phases enhances the rate of surface renewal, and obvious coalesing layers during the pulse stop are conductive to overcome the backmixing. The drop size is fairly well-distributed throughout the cartridges. Its flooding velocities achieve about 1.8 cm/s, and only half of the pulse intensity is required as compared with sinusoidal pulsed column. Extraction efficiency of the trapezoidal pulsed column increases more than 30% than that of the sinusoidal one.