Application of Air-Lifting Pump in Standard Spray-Sieve-Plates Pulsed Extraction Column

he present research aims to determine the application of air-lifting pump in 100 mm diameter standard spray-sieve-plates pulsed extraction column for 30%TRPO/kerosene solution-1 mol/L HNO3 solution. The liquid flow rate of air-lifting pump, designed for aqueous phase feeding, organic phase feeding and aqueous phase discharging, increases linearly with air flow rate within experimental range, and the submerged ratio of the air-lifting pump for aqueous phase discharging is linear with the holdup of the pulsed extraction column. By combining above results with the online measurement of air-purge method, the steady state of pulsed extraction column is easily controlled.