Abstract: STUDY ON THE PERFORMANCE OF THE HYDRAULIC AND MASSTRANSFER WITH MINIATURE CENTRIFUGAL CONTACTORWang Jiangchen Tang Wencheng Fan Shilei Lian Jun(Institute of Nuclear Energy Technology,Tsinghua University,P.O.Box1021,Beijing 102201)ABSTRACTThe hydraulic performance and the masstransfer properties of HNO3、Fe3＋、Nd3＋are studied in H2O30%TRPOkerosene system at different conditions with singlestage φ=10 mm miniature centrifugal contactor.The rotor′s speed varies from 4000 r/min to 4500 r/min.The total throughput is less than 600 mL/h.The phase ratio(o/a) changes from 1/10 to 10/1.Under the above experimental conditions,the single contactor operats very well and gives good performance.The stage efficiencies of HNO3 and Nd3＋ are about 90%.The Fe3＋ extraction is very slow kinetically and the stage efficiency of Fe3＋ is low.Key words Miniature centrifugal contactor Fe3＋ Nd3＋ Hydraulic masstransfer Extraction kinetics