The hydraulic characteristics of the 30% TRPO (trialkylphosphine oxide)/kerosene―1.0 M HNO₃ and 0.025 M iPr-C [4]C-6 (25,27-bis(isopropoxy) calix [4]-26,28-crown-6)/n-octanol―1.3 M HNO₃ systems were systematically investigated in a φ20 ACE (annular centrifugal extractor) to find the cause of the hydraulic performance problem of the CECE (calixcrown ether extraction) process operated in ACEs. The results show that the operating and structure parameters have different influences on the F (A/O) (phase ratio (A/O)) and V (liquid hold-up volume). Moreover, the V_r (V of the rotor) of the 30%TRPO/kerosene―HNO₃ and iPr-C [4]C-6/n-octanol―HNO₃ systems are almost same, while the V_m (V of the mixing zone) and V_t (total V of the ACE) for the former are slightly higher than those for the latter under the same experimental conditions. Meanwhile, both the F_m (A/O) (F (A/O) of the mixing zone) and F_s(A/O) (F (A/O) of the separating zone) for the 30%TRPO/kerosene―HNO₃ system are also higher than those for the iPr-C [4]C-6/n-octanol―HNO₃ system under the same experimental conditions. Moreover, the F_s(A/O) of the iPr-C [4]C-6/n-octanol―HNO₃ system is less than 1.5 under most of the present experimental conditions, which shows organic phase entrainment may easily occur in the outlet aqueous phase. This may be the cause of the hydraulic performance problem of the CECE process operated in ACEs.

30％TRPO（三烷基氧化膦）/煤油的水力特性-1.0 M HNO ₃和0.025 M iPr-C [4] C-6（25,27-双（异丙氧基）杯[4] -26,28-冠在φ20ACE （环形离心萃取器）中对-6）/正辛醇-1.3 M HNO ₃系统进行了系统研究，以找出在ACE中运行CECE（杯形冠醚萃取）过程的水力性能问题的原因。结果表明，操作和结构参数对F（A / O）（相比（A / O））和V（液体滞留量）的影响不同。此外，30％TRPO /煤油-HNO ₃的V _r（转子的V）和的iPr-C [4] C-6 / Ñ辛醇-HNO _3个系统几乎相同，而V_米（V的混合区的）和V_吨（总V前者的ACE的）是略高于后者在相同的实验条件下。同时，对于30％TRPO /煤油，F _m（A / O）（混合区的F（A / O））和F _s（A / O）（分离区的F（A / O）） ―HNO ₃系统也高于iPr-C [4] C-6 /正辛醇―HNO ₃系统在相同的实验条件下。此外，在目前的大多数实验条件下，iPr-C [4] C-6 / n-辛醇-HNO ₃系统的F _s（A / O）均小于1.5，这表明有机相夹带很容易在出口水相。这可能是在ACE中运行CECE过程的液压性能问题的原因。