Schematic diagram of the annular centrifugal extractor (ACE) [6] stationary cylinder, rotating cylinder, (3A) light-phase inlet, (3B) heavy-phase inlet, (4A and B) Region below rotating cylinder, central opening for rotating cylinder, radial baffles on the stationary bottom plate, deflecting baffle in the rotor, vertical baffles in the rotor, interface between air and light phase, (10A and B) overflow weirs for lighter and heavier phase, respectively, clean width for heavy phase, clean width for light phase, (13A and B) Outlets for light and heavy phases, respectively, liquid level in the annulus.