摘要: 57 ABSTRACT A method for effecting enhanced contact between two immiscible liquid of different electrical conductivities comprises applying both intense mechanical agitation (1) and, in an immediately adjacent Zone, a varying electrostatic field (2), in order to effect rapid change of their liquid-liquid interfaces but maintaining droplet size of a desirably high magnitude at least outside the zone of the intense agitation. The method may be applied to, for instance, liquid-liquid extraction. Apparatus is also described.