A batch pilot-scale apparatus is described for the study of processes for obtaining phyto-extracts using solvents. The distinctive feature of the equipment is that it provides the efficiency of a multi-stage counter-current extraction, yet uses only a single batch extractor (as opposed to a battery of extractors). This is achieved by using an auxiliary tank in which intermediate extracts are saved and recirculated in a pre-established order. Careful design of the mechanisms for the circulation of liquid from such tanks has resulted in an apparatus that is compact and has simple, flexible operation. A prototype of this apparatus was constructed for the study of the direct extraction of oil from sunflower seeds using hexane. A simple model that describes the operation of the equipment is presented and applied to our experimental work with oilseeds.