Werkwijze en inrichting voor het terugwinnen van niet met water mengbare oplosmiddelen

PROBLEM TO BE SOLVED: To economically and quantitatively recover a solvent by introducing a mixture of a water immiscible solvent having density lower than that of water with water from a position above a phase boundary and passing the same so as to alternately flow above and under a partition arranged in an upper phase. SOLUTION: A separation tank 1 has an outflow port 2 for water determining the lower limit of a phase boundary 3, an introducing port 4 provided at a position higher than the phase boundary 3, a partition 5 arranged so that a liquid flows above and under the partition 5 alternately and guiding liquid flow in the direction of the outflow port 2 and an outflow port 6 for the solvent determining the upper limit of the height 7 of a liquid. By this constitution, a solvent can be perfectly and continuously separated from a mixture of a water immiscible solvent having density lower than that of water with water in an extremely efficient manner.