The Asia FLLEX is the only commercially available, laboratory scale flow aqueous extraction system on the market, and can be used with a wide range of organic solvents that are either more or less dense than water. Its advanced membrane technology enables separation of the widest possible range of phase mixtures, including the separation of THF from an aqueous phase, and offers better control of bubble size, limiting the formation of emulsions which commonly occur using traditional liquid-liquid extractions.