The transport of alcohol present in the feed takes place across
the membrane due to its ability to partition into the membrane
phase and its diffusion through the membrane. The concentration
gradient is considered to be the driving force. A thin liquid film,
which separates feed and internal aqueous phases, controls the
mass transfer between both phases. The extraction of alcohol from
aqueous feed solution using liquid emulsion membrane is dependent
on surfactant concentration, treatment ratio of emulsion to
feed, volume ratio of internal phase to membrane phase, stirring