The disclosed invention relates to a process for making an emulsion. The
process comprises: flowing a first liquid through a process microchannel
having a wall with an apertured section; flowing a second liquid through
the apertured section into the process microchannel in contact with the
first liquid, the second liquid being immiscible with the first liquid,
the first liquid forming a continuous phase, and the second liquid
forming a discontinuous phase dispersed in the first liquid.