Process for emulsion using microchannel technology

The disclosed invention relates to a process for treating or making an emulsion in a microchannel. Microchannel repeating unit (200) comprises process microchannel (210) apertured section (240) and liquid channel (270). Process microchannel (210) has opposite sidewalls (212) and (214). Apertured section (240) is in sidewall (212). The apertured section (240) may be referred to as a porous sectionor porous substrate. The apertured section (240) may comprise a sheet or plate (242) having a plurality of apertures (244) extending through it. The liquid channel (270) opens to process microchannel(210) through apertured section (240). The liquid channel (270) is a flow-through channel with an outlet indicated at arrow (275). The process microchannel (210) has mixing zone (216), and may have non-apertured regions (not shown in the drawings) upstream and/or downstream from mixing zone (216). The mixing zone (216) is adjacent to the apertured section (240). In one embodiment, the mixing zone(216) may have a restricted