To solve the paradox between the flux and droplet size in conventional membrane emulsification, a process including it two-stage ceramic membrane emulsification tinder jet flow was proposed. An apparatus integrating slurry reactor and membrane emulsification was used in this investigation. In the first stage, a ZrO2 ceramic membrane, with a nominal pore size of 0.16 mu m, was used. The flux of the membrane was 150 L m(-2) h(-1) at a pressure of 0.35 MPa and a temperature of 20 degrees C, and the droplet size of the emulsion was 54.69 mu m. To obtain monodispersed emulsions with a small droplet size, a second ceramic membrane jet-flow emulsification was used. An alpha-Al2O3 ceramic membrane with a nominal pore size of 1.5 gm was selected as the emulsification medium. The flux was attained at 454 L m(-2) h(-1) at a pressure of 0.2 MPa, and the monodispersed emulsion with droplet size (D-50) of 2.29 mu m could be obtained. The effects of pressure, stirring speed, and emulsifier concentration on the second stage of the process were discussed in detail. (c) 2005 American Institute of Chemical Engineers.