Patent ID: 8609737
Filing Date: 2013-12-17
Classification: B01F

Abstract:
1. A process for preparing an emulsion comprising the steps of: injecting a first liquid as a dispersed phase liquid through a central inlet microchannel of a microchannel system with a cross junction geometry chip, injecting a second liquid as a continuous phase liquid through an outer cross inlet microchannel, which continuous phase liquid does not instantly mix with said injected first liquid prior to the cross junction, and obtaining the emulsion in an exit microchannel, wherein the flow rate Q where A is the area of the exit microchannel in square meters, γ the interfacial tension between the first liquid and the second liquid in Newtons per meter and μ d the viscosity of the dispersed phase in Pascal-seconds, characterized in that f is in the range from 0.04 to 0.25, and in that the ratio of the dispersed phase flow rate Q d to the continuous phase flow rate Q c is wherein Oh c and Oh d are respectively the Ohnesorge numbers of the continuous phase and of the dispersed phase, being wherein μ is the viscosity in Pascal-seconds, ρ is the density in kilograms per cubic meter, γ is the interfacial tension between the first liquid and the second liquid in Newtons per meter and R is the half-width of the exit microchannel in meters.