External Numbering-up and Flow Distribution

Most of the above-mentioned methods are used inside a reactor for distribution to individual channels. One of a few examples in which distribution between several devices is reported is described in the following [140,141,148-150], This application is also a good example of the processing of fouling-sensitive reactions in micro devices. A process for the production of powder with a narrow particle size distribution had to be up-scaled. The devices developed for this purpose were two different types of micro mixers. 

The separation layer mixer used a barrier liquid to delay the mixing until the exit of the mixer is reached by the fluid. Here the actual mixing is processed outside the reactor inside the developing bubble (for more detailed information, see Section 1.3.13, Droplet Separation-Layer Mixing). 

The second type of mixer uses two impinging jets exiting from two borings to contact the reactants (for more detailed information, see Section 1.3.33, Jet Collision Turbulent or Swirling-flow Mixing). 

Both devices allow mixing without clogging the micro structures. 

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