The aim of solids technology is the production of disperse solid products. Disperse substances require to have specific characteristics in terms of production and application. The handling and production of solid substances is a mayor task in chemical industry because a vast majority of products are solid substances or at least pass through a disperse state in the course of their production.

The application of microstructured devices offers new opportunities for the production of solid chemicals. Microstructured devices usually contain structures below 1000µm. Their main advantage is their high surface to volume ratio which leeds to a large specific surface area. In terms of solids technology microstructured devices can be used to obtain specific application-related product properties. Especially the design of the regular structures offer possibilities for influencing the particle size distribution. However, the handling of solid substances in microstructured devices is always challenging.

In the current paper the Starlaminator (designed by Institut für Mikrotechnik Mainz) has been used to produce well-defined particles in the submicron area. The Starlaminator is based on the micromixing concept of flow multilamination. The solid products produced in the micro mixer were compared to those obtained from conventional stirred batch reactors. Special attention was also given to the influence of surface-active agents on the precipitation. Product properties and process conditions were measured to characterize the precipitation process. For example particle size analysis was performed using laser diffractometry. A concept for an industrial production has been done in a second development step. Viscosity effects has been studied as well as effects of extreme phase ratios like 1:10. The project ends with a setup for a production scale reactor with a throughput of 4 tons per hour.