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Process Technology for Solution Precipitation of Nanocrystalline Materials

07.02.2007
Particle size reduction currently receives rapidly growing attention from all industry sectors since it allows to derive interesting material properties from simple and proven chemical compositions. Wet precipitations are well-known and thus attractive synthetic reactions but classical reactor concepts are often unsuitable for nanoparticle precipitation because of slow reactant mixing. According to a novel precipitation technology, finely dispersed solid particles having sizes down to the nano-scale can now be industrially manufactured. Two reactants are separated in different compartments of a largely unpressurised membrane reactor while mass transport takes place by diffusion of one reactant through the membrane pores. The method is universally applicable and different kinds of industrial membrane modules can be used.

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