Utilization of micromixers for extraction processes

The aim of the investigation was to evaluate the extraction performance of a mixer settler set-up for miniplant technology using static micromixers as an alternative to conventional stirring apparatuses. A comprehensive exper imental study was conducted at BASFAG to broaden the technology base for th e "extraction" unit operation which is well established for miniplants in o rder to be utilized for microplant systems. The work proved that micromixer s, or micromixer arrays, are highly efficient apparatuses for extraction pu rposes. The extraction efficiency was found to be a function of volume flow , which could be explained in light of the volume flow dependence of the me an droplet size and, hence, the specific surface area of the dispersions in termediately formed. At optimal flow conditions, one practical mixer settle r stage was found to yield one theoretical plate for most systems investiga ted.