An industrial production-scale process currently conducted at Clariant site/Frankfurt, termed Phenyl Boronic Acid Process from here on, was investigated at laboratory-scale using two micromixer/tubular reactor configurations, being equipped with either a glass interdigital (for details see (1) Ehrfeld, W.; Golbig, K.; Hessel, V.; Löwe, H.; Richter, T. Characterization of mixing in micromixers by a test reaction: single mixing units and mixer arrays. Ind. Eng. ...