After finishing his PhD in 1991 professor de Haan worked in various positions at DSM. From 1999-2006 he held the chair separation technology at the University of Twente and from 2006-2010 the chair in Process Systems Engineering at the Technical University of Eindhoven. In 2010 he joined Corbion-Purac as corporate scientist process technology in combination with a part-time position at the Technical University of Eindhoven till 2013. In 2016 professor de Haan decided to join Cosun Food and Technology Centre as principal technologist, which he combines with a part-time position as professor in process technology at Delft University of Technology where he was appointed in 2014.
Since 2002 professor de Haan is editor for the Elsevier journal Separation and Purification Technology. Furthermore he is member of the European Federation of Chemical Engineers Working Party Fluid Separations and has been co-founder and scientific director of the Institute for Sustainable Process Technology.
Professor de Haan authored >350 papers and contributed to >50 patent applications. He has written the textbooks “Industrial Separation Processes” and “Process Technology”, which are both published by De Gruyter GmbH.
In Delft professor de Haan’s main responsibility is the conceptual product and process design education program. His current research activities focus on technologies for the intensification of biobased chemicals production.