Process for producing polyether polyols

摘要

The present invention relates to a process for the production of a polyether polyol by polyaddition of an alkylene oxide onto a starter compound containing active hydrogen atoms conducted in the presence of a double metal cyanide catalyst comprising conducting a reaction mixture at least once through a zone which has an energy density of at least 5x106 J/m3, wherein the dwell time of the reaction mixture in this zone is at least 10-6 seconds per pass.