PROCESS FOR THE PREPARATION OF AN IMPROVED DOUBLE METAL CYANIDE COMPLEX CATALYST, DOUBLE METAL CYANIDE CATALYST AND USE OF SUCH CATALYST

摘要

Process for the preparation of a double metal cyanide (DMC) catalyst comprising a) preparation of a DMC catalyst; b) dispersing the catalyst of step a) in a dispersion agent, yielding a catalyst dispersion; c) allowing sedimentation of part of the catalyst from the catalyst dispersion obtained in step b), yielding a sedimentated catalyst and a dispersed catalyst; d) separating the dispersed catalyst from the sedimentated catalyst.