A process for the preparation of polyether polyol low odor

摘要

Process of preparing odour-lean polyether polyol from crude polyether polyol prepared with the help of double metal cyanide complex catalyst which process comprises stripping the crude polyether polyol in a vessel at a temperature of from 50 to 200 °C, at a ratio of total amount of stripping gas introduced into the vessel to total amount of polyol introduced into the vessel of from 20 to 600 x 10-3 m3 of inert gas per kg of polyol and at a residence time of the polyol of from 0.5 to 120 minutes.