| abstract |
The invention relates to a method for separating a double metal cyanide catalyst (DMC catalyst) from polyol, comprising the steps of: A) providing in a reactor: a polyol containing the DMC catalyst; an alcohol; and optionally a filtering aid, the mixture being heated, B) filtering the mixture from step A), C) optionally separating the alcohol from the filtrate of step B), characterized in that in step A) 4 wt.% to 12 wt.% ethanol, in reference to 100 wt.% polyol, is used as the alcohol, without a chelating agent. |