The invention relates to a process for preparing polyether alcohols by
catalytic addition of alkylene oxides onto a starter substance mixture
comprising water-soluble H-functional starter substances which are solid
at room temperature, alcohols which are liquid at the reaction
temperature and water using alkali metal hydroxides and/or alkaline earth
metal hydroxides as catalysts, wherein the amount of water is from 1.0 to
6.0% by weight, based on the weight of the starter substance mixture, and
the starter substance mixture comprises no amine constituents.