Process for the preparation of odour-lean polyether polyols

摘要

Process for the preparation of odour-lean polyether polyols from a polyether polyol starting product which is obtained by reacting a starting compound having a plurality of active hydrogen atoms with one or more alkylene oxides, which process comprises the steps of: (a) contacting the neutralised or unneutralised polyether polyol product with an excess of an acid having a pKa of less than 5 under hydrolysis conditions, (b) contacting the reaction mixture with water under hydrolysis conditions, and (c) recovering the odour-lean polyether polyol.