| 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 600x10<SUP>-3 </SUP>m<SUP>3 </SUP>of inert gas per kg of polyol and at a residence time of the polyol of from 0.5 to 120 minutes.
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