Bayer Aktiengesellschaft

Herbert Echterhof

Pramod Gupta

Hartmut Hetzel

Roland Nast

Ulrich Brocker

A process for removing alkali material from a polyether polyol. From 1-20 wt. % water and 0-30 wt. % inert organic solvent are added to an alkaline polyether polyol. The resultant emulsion is maintained at a temperature of at least 70.degree. C. for a period of at least 30 minutes with little or no stirring to effect separation of the emulsion into an organic and an aqueous phase. The aqueous phase is then separated from the organic phase and the organic phase is treated by known methods to remove residual alkali material.

Growing community of inventors

Erkelenz, Germany

Herbert Echterhof