Process for the preparation of polyether polyols
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United States of America Patent
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Aug 17, 2004
Grant Date -
Nov 14, 2002
app pub date -
Feb 19, 2002
filing date -
Feb 22, 2001
priority date (Note) -
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Abstract
The present invention relates to a process for the production of polyether polyols by polyaddition of alkylene oxides onto starter compounds containing active hydrogen atoms conducted in the presence of a double-metal cyanide catalyst wherein a reaction mixture is guided at least once through a zone which has an energy density of at least 10.sup.5 J/m.sup.3 and wherein the residence time of the reaction mixture in this zone is at least 10.sup.-6 seconds per pass.
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