Process for the preparation of alkoxylates having a narrow distribution of homologs using antimony pentahalide complexes as the catalyst
AssigneeHoechst Aktiengese Ilschaft
InventorsIgnaz Wimmer, Rainer Kupfer
Life of this patent
Estimating the term…
Abstract
In the process described for the preparation of alkoxylates having a narrow distribution of homologs by reaction of compounds containing at least one hydroxyl group with alkylene oxide, complex compounds of antimony pentahalide with a special Lewis base are used as the catalysts. Alkoxylates having a narrow distribution of homologs and good color quality are obtained at a high conversion.
Claims7
A process for the preparation of alkoxylates having a distribution of homologs by reaction of compounds containing at least one hydroxyl group with alkylene oxide in the presence of an antimony pentahalide complex as the catalyst, which comprises using a complex of antimony pentahalide with a Lewis base having a DS value of 24 to 36 cm.sup.-1, in which the DS value of the Lewis base is defined as the difference in value between the symmetrical stretching frequency of the HgBr.sub.2 molecule in the gas phase and in the Lewis base.
Dependencies are inferred from the claim text.