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US 2025/0360495 A1Published application
Process for preparing double metal cyanide catalysts
AssigneeCovestro Deutschland AG
InventorsJoerg Hofmann, Maria Gleixner, Thomas Asma, Philipp Sander
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Abstract
The present invention relates to an improved process for preparing double metal cyanide (DMC) catalysts for the preparation of polyoxyalkylene polyols, preferably polyether polyols and/or polyether carbonate polyols. The invention further provides DMC catalysts which are obtainable by this process and for the use of the catalysts according to the invention for preparing polyoxyalkylene polyols.
Claims20
A process for preparing a double metal cyanide catalyst (DMC) comprising:
- i) reacting an aqueous solution of a cyanide-free metal salt, an aqueous solution of a metal cyanide salt, an organic complex ligand and a complex-forming component, wherein the complex-forming component contains one or more compounds (1) of formula (I):
- where
- R1 is a substituted or unsubstituted aryl group,
- R2 is an alkylene group, and
- n has a value of ≥1.
2 more elements
Dependencies are inferred from the claim text.