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| Issue 1291-2 |
| US 6,852,664 B2 |
| Double metal cyanide catalysts for the preparation of polyether polyols |
| Pieter Ooms, Krefeld (Germany); Jörg Hofmann, Krefeld (Germany); and Martin Döbler, Düsseldorf (Germany) |
| Assigned to Bayer Aktiengesellschaft, Leverkusen (Germany) |
| Filed on Jul. 23, 2003, as Appl. No. 10/626,265. |
| Claims priority of application No. 102 35 130 (DE), filed on Aug. 01, 2002. |
| Prior Publication US 2004/0092389 A1, May 13, 2004 |
| Int. Cl.7B01J027//26 |
| U.S. Cl. 502—175 [502/156; 502/159; 502/161; 502/162; 502/167; 502/168; 502/170; 502/171; 502/172; 502/155] | 12 Claims |
| 1. A double metal cyanide (DMC) catalyst comprising
at least one double metal cyanide compound;
at least one organic complexing ligand lacking fluorine atoms; and
at least one fluorine-containing complexing ligand.
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