Double metal cyanide complex catalysts modified with Group IIA compounds
US5952261A · kind A · utility
14Cited by
15References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1998 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Mar 20, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J27/26
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Highly active double metal cyanide complex catalysts useful for epoxide polymerization are prepared by reacting zinc chloride or other metal salt with potassium hexacyanocobaltate or other metal cyanide salt in the presence of a Group IIA compound such as calcium chloride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.