Process for purification of polyether carbonate polyols
US9527958B2 · kind B2 · utility
1Cited by
14References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 2014 |
| Grant date | Dec 27, 2016 |
| Priority date | — |
| Expiry date | May 2, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/34
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a process for the production of a high purity polyether carbonate polyol. The high purity polyether carbonate polyols prepared by the process herein contain a low level of catalyst residues. The process adds diatomaceous earth to a polyether carbonate polyol to form a suspension, mixes the suspension for a specified time period at a specified temperature, and filters the suspension to form the high purity polyether carbonate polyol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.