Purification of propylene polymerization product
US4167619A · kind A · utility
2Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1978 |
| Grant date | Sep 11, 1979 |
| Priority date | — |
| Expiry date | Apr 21, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention is directed to an improved method for the work-up of the reaction product from stereospecific polymerization of propylene with Ziegler Type catalysts in a liquid phase polymerization process employing a C.sub.3 reaction medium. The product work-up comprises treatment of the reactor effluent slurry with a small amount of a C.sub.3 or C.sub.4 alkanol and with oxygen or an effective peroxide, followed by washing of the polymer with a C.sub.3 hydrocarbon medium containing a small amount of a C.sub.3 or C.sub.4 alkanol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.