Process and apparatus for reducing take-off valve plugging in a polymerization process
US7015289B2 · kind B2 · utility
23Cited by
14References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2003 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | Dec 12, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A slurry polymerization process removes a portion of the fluid slurry without using a settling leg or a continuous take-off. The process uses a reactor take-off valve that is periodically fully closed and fully opened such that the withdrawn slurry is removed from the reactor in a discontinuous manner. The regular, periodic full closing and full opening of the take-off valve reduces instances of polymer plugging the take-off valve. In another aspect of the invention, a take-off valve is throttled in a repetitive pattern to reduce plugging of the take-off valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.