Process for preparing polyolefins and use of antifouling agents therein
US9334346B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2015 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Jan 22, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2410/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process of preparing a polyolefin in a loop reactor in the presence of antifouling agent can include feeding into the loop reactor diluent, monomers, optionally hydrogen, and optionally one or more co-monomers to produce a liquid phase. Antifouling agent and catalyst can be introduced into the loop reactor. The process can include polymerizing the monomers and optional co-monomers to form the polyolefin. The process can be characterized in that a time difference between introduction of the antifouling agent and introduction of the catalyst is at most 3 hours. The process can be characterized in that the catalyst is introduced into a liquid phase when a concentration of the antifouling agent ranges from 0 ppm to less than 0.3 ppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.