Process for improving the polymerization of ethylene and one or more optional comonomer(s) in a polymerization loop reactor
US8367783B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 2007 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Aug 27, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for improving the polymerization of ethylene and one or more optional co-monomer(s) in a polymerization loop reactor characterized in that said process comprises the step of controlling the hydrogen/monomer ratio along the path of the reactor by multiple, spatially separated, feeding of hydrogen along the path of the loop reactor. In particular, the invention provides a process for controlling, and preferably narrowing, the molecular weight distribution of the produced polymer particles. In another aspect, the invention relates to a polymerization loop reactor suitable for the polymerization process of ethylene and an optional olefin co-monomer, wherein the molecular weight distribution of the produced ethylene polymer can be controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.