Method for producing polyethylene
US9574018B2 · kind B2 · utility
0Cited by
9References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2011 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Mar 4, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2410/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a method for consecutively producing at least two different polyethylene resins in one slurry loop reactor, comprising producing a first polyethylene resin in the presence of a Ziegler-Natta and/or a Chromium catalyst, and consecutively producing a second polyethylene resin in the presence of a metallocene catalyst, characterized in that the ratio of the melt flow index of the first produced polyethylene resin to the melt flow index of the second produced polyethylene resin is at least 0.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.