Process for the polymerization of propylene
US9718902B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2013 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | Dec 17, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1397
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a process for the preparation of polypropylene having: a molecular weight of 450,000-950,000, a molecular weight distribution of 3-6, and xylene soluble content of 2-6 wt %, by converting propylene into the polypropylene without pre-polymerization in the presence of a polymerization catalyst under a condition where the volume ratio of H2 to propylene is at most 0.0020, wherein the catalyst comprises a catalyst component and a co-catalyst, wherein the catalyst component is obtained by a process wherein a compound with formula Mg(OAlk)xCly wherein x is larger than 0 and smaller than 2, y equals 2−x and each Alk, independently, represents an alkyl group, is contacted with a titanium tetraalkoxide and/or an alcohol in the presence of an inert dispersant to give an intermediate reaction product and wherein the intermediate reaction product is contacted with titanium tetrachloride in the presence of an internal donor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.