Polyethylene catalyst and a process for preparing the same
US7354981B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 3, 2004 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Dec 3, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention discloses a polyethylene catalyst and a process for preparing the same, said catalyst being composed of a main component of catalyst and a cocatalyst, wherein the main component of catalyst is prepared by reacting: (1) a magnesium-alcohol complex, (2) an alkyl aluminum compound having a formula R3nAlCl3-n supported on silica, and (3) a titanium compound having a formula Ti(OR2)mCl4-m, and the cocatalyst is an organic aluminum compound. The catalyst of the present invention has advantages including high polymerization activity, less difference between the polymerization activities at low hydrogen level condition and at high hydrogen level condition, stable polymerization reaction, good particle morphology of catalyst, and less fine powder of polymer product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.