Ethylene gas phase polymerisation process
US10577435B2 · kind B2 · utility
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27References
13Claims
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Key dates
| Filing date | Jul 27, 2016 |
| Grant date | Mar 3, 2020 |
| Priority date | — |
| Expiry date | Oct 8, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2500/07
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a gas phase polymerisation process for the production of ethylene polymers in the presence of a catalyst composition based on a chromium compound, a titanium compound and a silica support material. The silica support material has a surface area (SA) between 685 m2/g and 800 m2/g, a pore volume (PV) between 1.65 and 1.85 cm3/g and an average particle size in the range between 25 and 35 micrometres. The catalyst composition is injected by a dry catalyst feeder into the polymerization reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.