Gas phase polymerisation of ethylene
US10745495B2 · kind B2 · utility
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Key dates
| Filing date | Jan 19, 2017 |
| Grant date | Aug 18, 2020 |
| Priority date | — |
| Expiry date | Jun 26, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2500/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a process for the production of polyethylene by gas phase polymerisation of ethylene in the presence of a supported chromium oxide based catalyst which is modified with an amino alcohol wherein the molar ratio of amino alcohol:chromium ranges between 0.5:1 and 1.5:1 wherein the support is silica having a surface area (SA) between 250 m2/g and 400 m2/g and a pore volume (PV) between 1.1 cm3/g and less than 2.0 cm3/g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.