Gas phase polymerization and distributor plate passivation treatment
US7875685B2 · kind B2 · utility
0Cited by
8References
33Claims
0Family size
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Key dates
| Filing date | Nov 7, 2007 |
| Grant date | Jan 25, 2011 |
| Priority date | — |
| Expiry date | Jan 21, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31692
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Apparatus and methods for gas phase polymerization are provided. The method can include polymerizing one or more olefins at gas phase conditions in a reactor comprising one or more process exposed surfaces in the presence of a catalyst system; and treating at least a portion of the one or more process exposed surfaces prior to injecting the catalyst system to reduce the number of surface hydroxyls or access of the catalyst system to the surface hydroxyls on the process exposed surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.