Process for gas phase polymerization of olefins in a fluidized bed reactor
US4882400A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1988 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Jul 27, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/901
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process for gas phase polymerization of olefins using a highly active catalyst in a fluidized bed reactor (1), comprising a recator body (2) partially occupied by the fluidized bed and surmounted by a disengagement chamber (3). The gas mixture withdrawn from the disengagement chamber (3) is fed to a dust separator (6) e.g. a clycone, to separate the fine particles entrained by the gas. The gas is cooled, compressed and recycled to the base of the reactor. The particles are withdrawn from the dust separator (6) by a mixing device (8) which mixes the particles with a carrier gas. The carrier gas and particles are recycled to the reactor where they are introduced into the reactor body (2) through an opening in the side wall thereof at a position above the fluidized bed, but below the disengagement chamber (3). The velocity of the particles introduced into the reactor is insufficient to cause them to be blown directly into the bed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.