Invention Grant
- Patent Title: Method and apparatus for polymerising olefins in gas phase
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Application No.: US15569954Application Date: 2016-06-10
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Publication No.: US10450391B2Publication Date: 2019-10-22
- Inventor: Vasileios Kanellopoulos , Klaus Nyfors , Pablo Ivan Aguayo Arellano , Gunter Weickert , Eric-Jan Prinsen
- Applicant: Borealis AG
- Applicant Address: AT Vienna
- Assignee: Borealis AG
- Current Assignee: Borealis AG
- Current Assignee Address: AT Vienna
- Agency: Fay Sharpe LLP
- Priority: EP15171820 20150612
- International Application: PCT/EP2016/063342 WO 20160610
- International Announcement: WO2016/198631 WO 20161215
- Main IPC: C08F2/00
- IPC: C08F2/00 ; C08F10/02 ; C08F2/01 ; C08F2/34 ; B01J8/18 ; B01J8/00

Abstract:
The present invention deals with an olefin polymerisation process. At least one olefin is polymerised in gas phase in a fluidised bed in the presence of an olefin polymerisation catalyst in a polymerisation reactor having a vertical body; a generally conical downwards tapering bottom zone; a generally cylindrical middle zone above and connected to said bottom zone; and a generally conical upwards tapering top zone above and connected to said middle zone. Fluidisation gas is introduced to the bottom zone of the reactor from where it passes upwards through the reactor, and withdrawn from the top zone of the reactor. The gas is then compressed, cooled and returned into the bottom zone of the reactor. A fluidised bed is thus formed within the reactor where the growing polymer particles are suspended in the upwards rising gas stream wherein the superficial velocity of the fluidisation gas is less than the transport velocity of the particles. There is no fluidisation grid in the reactor. The fluidisation gas is passed from an inlet chamber into the bottom zone and the gas flows from the upper part of the inlet chamber to the lower part thereof and the gas flows from the lower part of the inlet chamber to the bottom zone.
Public/Granted literature
- US20180155465A1 METHOD AND APPARATUS FOR POLYMERISING OLEFINS IN GAS PHASE Public/Granted day:2018-06-07
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