Process of producing α-olefin polymers
AssigneeBorealis Technology Oy
InventorsPauli Leskinen, Kauno Alastalo
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Abstract
The present invention relates to a process for polymerizing α-olefins in at least two stages, the first stage comprising at least one bulk reactor and optionally at least one gas phase reactor for forming the α-olefin polymer matrix and the second stage comprising at least one additional gas phase reactor for copolymerization of ethylene with said polymer matrix. In the second stage an antifouling composition is fed into said gas phase reactor(s) for preventing fouling in the second stage.
Claims20
A process for polymerizing α-olefins capable of polymerization by an insertion mechanism using a Ziegler-Natta catalysts system in at least two stages, wherein
- (i) a first stage, where polymerization of an α-olefin to form a polymer matrix is carried out in at least one bulk reactor, and
- (ii) a second stage, where copolymerization of ethylene and α-olefin(s) in the presence of said polymer matrix from the first stage is carried out in at least one gas phase reactor,
- and wherein an antifouling composition comprising a mixture of an antistatic agent and a catalyst killer agent is fed into said gas phase reactor(s) of the second stage, but not into said reactor(s) of the first stage.
Dependencies are inferred from the claim text.