Borealis Ag

Tom Elovirta

Timo Leinonen

Peter Denifl

Sameer Vijay

Lauri Huhtanen

Pertti Elo

Mikko Lylykangas

Ismo Lehtiniemi

Michael Bartke

Kimmo Hakala

Pasi Matikainen

Soile Rautio

Jeannette Aumo

Jeanette Aumo

Jukka Räsänen

The present invention is directed to a process for producing a solid olefin polymerization catalyst component from an emulsion wherein the particle size of the solid catalyst or the droplet size of the emulsion is controlled. The actual size of the droplets or the solid catalyst particles is measured, or alternatively, both are measured. Then a difference between the actual size and the set point is calculated and the process is controlled based on the difference.

Method for producing an olefin polymerization catalyst

The present application provides a process for polymerizing at least one olefin in the presence of a polymerization catalyst, including: (A) continuously introducing a first liquid with a transition metal compound, an organometallic compound, and a solvent and a second liquid into an emulsification stage, (B) continuously withdrawing the emulsion and directing it into a solidification stage to form a slurry with a solid polymerization catalyst component, (C) continuously recovering the solid polymerization catalyst component, (D) directing the solid polymerization catalyst component into a first prepolymerization stage with a monomer and a second liquid to form a slurry, (E) recovering a prepolymerized solid polymerization catalyst component, (F) continuously introducing the prepolymerized solid polymerization catalyst component into a second prepolymerization stage with an olefin monomer to form a prepolymerized catalyst, and (G) continuously withdrawing the prepolymerized catalyst and directing it into a subsequent polymerization stage with at least one olefin monomer.

Process for olefin polymerization

Growing community of inventors

Porvoo, Finland

Tom Elovirta