Process for olefin polymerization

US8501881B2 · kind B2 · utility

Assignee

• Borealis AG · AT

Inventors

• Jeannette Aumo · Porvoo, FI
• Pasi Matikainen · Porvoo, FI
• Michael Bartke · Bodenwerder, DE
• Tom Elovirta · Porvoo, FI
• Sameer Vijay · Linz, AT
• Mikko Lylykangas · Vantaa, FI
• Pertti Elo · Ayacucho, PE
• Lauri Huhtanen · Loviisa, FI

Key dates

• Filing date: Nov 11, 2010
• Grant date: Aug 6, 2013
• Expiry date: Nov 11, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2410/01
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

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.