Low gel chromium catalysis

US7745551B2 · kind B2 · utility

Assignee

• Total Petrochemicals Research Feluy · BE

Inventors

• Philippe Bodart · Clermont-sous-Huy, BE
• Philippe Marechal · Grez-Doiceau, BE
• Eric Damme · Arquennes, BE

Key dates

• Filing date: Feb 8, 2005
• Grant date: Jun 29, 2010
• Expiry date: Mar 1, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F210/16
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention discloses the use of a chromium-based catalyst system in two serially connected loop reactors for copolymerising ethylene and a comonomer, at reduced productivity, the final polyethylene having a reduced amount of gel.