Use of hydrogen scavenging catalysts to control polymer molecular weight and hydrogen levels in a polymerization reactor

US8207280B2 · kind B2 · utility

Assignee

• Chevron Phillips Chemical Company LP · US

Inventors

• Rex E. Murray · Cross Lanes, US
• William B. Beaulieu · Tulsa, US
• Qing Yang · Bartlesville, US
• Errun Ding · Bartlesville, US
• Gary L. Glass · Canton, US
• Alan L. Solenberger · Bartlesville, US
• Steven J. Secora · Bartlesville, US

Key dates

• Filing date: Jun 28, 2010
• Grant date: Jun 26, 2012
• Expiry date: Sep 22, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/943
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention provides dual catalyst systems containing a metallocene catalyst and a hydrogen scavenging catalyst, and polymerization processes employing these dual catalyst systems. Due to a reduction in hydrogen levels in the polymerization processes, olefin polymers produced from these polymerization processes may have a higher molecular weight, a lower melt index, and higher levels of unsaturation.