Process for producing high molecular weight polyethylene

US8722819B2 · kind B2 · utility

Assignee

• Ticona LLC · US

Inventors

• Dominique Robert · Montegrosso d'Asti, IT
• Julia Hufen · Rheinberg, DE
• Kerstin Lüdtke · Markkleeberg, DE
• Jens Ehlers · Horst, DE
• Gary M. Diamond · Menlo Park, US
• Margarete Lecrec · Mountain View, US
• Guang Zhu · Union City, US

Key dates

• Filing date: Jul 1, 2011
• Grant date: May 13, 2014
• Expiry date: Jul 1, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F110/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a process for producing polyethylene having a molecular weight of at least 3×105 g/mol as determined by ASTM 4020, ethylene is contacted under polymerization conditions with a slurry of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand, wherein the slurry further includes a scavenger comprising an alkyl magnesium compound.