High activity Ziegler-Natta catalysts, process for producing catalysts and use thereof

US10358513B2 · kind B2 · utility

Assignee

• Lummus Novolen Technology GmbH · DE

Inventors

• Douglas D. Klendworth · Marietta, US
• Kenneth W. Johnson · Sharonville, US
• Andreas Winter · Königstein, DE
• Franz Langhauser · Bad Dürkheim, DE

Key dates

• Filing date: Jun 10, 2009
• Grant date: Jul 23, 2019
• Expiry date: Sep 17, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F110/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Improved Ziegler-Natta catalysts and methods of making the improved catalyst are described. The Ziegler-Natta catalyst is formed using a spherical MgCl2-xROH support, where R is a linear, cyclic or branched hydrocarbon unit with 1-10 carbon atoms and where ROH is an alcohol or a mixture of at least two different alcohols and where x has a range of about 1.5 to 6.0, preferably about 2.5 to 4, more preferably about 2.9 to 3.4, and even more preferably 2.95 to 3.35. The Ziegler-Natta catalyst includes a Group 4-8 transition metal and an internal donor. The catalyst has improved activity in olefin polymerization reactions as well as good stereoregularity and hydrogen sensitivity.