Method for preparing non-metallocene catalysts

US8153544B2 · kind B2 · utility

Assignee

• Equistar Chemicals, LP · US

Inventors

• Sandor Nagy · Naperville, US
• Linda N. Winslow · Cincinnati, US
• Shahram Mihan · Bad Soden, DE
• Reynald Chevalier · Paris, FR
• Lenka Lukesova · Hofheim, DE
• Ilya Nifant'ev · Moscow, RU
• Pavel V. Ivchenko · Moscow, RU
• Karen L. Neal-Hawkins · Cincinnati, US

Key dates

• Filing date: Jul 22, 2009
• Grant date: Apr 10, 2012
• Expiry date: Apr 28, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F10/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method of preparing supported catalysts useful for olefin polymerization is described. The catalysts comprise a Group 4 metal complex that incorporates a tridentate dianionic ligand. An activator mixture is first made from a boron compound having Lewis acidity and an excess of an alumoxane. The activator mixture is then combined with a support and the Group 4 metal complex to give a supported catalyst. The method provides an active, supported catalyst capable of making high-molecular-weight polyolefins.