Method for the purification of metallocenes

US6900343B1 · kind B1 · utility

Assignee

• Basell Polyolefine GmbH · DE

Inventors

• Carsten Bingel · Frankfurt am Main, DE
• Patrik Müller · Gothenburg, SE
• Hans-Herbert Brintzinger · Frauenfeld, CH
• Hans-Robert-Hellmuth Damrau · Konstanz, DE

Key dates

• Filing date: Nov 18, 1999
• Grant date: May 31, 2005
• Expiry date: Nov 18, 2019

Classification

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

Abstract

A process for purifying metallocenes in which a sparingly soluble metallocene halide is converted into a readily soluble and readily crystallizable metallocene by replacement of at least one halide ligand by an alternative negatively charged ligand and the metallocene obtained in this way is subsequently purified by crystallization.