Synthesis of titanocenes

Details Synthesis of titanocenes Synthesis of titanocenes

C - Chemistry, Metallurgy

07

F

C07F 17/00 (2006.01) B01J 31/22 (2006.01)

Patent

CA 2243661

A method for the preparation of titanium-containing metallocene compounds, including constrained geometry titanium complexes, useful as olefin polymerization catalysts is disclosed. Pursuant to the invention, titanium tetrachloride is converted to titanium trichloride by reaction with a metal compound in a non-interfering solvent to produce a mixture useful directly for reaction with a deprotonated metallocene ligand. The titanocene compounds produced pursuant to the invention are free of trace amounts of aluminum which can adversely affect the polymerization reaction.

L'invention concerne un procédé qui permet de préparer des composés métallocènes contenant du titane, notamment des complexes de titane à géométrie contrainte, utiles comme catalyseurs de polymérisation des oléfines. Selon l'invention, on convertit le tétrachlorure de titane en trichlorure de titane par réaction avec un composé métallique dans un solvant neutre, de façon à produire un mélange qui peut être directement utilisé pour la réaction avec un ligand métallocène déprotoné. Les composés titanocènes produits selon l'invention sont dépourvus de traces d'aluminium risquant de perturber la réaction de polymérisation.

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