Process for preparing group vi metal-based olefin...

Details Process for preparing group vi metal-based olefin... Process for preparing group vi metal-based olefin...

C - Chemistry, Metallurgy

07

F

C07F 11/00 (2006.01) C07F 17/00 (2006.01) C08F 4/69 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2308160

A Group VIB metal-based, ligand-containing olefin polymerization catalyst component can be made by using Group VIB metal trihalide as the starting reagent for the Group VIB metal which process comprises contacting (e.g., in tetrahydrofuran) the Group VIB metal trihalide, such as chromium trichloride, with the ligand reagent or reagents, such as a cyclopentadienyl-containing lithium compound and a lower alkyl-containing lithium compound, in the presence of a sigma donor stabilizing ligand, such as pyridine.

Constituant de catalyseur de polymérisation d'oléfines contenant des ligands, à base de métal du groupe VIB, qui peut être préparé en utilisant du trihalogénure de métal du groupe VIB en tant que réactif de départ pour le métal du groupe VIB. Le procédé consiste à mettre en contact (par ex. dans du tétrahydrofuranne) le trihalogénure de métal du groupe VIB, tel que du trichlorure de chrome, avec le ou les réactif(s) des ligands, tels qu'un composé de lithium contenant du cyclopentadiényle et un composé de lithium contenant de l'alkyle inférieur, en présence d'un ligand de stabilisation donneur de sigma, tel que la pyridine.

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