Process for preparing solid titanium catalyst component,...

C - Chemistry – Metallurgy – 08 – F

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C08F 4/64 (2006.01) C08F 4/654 (2006.01) C08F 10/00 (2006.01) C08F 110/06 (2006.01)

Patent

CA 2202099

Disclosed is a process for preparing a solid titanium catalyst component, comprising contacting (a) a liquid magnesium compound, (b) a liquid titanium compound, (c) an electron donor and (d) a solid divalent metallic halide. In this process, the solid divalent metallic halide is preferably one having a crystalline structure of cadmium chloride type. The contact of the component (a) with the component (b) is preferably carried out in the presence of the solid divalent metallic halide (d). According to this process, there can be obtained a solid titanium catalyst component capable of polymerizing olefins with an extremely high activity and capable of producing polyolefins of high stereoregularity when .alpha.-olefins of 3 or more carbon atoms are polymerized.

On présente un procédé pour la préparation d'un élément solide de catalyseur au titane, selon lequel on met en contact a) un composé liquide de magnésium, b) un composé liquide de titane, c) un donneur d'électrons et d) une halogénure solide de métal bivalent. Selon ce procédé, l'halogénure solide de métal bivalent est, de préférence, un composé à structure cristalline de type chlorure de cadmium. Le contact du composant a) avec le composant b) est effectué de préférence en présence de l'halogénure solide de métal bivalent d). Selon ce procédé, on peut obtenir un élément de catalyseur au titane d'une activité extrêmement élevée pour la polymérisation d'oléfines et pouvant produire des polyoléfines à forte stéréorégularité lorsque des alpha-oléfines à 3 atomes de carbones ou plus sont polymérisées.

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