Chromium-containing complex polymerisation catalyst

Details Chromium-containing complex polymerisation catalyst Chromium-containing complex polymerisation catalyst

C - Chemistry, Metallurgy

08

F

252/104, 402/556

C08F 4/22 (2006.01) C08F 10/00 (2006.01) C08F 10/02 (2006.01)

Patent

CA 2024463

Case7344(2) ABSTRACT OF THE DISCLOSURE CHROMIUM-CONTAINING COMPLEX POLYMERISATION CATALYST The present invention relates to an olefin polymerization obtainable by depositing on a dry inorganic oxide support at least one mononuclear chromium complex, which is representable by the general formula: Image wherein: - the cyclopentadienyl ligand is substituted with 4 or 5 hydrocarbyl groups (R1-R5) containing 1 to 3 carbon atoms, and - L is one or more hydrocarbyl ligands which are sufficiently reactive to enable the complex to react with the inorganic oxide without thermal activation. The catalyst can be used without thermal activation for polymerizing olefins, particularly ethylene optionally with C3-8 alpha-olefins. It produces polyolefins having broad molecular weight distribution.

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