Chromium-containing bimetallic complex catalysts

Details Chromium-containing bimetallic complex catalysts Chromium-containing bimetallic complex catalysts

C - Chemistry, Metallurgy

08

F

252/52, 402/631

C08F 10/00 (2006.01) C08F 4/78 (2006.01)

Patent

CA 1317275

Case 6375/6628/6629 cog(2) ABSTRACT OF THE DISCLOSURE CHROMIUM CONTAINING BIMETALLIC COMPLEX CATALYSTS An olefin polymerisation catalyst obtainable by depositing on a dry inorganic oxide a bimetallic chromium-containing organometallic complex representable by the general formula; Image in which the R groups are C1 to C6 hydrocarbyl groups; H is hydrogen; a and b are individually O or an integer from 1 to 5, the sum of a + b being equal to 5; M is Ti, Zr, Hf, V, Cr, Fe, Nb, Mn, Ni, or Co; L and L' are ligands which are C1 to C12 hydrocarbyl or carbonyl ligands; x is an integer from 1 to 3 depending on the available co-ordination sites on the chromium atom; y is an integer from 1 to 5 depending on the available co-ordination sites on the metal M and A is a metal-metal bond, an ionic bond or at least one carbonyl bridging group. Embodiments include binuclear chromium complexes and complex salts. Also disclosed is a process for polymerising olefins using the catalysts.

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