Process for the production of polyolefins

Details Process for the production of polyolefins Process for the production of polyolefins

C - Chemistry, Metallurgy

08

F

C08F 4/646 (2006.01) C08F 4/02 (2006.01) C08F 10/00 (2006.01) C08F 32/00 (2006.01) C08F 36/00 (2006.01) C08F 4/619 (2006.01) C08F 4/6192 (2006.01)

Patent

CA 2186698

A process for the production of polyolefins which comprises polymerizing or copolymerizing olefins in the presence of a catalyst composition which at least comprises: a catalyst component (I) resulting from mutual contact of sub-components (A) and (B), said sub-component (A) being of the formula R1pMe1X14-p and/or R12Me1X1' wherein Me1 is a transition metal of the IVa Group in the Periodic Table, R1 is either of cyclopentadienyl, substituted cyclopentadienyl, indenyl, substituted indenyl, fluorenyl and substituted fluorenyl groups which may be bonded through a C2-C18 hydrocarbon group and/or a silylene group, X1 is a halogen atom, a hydrogen atom or a C1-C24 hydrocarbon group, p is an interger of 1 p 4, and X1' is a C1-C20 alkylidene group, and said sub-component (B) being a modified organoaluminum compound having Al-O-Al bonds; and a catalyst component (II) selected from the group of sub-components (C) and (E), said sub-component (C) being a transition metal elemental compound belonging to the IV-VIII Groups in the Periodic Table and selected specifically from the group consisting of oxides, halides, carbonates, acetates, alkoxides, acetylacetonates, metallocenes, hydrogen complexes, alkyl complexes, phosphine complexes, cyano complexes, pyridyl complexes and carbonyl complexes of said transition metal elemental compound, or a compound resulting from mutual contact of said transition metal elemental compound and a compound (D) of the formula Me'R'm(OR")nX'z-m-n wherein R' and R" each are a C1-C24 hydrocarbon group, X' is a halogen or hydrogen atom, Me' is an element of the I-III Groups in the Periodic Table, z is a valence of Me', m and n are 0<mz and 0nz, respectively and 0<m+nz; and said sub-component (E) being a transition metal of the IV-VIII Groups in the Periodic Table. Either of the catalyst components (I) and (II) is contacted, during or after the preparation thereof, with an inorganic compound carrier and/or a particulate polymer carrier. The disclosed catalysts find application particularly in the production of polyolefins having enhanced molecular weights and a relatively wide molecular weight distribution and olefin copolymers having a relatively narrow composition distribution at increased rate of yield.

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