Process for preparing linear .alpha.-olefins

Details Process for preparing linear .alpha.-olefins Process for preparing linear .alpha.-olefins

C - Chemistry, Metallurgy

07

C

260/706.2

C07C 2/30 (2006.01) C07C 11/02 (2006.01)

Patent

CA 1310985

ABSTRACT OF THE DISCLOSURE A process for preparing a linear .alpha.-olefin having from 6 to 20 carbon atoms comprising polymerizing ethylene or an ethylene containing .alpha.-olefin in the presence of a catalyst consisting of a zirconium halide, an organoaluminum compound and a Lewis base in an inert solvent and terminating the polymerization by adding a catalyst deactivating agent to the resulting reaction mixture, wherein said catalyst contains a zirconium component comprising a zirconium halide represented by formula (I): ZrXaA4-a (I) wherein X and A may be the same or different and each represents chloride, bromide atom or iodide and a is 0 or an integer of 1-4; an aluminum component comprising an alkylaluminum compound represented by formula (II): AlR11.5 Q11.5 (II) wherein R1 represents an alkyl group of 1-20 carbon atoms, Q represents chloride, bromide or iodide atom and said formula (II) may also be represented by AL2R13Q13 and an alkylaluminum compound represented by formula (III): AlR2b Q23-b (III) wherein R2 and Q2 have the same meanings as R1 and Q1 above and b is an integer of 1-3; said catalyst being mixed at a molar ratio (Al/Zr) of said zirconium component and aluminum component of 3- and at a molar ratio (AlR11.5Q11.5/AlR2bQ23-b) of the components represented by formulae (II) and (III) of 2-10: and said catalyst further contains at least one Lewis base selected from the group consisting of thiophene, methyl disulfide, tiourea triphenylphosphine and trioctylphosphine. Use of the catalyst enables preparation of linear .alpha. -olefins of a high purity and reduction in the amount of by-produced wax.

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