CATALYTIC SYSTEMS FOR OLIGOMERIZATION OF ETHYLENE INTO LINEAR ALPHA-OLEFINS Russian patent published in 2008 - IPC B01J31/18 C08F4/70 C07C2/32 B01J31/14 B01J31/26 C07F15/02 C07F15/06 

FIELD: polymerization catalysts.

SUBSTANCE: invention relates to catalytic systems for oligomerization of ethylene into linear α-olefins with high yield and very high selectivity as well as to preparation of these linear α-olefins. Catalytic system contains: (a) one or several catalysts based on iron or cobalt bis(arylimino)pyridine, said bis(arylimino)pyridine complexes containing ligands of general formula I: ; (b) first cocatalyst selected from aluminum alkyls, alumoxanes, and mixtures thereof; (c) second cocatalyst containing one or several compounds described by general formula ZnR'₂, wherein R', identical or different, are selected from hydrogen, optionally substituted C₁-C₂₀-hydrocarbon, phenyl, Cl, Br, SR", NR"₂, OH, OR", CN, wherein R", identical or different in the same molecule, are C₁-C₂₀-hydrocarbyls. α-olefins are obtained by reaction of ethylene under oligomerization conditions in presence of effective amount of above-defined catalytic system.

EFFECT: augmented assortment of polymerization catalysts.

20 cl, 1 tbl