| abstract |
Catalysts which can have high activity in the oligomerization of ethylene and processes for producing an .alpha.-olefin which comprise using the catalysts to conduct ethylene oligomerization. One of the catalysts for producing an .alpha.-olefin through ethylene oligomerization is obtained by contacting (a) a clay, clay mineral, or lamellar ion-exchanging compound with (b-1) a complex of a transition metal in Groups 4 to 6 of the Periodic Table; and one of the processes comprises using this catalyst to conduct ethylene oligomerization. The other catalyst is obtained by contacting (a) a clay, clay mineral, or lamellar ion-exchanging compound with (b-2) a complex of a transition metal in Groups 8 to 10 of the Periodic Table; and the other process comprises using this catalyst to conduct ethylene oligomerization. |