Method of oligomerization of ethylene in the alpha - olefins linear using a catalytic composition of organometallic complexes of the unit 4 grafts on anions

摘要

The present invention describes a process for oligomerization of ethylene in the alpha - linear olefins using a catalytic composition comprising: - at least one organometallic compound of the unit 4, supported on anions by means of at least one covalent bond metal - oxygen - at least one lewis base, the molar ratio between the lewis base aprotic and the organometallic compound being between 0,5 / 1 and 20 / 1 - at least an activating agent, - at least one ionic liquid of formula q ′ has