Patent ID: 7056995

Claim:
A process for the selective trimerization of olefinic compounds under trimerization conditions in the presence of a catalyst system, said process comprising the steps of: A) providing a catalyst system comprising: a) a cyclopentadienyl titanium complex of formula (Cp-B(R) n Ar)TiR 1 3 wherein Cp is a cyclopentadienyl type ligand, or cyclopentadienyl type ligand being substituted, B is a bridging group, based on a single atom selected from the groups 13 to 16 inclusive of the Periodic System, Ar is an aromatic group, or a substituted aromatic group, R is, independently, hydrogen, a hydrocarbon residue, a hydrocarbon being substituted, or a hydrocarbon containing heteroatams, or groups R and B are joined together to form a ring, n is an integer equal to the valency of B minus 2, and R 1 is a mono-anionic group, and b) an activator; B) providing olefinic compounds, wherein said olefinic compounds are selected from the group consisting of C 2 –C 20 olefins and mixtures of two or more of these olefins; and C) trimerizing said olefinic compounds in the presence of said catalyst system, wherein said process is effected at a pressure from 0.2 to 14 MPa.