Patent ID: 7964763

Claim:
A process for producing an oligomeric product containing octene by the tetramerisation of an olefinic compound in the form of ethylene comprising contacting ethylene with a tetramerisation catalyst in an aliphatic liquid medium at a reaction temperature of at least 50° C., wherein the catalyst comprises the combination of i) a source of a transition metal; and ii) a ligating compound of the formula (R 1 ) m X 1 (Y)X 2 (R 2 ) n wherein: X 1 and X 2 are independently selected from the group consisting of N, P, As, Sb, Bi, O, S and Se; Y is a linking group between X 1 and X 2 ; m and n are independently 0, 1 or a larger integer; and R 1 and R 2 are independently hydrogen, a hydrocarbyl group or a heterohydrocarbyl group, and R 1 is the same or different when m>1, and R 2 is the same or different when n>1 and wherein the product produced includes more than 30% by mass of octene.