Patent ID: 8076523
Filing Date: 2011-12-13
Classification: B01J,C07C,C08F,C10G,Y02P

Abstract:
1. An oligomerisation process comprising contacting at least one olefinic compound in the form of an olefin or a compound including an olefinic moiety with at least two different catalysts, including a tetramerisation catalyst and a further oligomerisation catalyst to produce an oligomeric product, which includes a mixture of at least one tetramer olefin and at least one other oligomer, wherein the tetramerisation catalyst comprises a combination of i) a source of a transition metal which transition metal is Cr; and ii) a ligating compound of the formula wherein: X and wherein the further oligomerisation catalyst is a catalyst comprising the combination of iii) a source of transition metal; and iv) a ligating compound of the formula wherein: A and C are independently selected from the group consisting of N, P, As, Sb, Bi, O, S and Se; B is a linking group between A and C; m′ and n′ are independently 0, 1 or larger integer; R′ and R″ are independently hydrogen, a hydrocarbyl group or a heterohydrocarbyl group; and R′ is the same or different when n′>1, and R″ is the same or different when m′>1and wherein the oligomeric product of the process contains from 9.5 wt % to 52.8 wt % of the tetramer olefin.