Ethylene oligomerization catalyzed by MCl2(PPh3)(2) Complexes/Ethylaluminoxane

The catalytic properties of MCl2 (PPh3)(2) (M = Fe, A; Co, B; Nx, C) in com bination with ethylaluminoxane (EAO) as cocatalyst for ethylene oligomeriza tion have been investigated. Treatment of the MCl2 (PPh3)(2) COmPICXeS With EAO in toluene generated active catalysts in situ that we capable of oligo merizating ethylene to low carbon olefins. The catalytic activity and produ ct distribution were affected by reaction condition, such as reaction tempe rature, the ratios of Al/M and the reaction time. The activity of 1.70 x 10 (5) g oligomers/(mol Co (.) h) for the catalytic system of CoCl2 (Pph(3))(2 ) with EAO at 200 degreesC was observed, with the selectivity of 91.1% to C 4-10 olefins and 70.7% to C4-10 linear alpha -olefins.