Patent ID: 7638586

Claim:
A process which comprises polymerizing ethylene in a slurry reaction in the presence of a catalyst system which comprises an activator and an indenoindolyl transition metal complex on a support, wherein the activator is selected from the group consisting of alumoxanes, organoboranes, ionic borates, and combinations thereof, and the catalyst system is slurried with an inert solvent prior to addition and added as a slurry to the reactor to produce polyethylene having a bulk density at least 15% greater than that of polyethylene made under the same conditions but without slurrying the catalyst system with an inert solvent wherein the indenoindolyl transition metal complex has a structure selected from the group consisting of: wherein M is a Group 3 to 10 transition metal; each L is independently selected from the group consisting of halide, alkoxy, aryloxy, siloxy, alkylamino, and C 1 -C 30 hydrocarbyl; L′ is selected from the group consisting of alkylamido, substituted or unsubstituted cyclopentadienyl, indenyl, boraaryl, pyrrolyl, azaborolinyl and indenoindolyl; x satisfies the valence of M; R 1 is selected from the group consisting of C 1 -C 30 hydrocarbyl, dialkylboryl and trialkylsilyl; each R 2 is independently selected from the group consisting of C 1 -C 30 hydrocarbyl, H, F, Cl, and Br; G is a divalent radical selected from the group consisting of hydrocarbyl and heteroatom-containing alkylene radicals, diorganosilyl radicals, diorgano-germanium radicals, organoboranyl radicals, organophoshinyl radicals, and diorganotin radicals.