Patent ID: 6995109

Claim:
A process for preparing a bimetallic catalyst, the process comprising: (a) providing a supported non-metallocene catalyst by: (i) dehydrating a particulate support material at a temperature of greater than 600° C.; (ii) preparing a slurry of the dehydrated support in a non-polar hydrocarbon; (iii) contacting the slurry of (ii) with an organomagnesium compound RMgR′, where R and R′ are the same or different C 2 –C 12 alkyl groups; (iv) contacting the slurry of (iii) with a non-metallocene compound of a Group 4 or Group 5 transition metal, wherein the non-metallocene transition metal compound is used in an amount to provide from 0.3 to 1.5 moles of the Group 4 or 5 transition metal per mole of magnesium provided by the organomagnesium compound; and (v) drying the product of (iv) to obtain a supported non-metallocene catalyst; (b) contacting a slurry of the supported non-metallocene catalyst in a non-polar hydrocarbon with a solution of a metallocene compound and a C 1 –C 8 alkyl alumoxane in an aromatic solvent; and (c) drying the product of (b) to obtain a supported bimetallic catalyst.