Patent ID: 6486089
Filing Date: 2002-11-26
Classification: B01J,C08F,Y10S

Abstract:
A process for uniformly dispersing a transition-metal metallocene complex on a carrier material, the process comprising:(i) providing silica which is porous and has a particle size of 1 to 250 &mgr;m, having pores which have an average diameter of 50 to 500 Ã¥ and having a pore volume of 0.5 to 5.0 cm3/g; (ii) slurrying the silica in an aliphatic solvent having a boiling point lower than 110Â° C.; (iii) providing a volume of solution comprising a metallocene compound and alumoxane in an aromatic solvent, wherein the volume of said solution is less than that required to form a slurry of said silica, and wherein the concentration of alumoxane, expressed as Al weight percent, is 5 to 20; (iv) contacting the silica slurry of (ii) with the solution of (iii) and allowing the solution to impregnate the pores of silica and to disperse the metallocene compound in and on the carrier; and (v) evaporating the solvents from the contacted and impregnated silica slurry (iv) and recovering dry free-flowing particles.