| abstract |
A spray-dried composition comprising an inert porous filler and a reaction product of 1) a mixture or reaction product of a magnesium halide, a solvent, an electron donor compound, and a transition metal compound. The filler is substantially spherical and has an average particle size ranging from about 1 μm to about 12 μm. Methods of making spray-dried compositions, catalysts and polymerization processes employing such are also described. |