Process for preparing solid catalyst components for olefin polymerization

A process of preparing a solid catalyst component for olefin polymerization, the process comprising:

• dissolving a halide-containing magnesium compound in a mixture comprising an epoxy compound, an organic phosphorus compound, and a hydrocarbon solvent to form a homogenous solution;
• treating the homogenous solution with a first titanium compound in the presence of a supportive electron donor to form a solid precipitate;
• treating the solid precipitate with a second titanium compound, optionally in the presence of a non-phthalate electron donor, to form the solid catalyst component;
• wherein:
• the process is free of carboxylic acids and anhydrides;
• the first titanium compound and the second titanium compound are independently represented by:
• Ti(OR)gX4-g;
• each R is independently a C1-C4 alkyl;
• X is Br, Cl, or I;
• g is 0, 1, 2, or 3;
• the supportive donor comprises an ether, a succinate, a monoaryl ester, a polycarboxylic acid ester, a polyhydroxy ester, a heterocyclic polycarboxylic acid ester, a polyhydroxy ester, a heterocyclic polycarboxylic acid ester, an acrylate, an inorganic acid ester, an alicyclic polycarboxylic acid ester, or a hydroxy-substituted carboxylic acid ester compound having 2 to 30 carbon atoms;
• and
• the catalyst component comprises particles having a granular, or a substantially spherical or a spherical shape and exhibiting a D50 from about 3 μm to about 150 μm.