Patent ID: 8728970

Claim:
A solid catalyst component comprising the product of a process comprising: (a) reacting a magnesium alcoholate compound of formula Mg(OR 1 )(OR 2 ), wherein R 1 and R 2 are identical or different and are each an alkyl radical having 1 to 10 carbon atoms, with titanium tetrachloride carried out in a hydrocarbon at a temperature of 50-100° C., wherein wherein the reaction of the magnesium alcoholate with TiCl 4 is carried out at a molar ratio of Ti/Mg in the range of 1.5 to 4, (b) subjecting the reaction mixture obtained in (a) to a heat treatment at a temperature of 100° C. to 200° C. for a time ranging from 3 to 25 hours, and (c) isolating and washing with a hydrocarbon the solid obtained in (b), wherein said solid catalyst component has a Cl/Ti molar ratio from 3.5 to 5, wherein said solid catalyst component has a particle size between 5 and 30 μm; and wherein said catalyst component has the following molar ratio: Mg:Ti:—Cl=1:0.8-1.5:3.2-4.2.