Patent ID: 7332455

Claim:
A process of preparing a catalyst component for olefin polymerization, the process comprising the steps of: (1) dissolving a magnesium halide in a solvent system comprising an organic epoxy compound and an organo phosphorus compound, to form a homogenous solution; and (2) contacting and reacting said solution with at least one titanium compound of the general formula Ti(OR 3 ) 4-m X m , in which R 3 is a C 1 -C 14 aliphatic hydrocarbyl group, X is selected from the group consisting of F, Cl, Br and mixture thereof, and m is an integer of from 1 to 4, in the presence of an inorganic oxide, to precipitate a solid titanium-containing catalyst component; with at least one inner electron-donor compound being introduced in any of said steps, wherein the inner electron-donor compound is selected from the group consisting of: (i) aliphatic or aromatic polybasic carboxylic acid ester compounds; (ii) polyol ester compounds of the general formula (I), wherein R 1 , to R 6 and R 1 to R 2n , which may be identical or different, are hydrogen, halogen, optionally substituted linear or branched C 1 -C 20 alkyl, C 3 -C 20 cycloalkyl, C 6 -C 20 mono-ring or multi-ring aryl, C 7 -C 20 alkylaryl, C 7 -C 20 arylalkyl, C 2 -C 10 alkenyl, or C 2 -C 10 ester group, with the proviso that R 1 and R 2 are not hydrogen, R 3 to R 6 and R 1 to R 2n optionally comprise one or more heteroatoms, selected from the group consisting of nitrogen, oxygen, sulfur, silicon, phosphorus and halogen, replacing carbon or hydrogen or both, and one or more of R 3 to R 6 and R 1 to R 2n may be linked to form a ring; and n is an integer ranging from 0 to 10; and (iii) 1,3-diether compounds of the general formula (IV), wherein R I , R II , R III , R IV , R V and R VI , which may be identical or different, are selected from the group consisting of hydrogen, halogen, linear or branched C 1 -C 20 alkyl, C 3 -C 20 cycloalkyl, C 6 -C 20 aryl, C 7 -C 20 alkylaryl and C 7 -C 20 arylalkyl, and R VII and R VIII , which may be identical or different, are selected from the group consisting of linear or branched C 1 -C 20 alkyl, C 3 -C 20 cycloalkyl, C 6 -C 20 aryl, C 7 -C 20 alkylaryl and C 7 -C 20 arylalkyl; and groups R I to R VI may link each other to form a ring.