| abstract |
The present invention relates to a solid catalyst comprising titanium, magnesium, a halogen compound, a silane-based compound, and a diketone-based internal electron doner; and a preparation method of polypropylene using the same. According to the present invention, the solid catalyst for polymerizing propylene with high efficiency can prepare polypropylene having excellent stereoregularity with high yield without using a diester compound of aromatic dicarboxylic acid. |