| abstract |
The present invention provides a process for preparing a solid catalyst component comprising: a) a solid catalyst component comprising at least one internal electron donor having magnesium, titanium, halogen and a lone pair of electrons; b) an aluminum alkyl compound; And c) an external electron donor comprising a first external electron donor C1 which is a malonate compound. In the present application, a catalyst composition containing an external electron donor comprising a malonate compound is used in olefin polymerization, especially propene polymerization, which significantly improves the catalytic activity and hydrogen responsiveness of the catalyst and extends the molecular weight distribution of the polymer So that the development of various polymers can be facilitated. |