DISULFONIC ACID ESTER COMPOUND AND APPLICATION THEREOF, OLEFIN POLYMERIZATION CATALYST COMPONENT AND OLEFIN POLYMERIZATION CATALYST

摘要

Disclosed are a disulfonic acid ester compound of general formula I, olefin polymerization catalyst component prepared by using the disulfonic acid ester compound, a composite support of magnesium halide and silicon dioxide, a conventional internal electron donor compound and a titanium halide compound as raw materials of a reaction, such that two internal electron donor compounds are used, thus ensuring both the activity of a catalyst and the tacticity of a polymer prepared thereby. Also disclosed are an olefin polymerization catalyst comprising the component and application thereof.