Catalyst For Ethylene Polymerization, Preparation Thereof, And Method For Controlling The Polymerization Kinetic Behavior Of Said Catalyst

摘要

The present invention relates to a catalyst for polymerization of ethylene, a process for preparing the same, and a method for controlling kinetic behavior of said catalyst in ethylene polymerization. Said catalyst contains a titanium-containing main catalyst component and a co-catalyst. The titanium-containing main catalyst component is prepared by reacting the following components: (1) a hydrocarbon solution of dialkylmagnesium compound of formula RMgR'.yEt₃Al; (2) an alcohol compound of formula R¹OH; (3) a silica support thermally activated at 200-800° C.; (4) an alkylaluminum compound of formula R²_nAlCl_3-n; (5) a linear halogenated alkane of formula R³X; and (6) a titanium compound of formula Ti(OR⁴)_mCl_4-m. The co-catalyst is an organoaluminum compound. Three different types of ethylene polymerization kinetic curves can be obtained by adjusting the temperature for thermally activating the silica support and the ratio of titanium to magnesium in the titanium-containing main catalyst component.