The present invention relates to a process for preparing a solid catalyst component suitable for producing polyethylene and its copolymers, said process comprising the steps of: (a) contacting a dehydrated support having hydroxyl groups with a magnesium compound having the general formula MgR1R2; (b) contacting the product obtained in step (a) with modifying compounds (A) and/or (B) and/or (C), wherein: (A) is at least one oxygen and/or nitrogen comprising organic compound; (B) is a compound having the general formula R11f(R12O)gSiXh, (C) is a compound having the general formula (R13O)4M, and (c) contacting the product obtained in step (b) with a titanium halide compound having the general formula TiX4, wherein Ti is a titanium atom and X is a halide atom, wherein an organometallic compound is added after step (a) and before step (b). The invention also relates to a solid catalyst component obtainable by said process. The invention further relates to a process for producing polyethylene and its copolymers in the presence of the solid catalyst component and a cocatalyst.
本发明涉及一种制备适用于生产聚
乙烯及其共聚物的固体催化剂组分的工艺,所述工艺包括以下步骤:(a) 将具有羟基的脱
水载体与通式为 MgR1R2 的
镁化合物接触; (b) 将步骤(a)中得到的产物与改性化合物(A)和/或(B)和/或(C)接触,其中:(A)为至少一种含氧和/或氮的有机化合物;(B)为通式为 R11f(R12O)gSiXh 的化合物,(C)为通式为(R13O)4M 的化合物,以及(c)将步骤(b)中得到的产物与通式为 TiX4 的卤化
钛化合物接触,其中 Ti 为
钛原子,X 为卤原子,在步骤(a)之后和步骤(b)之前加入有机
金属化合物。本发明还涉及一种可通过上述工艺获得的固体催化剂组分。本发明还涉及一种在固体催化剂组分和助催化剂存在下生产聚
乙烯及其共聚物的工艺。