A solid titanium complex catalyst for polymerization and copolymerization of ethylene is prepared by the process comprising: (1) preparing a magnesium solution by reacting a halogenated magnesium compound with an alcohol; (2) reacting the magnesium solution with an ester compound having at least one hydroxyl group and a silicon compound having an alkoxy group to produce a magnesium composition; and (3) producing a solid titanium catalyst through recrystallization by reacting the magnesium composition solution with a mixture of a titanium compound and a haloalkane compound; and optionally reacting the solid titanium catalyst with an additional titanium compound. The solid titanium complex catalyst for polymerization and copolymerization of ethylene according to present invention exhibits high catalytic activity, high hydrogen reactivity and controlled particle size, and can advantageously used in the polymerization and copolymerization of ethylene to produce polymers of high bulk density.
一种用于
乙烯聚合和共聚的固体
钛络合物催化剂的制备过程包括(1) 将卤代
镁化合物与醇反应制备
镁溶液;(2) 将
镁溶液与具有至少一个羟基的酯化合物和具有一个烷氧基的
硅化合物反应制备
镁组合物;(3) 将
镁组合物溶液与
钛化合物和卤代烃化合物的混合物反应,通过重结晶制备固体
钛催化剂;还可选择将固体
钛催化剂与另外一种
钛化合物反应。根据本发明,用于
乙烯聚合和共聚的固体
钛复合催化剂具有高催化活性、高氢反应活性和可控粒径,可用于
乙烯的聚合和共聚以生产高体积密度的聚合物。