A process for the production of a titanium trichloride catalytic component wherein the titanium trichloride catalytic component is separated ftom a solvent comprising dissolved therein a titanium tetrachloride, an organic ether compound and an organo-aluminium compound, characterised in that the solvent is a mixed solvent comprising from 20 to 70%, by volume, of an aromatic hydrocarbon halide and a saturated aliphatic hydrocarbon and/or an alicyclic hydrocarbon in the presence of an olefin, the organo-aluminium compound. titanium tetrachloride and the organic ether compound being added to the mixed solvent at a solvent temperature of not more than 55°C, prior to heating the solvent to from 45 to 150'C over a period of from 10 minutes to 24 hours, which heating may be interrupted, and during the heating stage further organic ether compound and/or titanium tetrachloride being added so as to obtain a catalytic component having a uniform particle diameter of from 10 to 500µ is disclosed.
The thus-obtained titanium trichloride catalytic compound may be used together with an organo-aluminium compound as a catalyst system in the homo-orcopolymeriza- tion of a-olefins.
The invention aims at an improvement in the control of the particle size, uniformity of the particle diameter and the strength of the titanium trichloride catalytic component and hence at an improvement in the particle shape and uniformity of the polymer obtained using the catalytic component.
一种生产
三氯化钛催化组分的工艺,其中将
三氯化钛催化组分从溶剂中分离出来,溶剂中溶解有
四氯化钛、有机醚化合物和
有机铝化合物,其特征在于,溶剂是一种混合溶剂,按体积计,混合溶剂包括20%至70%的
芳香烃卤化物和饱和脂肪烃和/或脂
环烃,存在烯烃,
有机铝化合物。在溶剂温度不超过 55°C 时,将
四氯化钛和有机醚化合物加入混合溶剂中,然后在 10 分钟至 24 小时的时间内将溶剂加热到 45 至 150'C,加热过程可以中断,在加热阶段进一步加入有机醚化合物和/或
四氯化钛,以获得颗粒直径均匀为 10 至 500µ 的催化组分。
由此获得的
三氯化钛催化化合物可与
有机铝化合物一起用作 a-olefins 均聚合反应的催化剂体系。
本发明旨在改进对
三氯化钛催化组分的粒度、粒径均匀性和强度的控制,从而改进使用该催化组分制得的聚合物的粒形和均匀性。