TITANTRICHLORID-KATALYSATORBESTANDTEIL UND DESSEN VERWENDUNG BEI DER HOMOODER COPOLYMERISATION VON ALPHA -OLEFINEN

摘要

A titanium trichloride catalytic component obtained by separating it out of a solution consisting of titanium tetrachloride, an organic ether compound and an organo-aluminum compound dissolved in a solvent. The solvent is a mixture consisting of a saturated aliphatic hydrocarbon and/or an alicyclic hydrocarbon with 20 to 70% by volume of a concomitant aromatic hydrocarbon halide included therein. The organo-aluminum compound, the titanium tetrachloride and the organic ether compound is added to this mixed solvent at a solvent temperature not exceeding 55 DEG C. Following this, the solvent temperature is raised up to a value between 45 DEG and 150 DEG C. over a period of 10 minutes to 24 hours with an organic ether compound and/or titanium tetrachloride further added during this temperature raising process to obtain thereby a titanium trichloride catalytic component having average particle diameter between 10 and 1000 mu . Then homo- or co-polymerization of alpha -olefin is carried out by using a catalyst system comprising this catalytic component and an organo-aluminum compound.