| 摘要 |
- 19 - O.Z. 0050/39143 Polymers of propene are prepared using a Ziegler-Natta catalyst system consisting of (1) a titanium component which is based on a finely divided, shape-imparting silica gel and, in addition to titanium, contains magnesium, chlorine and a benzenecarboxylic acid derivative, (2) an alumino component and (3) a silane component. The process employs a titanium component (1) which is obtained by a method in which (1.1) first (I) a carrier is prepared from (Ia) a silica gel, (Ib) an organomagnesium compound and (Ic) a gaseous chlorinating agent by a procedure in which (1.1.1) first (Ia) is reacted with (Ib), (1.1.2) then (Ic) is passed into the product obtained from (1.1.1) and (I) is isolated, (1.2) thereafter, a solid-phase intermediate is prepared from (I), (II) an alkanol, (III) titanium tetrachloride and (IV) a phthalic acid derivative by a procedure in which (1.2.1) first (I) is reacted with (II), (1.2.2) then (III) is introduced into the product resulting from (1.2.1), with the proviso that (IV) is also introduced in (1.2.1) or (1.2.2), (1.3) then the solid-phase product resulting from (1.2) is extracted with titanium tetrachloride, and (1.4) finally, the solid-phase product resulting from (1.3) is washed with a liquid hydrocarbon. |
