Basf Aktiengesellschaft

Peter Kolle

Roland Hingmann

Jurgen Kerth

Rainer Hemmerich

Ulrich Moll

Franz Langhauser

Meinolf Kersting

Klaus-Dieter Hungenberg

Gunther Schweier

Erich Kolk

Patrik Muller

Ian D McKenzie

In catalyst systems of the Ziegler-Natta type modified during their preparation and comprising as active constituents

Ziegler-Natta catalyst systems modified during their preparation

In catalyst systems of the Ziegler-Natta type comprising as active constituents

Catalyst systems of the type comprising the Ziegler-Natta catalysts contain, as active components,

Catalyst systems of the type comprising the Ziegler-Natta catalysts

A process for the preparation of Ziegler-Natta type catalyst systems, containing, as active constituents a) a titanium-containing solid component, which contains in addition to a compound of titanium at least one electron donor compound, and is present in an inert solvent in the form of a suspension, and, as co-catalyst, b) an aluminum compound and c) optionally further electron donor compounds in which, following the preparation of the titanium-containing solid component a), the inert solvent present in the suspension is removed by first filtering the suspension in a first step, and then removing further solvent from the filtered material in a second step by applying a pressure difference at temperatures of not more than 100.degree. C.

Preparation of Ziegler-Natta type catalyst systems

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Bad Durkheim, Germany

Peter Kolle