Examination of the effects of different internal electron donors of Ziegler-Natta catalysts on propylene polymerization

There are two polypropylene (PP) plants operating at TVK (Hungary) based on Spheripol process, at nominal capacity of 100 and 180 kt/y respectively.

Basic properties of the PP grades produced by these plants highly depend on the technology and the polymerization materials, e.g. the catalysts (containing also improved internal electron donor (ID)) and external electron donor (ED).

Imre Balogh