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POLYPROP Résumé de rapport

Project ID: G5RD-CT-2001-00597
Financé au titre de: FP5-GROWTH
Pays: Spain

Development of supported metallocene catalysts

Repsol’s interest is to develop new supported metallocene catalysts to produce Polypropylene, homo and copolymers, with the typical characteristics of metallocene polyolefins but without to modify the existing commercial plants.

Exploitation on pilot plant studies should be immediate. Evaluation of methods for increased/improved production will be validated on a new pilot plant starting 2004. This information will be used to test the feasibility of construction of a new commercial gas phase plant in the near future.

Several supported catalysts have been prepared based on Repsol’s Metallocene Technology, using different supports and different metallocene compounds. Experimental data have been obtained to validate the models proposed by other groups in the Consortium: Kinetic data and, Evolution of catalytic particle shape and aggregated state, particle size and distribution and pore volume and distribution. Some chosen supported catalysts, due to the better morphological behaviour, were studied in polymerization.

Polypropylene homopolymers were obtained at 60 and 70°C and their molecular characterization were carried out in order to know the evolution of the material properties during the polymerisation process.

The performance of the developed supported metallocene catalysts was demonstrated to be better than the previous described in the state-of-the-art due to the homogeneous characteristic of the produced polypropylenes, independently of the residence time.

Informations connexes

Reported by

Centro de Tecnologia Repsol YPF, Ctra de Extremadura, Km 18
28930 MADRID