Polymerization of Polypropylene Using Multi-Catalyst/Cocatalyst Systems and Investigation of Physical and Molecular Properties of Products

Advancing the chemical engineering fundamentals

Chemical Reaction Engineering (T2-2P)

Prof Ahmad Ramazani S.A.
Sharif University of Technology
Chemical & Petroleum Engineering
Chemical & Petroleum Engineering, Sharif University of Technology, Azadi Street, Tehran- Iran
Islamic Republic of Iran

Mr Ali Dashti
Sharif University of Technology
Chemical and Petroleum Engineeering

Islamic Republic of Iran

Mrs Sima Rezvantalab
Sharif University of Technology
Chemical and Petroleum Engineeering

Islamic Republic of Iran

Keywords: Polypropylene, Polymerization, Molecular Weight Distribution, Ziegler-Natta, Cocatalysts

To produce polypropylene with specific rheological and molecular weight distribution, polymerization of propylene has been done with different combinations of catalysts and cocatalyst types and their concentrations in slurry phase in semi-batch reactor. Two types of Titanium supported (Ziegler-Natta) catalysts with internal and external donors have been used with Triethylaluminum (TEA) and Triisobutylaluminum (TiBA) as cocatalysts in different concentrations. Also, effects of some main reaction parameters such as prepolymerization and polymerization conditions, hydrogen concentration, Al/Ti ratios on polymer yield and properties of product have been investigated. Obtained results from GPC tests showed that in appropriate combination of catalysts and cocatalysts, we are able produce broad molecular weight distribution and even bimodal polypropylene in one reactor with ZN catalysts.

Presented Tuesday 18, 13:30 to 15:00, in session Chemical Reaction Engineering (T2-2P).