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US 2017/0283595 A1Published application
Olefin polymerization method using barium ferrite-containing catalyst nanoparticles
AssigneeKing Fahd University of Petroleum and Minerals
InventorsMamdouh Ahmad AL-HARTHI, Farrukh SHEHZAD
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Abstract
A method involving polymerizing ethylene in the presence of a catalyst composition containing BaFe12O19 nanoparticles, a zirconocene catalyst, and an alkylaluminoxane co-catalyst. A nanocomposite is formed by the polymerization, whereby the BaFe12O19 nanoparticles are dispersed in a matrix of polyethylene (PE), and the % crystallinity is lowered. The activity of the catalyst is increased in the presence of the BaFe12O19 nanoparticles.
Claims13
A method, comprising:
- polymerizing ethylene in the presence of a catalyst composition comprising BaFe12O19 nanoparticles, a zirconocene catalyst, and an alkylaluminoxane co-catalyst, wherein the BaFe12O19 nanoparticles are not pre-reacted or pre-mixed with the zirconocene catalyst or the alkylaluminoxane co-catalyst and wherein a weight ratio of the BaFe12O19 nanoparticles to the zirconocene catalyst is 0.5:1 to 3:1;
- wherein the polymerizing forms a nanocomposite in which the BaFe12O19 nanoparticles are dispersed in a matrix of polyethylene (PE).
Dependencies are inferred from the claim text.