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US 7,256,150 B2Granted
Preparation of olefin polymerization catalyst component
AssigneeBorealis Polymers Oy
InventorsPeter Denifl, Timo Leinonen
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Abstract
A process for producing a Gp 2/transition metal olefin polymerisation catalyst component, in which a Gp 2 complex is reacted with a transition metal compound so as to produce an oil-in-oil emulsion, the disperse phase containing the preponderance of the Gp 2 metal being selectively sorbed on a carrier to provide a catalyst component of excellent morphology. Polymerisation of olefins using a catalyst containing such a component is also disclosed.
Claims32
A process for producing an olefin polymerisation catalyst component in the form of particles, comprising:
- preparing a solution of a complex of a Group 2 metal and an electron donor by reacting a compound of said Group 2 metal with said electron donor or a precursor thereof in an organic liquid reaction medium;
- reacting said complex, in solution, with at least one compound of a transition metal to produce two oils, wherein the first oil is denser oil comprising more than 50 mol % of the Group 2 metal in said complex and the second oil is a lighter oil being immiscible with the denser oil;
- preferentially sorbing said denser oil into a porous carrier comprising carrier particles having an average particle size of 10 to 200 μm and a pore volume of 0.5 to 4 ml/g;
- solidifying said sorbed oil contained by said carrier, wherein said solidified sorbed oil comprises catalyst component particles;
- and
- recovering, washing and drying the carrier to obtain said catalyst component particles.
3 more elements
Dependencies are inferred from the claim text.