Patent ID: 9260548
Filing Date: 2016-02-16
CPC Classification: C08F

Claim Text:
1. An olefin polymerisation catalyst comprising an olefin polymerization catalyst component in the form of spherical particles in an average size range of 5 to 200 μm; and a cocatalyst, wherein said olefin polymerization catalyst component is free of carrier material and is prepared by a process comprising the steps of: a) preparing a solution of a complex of a Group 2 metal and an electron donor by reacting a compound of said metal with said electron donor or a precursor thereof in an organic liquid reaction medium; b) adding said solution of said complex to at least one compound of a transition metal to produce an emulsion having a dispersed phase and a disperse phase, the dispersed phase of which contains more than 50 mol% of the Group 2 metal in said complex; c) agitating the emulsion in order to maintain the droplets of said dispersed phase within such an average size range of 5 to 200 μm; d) solidifying said droplets of the dispersed phase by heating, wherein the solidification is not a precipitation reaction; and e) recovering the solidified particles of the olefin polymerization catalyst component; wherein an aluminium alkyl compound of the general formula AlR