Catalyst component

1. Process for preparing a particulate olefin polymerisation catalyst component of particles having a mean particle size from 5 to 500 μm, comprising:

forming an emulsion by admixing a solution of at least one Complex A, Complex A being a complex of at least a Group 2 metal compound and a monohydric alcohol comprising in addition to the hydroxyl moiety at least one further oxygen bearing moiety being different to a hydroxyl moiety, with at least one transition metal compound,

and solidifying the dispersed phase of said emulsion.

2. Process according to claim 1 , wherein the solution further comprises at least one Complex B, Complex B being a complex of at least a Group 2 metal compound and an alcohol not comprising any other oxygen bearing moiety being different to a hydroxyl moiety.

3. Process for preparing an olefin polymerisation catalyst component in the form of particles as defined in claim 1 , said process comprising the steps of:

a) providing a solution of at least one Complex A;

b) adding said solution to at least one compound of a transition metal and producing an emulsion the dispersed phase of which contains more than 50 mol % of the Group 2 metal;

c) agitating the emulsion in order to maintain the droplets of said dispersed phase;

d) solidifying said droplets of the dispersed phase; and

e) recovering the solidified particles of the olefin polymerisation catalyst component.

4. Process for preparing an olefin polymerisation catalyst component in the form of particles as defined in claim 1 , said process comprising the steps of:

f) providing a solution of a mixture of at least one Complex A and at least one additional Complex B;

g) adding said solution to at least one compound of a transition metal and producing an emulsion the dispersed phase of which contains more than 50 mol % of the Group 2 metal;

h) agitating the emulsion in order to maintain the droplets of said dispersed phase;

i) solidifying said droplets of the dispersed phase; and

j) recovering the solidified particles of the olefin polymerisation catalyst component.

5. The process of claim 3 , further comprising washing said solidified particles prior to recovering in step e).

6. A process according to claim 1 , wherein the monohydric alcohol comprising in addition to the hydroxyl moiety at least one further oxygen bearing moiety being different to a hydroxyl moiety is an alcohol bearing at least an ether moiety.

7. A process according to claim 1 , wherein the Complex A is prepared by reacting a compound of Group 2 metal with the monohydric alcohol comprising in addition to the hydroxyl moiety at least one further oxygen bearing moiety being different to a hydroxyl moiety in an organic liquid medium.

8. A process according to claim 2 , wherein the Complex B is prepared by reacting a compound of Group 2 metal with the alcohol not comprising any other oxygen bearing moiety being different to a hydroxyl moiety in an organic liquid medium.

9. A process according to claim 2 , wherein the molar ratio of complexes A and B in the solution is from 10:1 to 1:10.

10. A process according to claim 1 , wherein an internal electron donor is added to the solution of the at least one Complex A.

11. A process according to claim 1 , wherein said Group 2 metal is magnesium.

12. A process according to claim 1 , wherein said transition metal is a Group 4 metal and/or Group 5 metal.

13. Particles of the catalyst component obtainable according to the process of claim 1 .

14. An olefin polymerisation catalyst comprising particles of the catalyst component obtainable according to the process of claim 1 and a co-catalyst.

15. Use of the catalyst as defined in claim 14 for polymerising olefins.

16. The process of claim 4 , further comprising washing said solidified particles prior to recovering in step j).

17. The process according to claim 2 , wherein an internal electron donor is added to the solution of Complexes A and B.