{HEAD ~ A process} is disclosed for producing, in situ and without milling or grinding, {TAIL ~ an alpha olefin polymerization catalyst component} which comprises adding an olefin to a titanium halide and then adding an electron donor to the mixture of the titanium halide and the olefin 
is disclosed for producing
{ HEAD ~ A process } is disclosed for producing , in situ and without milling or grinding , { TAIL ~ an alpha olefin polymerization catalyst component } which comprises adding an olefin to a titanium halide and then adding an electron donor to the mixture of the titanium halide and the olefin
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