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