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 {TAIL ~ a titanium halide} and then adding {HEAD ~ an electron donor} to the mixture of the titanium halide and the olefin 
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 { TAIL ~ a titanium halide } and then adding { HEAD ~ an electron donor } to the mixture of the titanium halide and the olefin
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH