The process 5 wherein {HEAD ~ unreacted olefin} is removed from {TAIL ~ the titanium halide} before the electron donor is added 
The process 5 wherein { HEAD ~ unreacted olefin } is removed from { TAIL ~ the titanium halide } before the electron donor is added
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH