Olefin polymerization process

Claim 1

IN A CONTINUOUS PROCESS FOR THE POLYMERIZATION OF AN AOLEFIN FEED SUBSTANTIALLY FREE OF CATALYST CONTEMINANTS IN THE PRESENCE OF A TITANIUM TRICHLORIDE CATALYST ACTIVATED BY AN ORGANOALUMINIM COMPOUND IN A MOLAR RATIO OF ORGANOALUMINUM COMPOUND TO TITANIUM CHLORIDE BETWEEN ABOUT 1.5:1 AND ABOUT 150:1 IN A REACTION ZONE MAINTAINED AT ELEVATED PRESSURE, WHEREIN A SLURRY COMPRISED OF POLYMER AND UNREACTED MONOMER IS WIHDRAWN FROM THE REACTION ZONE, AND THE SLURRY IS FLASHED IN A LOW PRESSURE SEPARATION ZONE FROM WHICH ARE SEPARATELY WITDRAWN A VAPOR COMPRISED OF UNREACTED MONOMER AND A POLYMER, THE IMPROVEMENT WHICH COMPRISES: INITMATELY CONTACTING AN A-OLEFIN STREAM CONTAINING CATALYST CONTAMINANTS WITH AT LEAST A SUFFICIENT AMOUNT OF ORGANOALUMINUM COMPOUND TO DEACTIVATE SAID CATALYST CONTAMINANTS AND TO PROVIDE SAID A-OLEFIN FEED SUBSTANTIALLY FREE OF CATALYST CONTAMINANTS AND PASSING SAID FEED IN THE ABSENCE OF CATALYST DIRECTLY TO THE REACTION ZONE, COMPRESSING AT LEAST A PORTION OF THE VAPOR FROM THE LOW PRESSURE SEPARATION ZONE AND INTRODUCING THE TITANIUM TRICHLORIDE CATALYST IN THE ABSENCE OF ORGANOALUMINUM COMPOUND WITH AT LEAST PART OF THE COMPRESSED STREAM DIRECTLY INTO THE REACTION ZONE.