Polymerization of olefins with a catalyst slurry preactivated with ethylene

Claim 1

IN THE POLYMERIZATION OF POLYMERIZABLE MATERIAL CONSISTING OF AT LEAST ONE A-MONOOLEFIN OF 2-10 CARBON ATOMS BY MEANS OF AN IONIC CATALYST MIXTURE EFFECTIVE TO POLYMERIZE SUCH POLYMERIZABLE MATERIAL, INCLUDING A METAL ALKYL AND TITANIUM COMPOUND, IN AN INERT ORGANIC LIQUID VEHICLE BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS AND CHLORINATED HYDROCARBONS, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE POLYMERIZATION OF SAID POLYMERIZABLE MATERIAL IN SAID INERT ORGANIC LIQUID VEHICLE BY BRINGING TOGETHER SAID POLYMERIZABLE MATERIAL, SAID INERT ORGANIC LIQUID VEHICLE AND 0.01-0.5% BY WEIGHT BASED ON SAID VEHICLE OF A CATALYTIC SLURRY OF GREATLY ENHANCED ACTIVITY OBTAINED BY PREREACTING A SLURRY. IN AN INERT ORGANIC LIQUID VEHICLE, OF 1-10% BY WEIGHT OF SAID CATALYST MIXTURE BASED ON THE WEIGHT OF VEHICLE IN SAID SLURRY AND 2-3 PARTS BY WEIGHT OF ETHYLENE BASED ON THE WEIGHT OF SAID CATALYST MIXTURE.