Olefin copolymerization process

Claim 1

IN THE PROCESS FOR COPOLYMERIZING ETHYLENE WITH AT LEAST ONE OTHER ETHYLENICALLY UNSATURATED HYDROCARBON IN CARBON TETRACHLORIDE IN THE PRESENCE OF A CATALYST FORMED FROM A VANADIUM COMPOUND SOLUBLE THEREIN AND AN ALKYLALUMINUM COMPOUND, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE COPOLYMERIZATION IN THE PRESENCE OF, PER LITER OF CARBON TETRACHLORIDE, ABOUT 0.0005 TO ABOUT 0.05 MMOLE OF SAID VANADIUM COMPOUND AND ABOUT 0.1 TO ABOUT 100 MMOLES OS SAID ALKYLALUMINUM COMPOUND, AND IN THE PRESENCE OF AN ELECTRON DONOR COMPOUND SELECTED FROM THE GROUP CONSISTING OF AMMONIA, AMINES, AMIDES, NITRILES, PYRIDINES, PHOSPHINES, PHOSPHITES, PHOSPHOROUS HALIDES, ARSINES, ARSENIC HALIDES, STIBINES, ANTIMONY HALIDES, BISMUTHINES, BISMUTH HALIDES, ETHERS, ESTERS, ALDEHYDES, KETONES, ACID HALIDES, PHENOLS, SULFOXIDES, SULFONES, SUFATES, SULFONATES, SUFONAMIDES, SULFOXIMES, SULFIDES, SELENIDES, AND TELLURIDES, SAID ELECTRON DONOR COMPOUND BEING CHEMICALLY REACTIVE WITH THE ALKYLALUMINUM COMPOUND BY SHARING ELECTRONS THEREWITH AND BEING PRESENT IN AN AMOUNT SUFFICIENT TO ACTIVATE SAID CATALYST BUT INSUFFICIENT TO COMPLEX ALL OF SAID ALKYLALUMINUM COMPOUND.