Olefin polymerization in presence of purified carbon black

Claim 1

IN A PROCESS OF POLYMERIZING AN ALPHA UNSATURATED OLEFIN HYDROCARBON COMPRISING ETHYLENE IN PRESENCE OF CARBON BLACK TO FORM DIRECTLY A COMPOSITION OF OLEFIN POLYMER AND MINOR PROPORTIONS OF CARBON BLACK, THE IMPROVEMENT WHICH COMPRISES: EMPLOYING CARBON BLACK OF THE "COLOR BLACK" CLASS; REMOVING POISONS FROM SAID CARBON BLACK BY DISTILLING OFF LIQUID HYDROCARBON FROM A SLURRY OF THE CARBON BLACK IN A LIQUID HYDROCARBON; IMPREGNATING THE CARBON BLACK THUS FREED OF POISONS WITH CHROMYL CHLORIDE BY INTRODUCING CHROMYL CHLORIDE INTO THE SAID CARBON BLACK SLURRY FREED OF POISONS; BRINGING THE CHROMYL CHLORIDE INTO A REDUCED FORM BY EXPOSURE TO AN ALUMINO HYDROCARBON; CONTACTING SAID OLEFINIC HYDROCARBON WITH SAID SUPPORTED AND REDUCED CHROMYL CHLORIDE IN SAID SLURRY UNDER POLYMERIZATION CONDITIONS; AND MAINTAINING POLYMERIZATION CONDITIONS UNTIL THE RESULTING COMPOSITION OF OLEFIN POLYMER AND CARBON BLACK CONTAINS ABOUT 1%10% BY WEIGHT OF CARBON BLACK.