Removal of metal contaminants in polymerization processes

Claim 1

A PROCESS OF PREPARING A SOLID PLASTIC WHICH COMPRISES POLYMERIZING A C2-C3 MONOOLEFINIC HYDROCARBON IN A POLYMERIZATION STAGE IN THE PRESENCE OF AN INERT HYDROCARBON DILUENT AND A POLYMERIZATION CATALYST OBTAINED BY MIXING A TITANIUM CHLORIDE WITH AN ALUMINUM COMPOUND OF THE FORMULA AL(C2H5)2R, WHEREIN R IS OF THE CLASS CONSISTING OF ETHYL AND CHLORINE, MECHANICALLY SEPARATING THE RESULTING REACTION MIXTURE IN AN ATMOSPHERE OF NITROGEN INTO A SOLID POLYMER PORTION AND A LIQUID DILUENT PORTION CONTAINING SOME METAL COMPOUNDS DISSOLVED THEREIN, PASSING THE SEPARATED DILUENT PORTION AT SUBSTANTIALLY ATMOSPHERIC TEMPERATURE THROUGH A BED OF AN ION EXCHANGE RESIN IN ITS ACID FORM AND RECYCLING THE RESIN TREATED DILUENT TO THE POLYMERIZATION STAGE.