| abstract |
A PROCESS FOR THE POLYMERIZATION OF ETHYLENE OR COPOLYMERIZATION OF ETHYLENE WITH ANOTHER OLEFIN IN THE PRESENCE OF A SPECIFICALLY DEFINED CATALYST, AS WELL AS SUCH CATALYST PER SE, THE CATALYST COMPRISING (A) A CARRIER-SUPPORTED TRANSISTION METAL COMPOUND CATALYST COMPONENT, THE CATALYST COMPONENT BEING OBTAINED BY (A) ADDING TO A HYDROCARBON SOLVENT A FINELY DIVIDED SOLID INORGANIC COMPOUND CARRIER OF MAGNESIUM OR CALCIUM AND 0.05-10 MILLIMOLS PER GRAM OF THE INORGANIC COMPOUND OF AN ORGANOALUMINUM COMPOUND, THE INORGANIC COMPOUND CARRIER BEING INSOLUBLE IN THE HYDROCARBON SOLVENT, (B) ADDING TO THE RESULTING MIXTURE A HALIDE OF VANADIUM AND A HALIDE OF TITANIUM, THE HALIDE OF TITANIUM BEING ADDED IN AN AMOUNT OF NOT MORE THAN 5 MOLS PER MOL OF THE HALIDE OF VANADIUM, THE SUM TOTAL NUMBER OF MOLS OF VANADIUM AND TITANIUM BEING IN THE RANGE OF 0.001-1 MOL PER MOL OF THE ORGANIC GROUPS OF THE ALUMINUM COMPOUND OF (A), ABOVE, AND (C) REACTING THE SO-FORMED LIQUID SYSTEM CONTAINING FINELY DIVIDED SOLID INORGANIC COMPOUND CARRIER UNTIL SUBSTANTIALLY NO FREE TITANIUM AND VANADIUM COMPOUNDS ARE DETECTED IN THE LIQUID PHASE OF THE SYSTEM; AND (B) AN ORGANOALUMINUM COMPOUND CATALYST COMPONENT. |