Process for preparing high molecular olefin polymers using a catalyst consisting of an alumino-organic compound, an inorganic heavy metal salt and oxygen

Claim 1

A PROCESS FOR PREPARING HIGH MOLECULAR POLYOLEFINS WHICH COMPRISES CONTACTING AN OLEFIN MIXTURE CONTAINING 8-100% BY VOLUME PROPYLENE AND 92-0% BY VOLUME ETHYLENE WITH A CATALYST SYSTEM CONSISTING OF (1) AN ALUMINO-ORGANIC COMPOUND AND (2) AN INORGANIC SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM, HAFNIUM, VANADIUM, NIOBIUM, TANTALUM, CHROMIUM, MOLYBDENUM, TUNGSTEN, THORIUM AND URANIUM IN AN INERT SOLVENT AT A TEMPERATURE BETWEEN 40 AND 80*C AND A PRESSURE BETWEEN 0 AND 150 ATMOSPHERES GAUGE WHILE ADDING OXYGEN IN AN AMOUNT OF AT LEAST 0.025% BY VOLUME, CALCULATED ON THE OLEFINS, TO THE REACTION MIXTURE, THE ADDITION OF OXYGEN SERVING TO INCREASE THE POLYMERIZATION RATE, AND SUBSEQUENTLY SEPARATING THE POLYMERIZATION PRODUCT, THE MOLECULAR WEIGHT OF THE LATTER DIMINISHING WHEN INCREASING AMOUNTS OF OXYGEN ARE ADDED TO THE REACTION MIXTURE.