Polymerization of alpha-olefines

Claim 1

IN THE POLYMERIZATION OF BUTENE-1 IN CONTACT WITH A CATALYST PREPARED BY (1) STARTING WITH SUBSTANTIALLY SOILD, CRYSTALLINE TITANIUM TRICHLORIDE AND (2) MIXING THE TRICHLORIDE WITH AN ALUMINUM TRIALKYL WHEREIN THE ALKYL GROUPS CONTAIN FROM 1 TO 4 CARBON ATOMS, WHICH CATALYSTS NORMALLY RESULT IN BUTENE-1 POLYMERIZATES COMPRISING SOME OILY, LOW MOLECULAR WEIGHT 1-POLYBUTENES, SOME HIGHER MOLECLULAR WEIGHT AMORPHOUS 1-POLYBUTENES, AND CRYSTALLIZABLE 1-POLYBUTENES, THE IMPROVEMENT WHICH COMPRISES ORIENTING THE POLYMERIZATIONTO THE PREFERENTIAL PRODUCTION OF AMORPHOUS 1-POLYBUTENE BY CARRYING OUT THE POLYMERIZATION OF THEBUTENE-1 IN CONTACT WITH SAID CATALYST IN A SYSTEM CONTAINING AN ANHYDROUS, FINELY DIVIDED SOLID SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE INORGANIC HALIDES, WATER-SOLUBLE INORGANIC SULFATES, CARBORUNDUM, DIATOMACEOUS EARTH AND FINELY DIVIDED QUARTZ, HAVING A PARTICLE SIZE BETWEEN 10 MICRONS AND 1000 MICRONS AND WHICH IS CHEMICALLY INERT TO THE CATAALYST AND TO BUTENE-1.