Process for the production of a catalyst component for use in the polymerization of alpha olefins

A process for the production of a catalyst component for use in polymerization of alpha-olefins which comprises:

• reducing titanium tetrachloride with a mixture of a dialkyl aluminum halide with an alkyl aluminum dihalide, wherein said dialkyl aluminum halide is employed in an amount of at least 1 mole per 1 mole of titanium tetrachloride and said alkyl aluminum dihalide is employed in an amount within the range of from 0.3 to 1.2 moles per 1 mole of titanium tetrachloride, to obtain a violet titanium trichloride reduced solid containing aluminum compounds;
• removing aluminum compounds from said violet titanium trichloride reduced solid;
• and thereafter
• contacting said violet titanium trichloride reduced solid in an inert diluent with an activator selected from the group consisting of a complex of diisoamyl ether and titanium tetrachloride, and a mixture of diisoamyl ether and titanium tetrachloride at a temperature within the range of from -30.degree. to 100.degree. C for at least 30 minutes, wherein the mole ratio of diisoamyl ether to titanium trichloride is at least 0.1 and the concentration of titanium tetrachloride in the diluent is maintained at at least 1 volume percent.