Shell Oil Comapny

Adrianus A Van Der Nat

Willem Sjardijn

Brian L Goodall

Andras G Kortbeek

Wilhelmina J Van Der Linden Lemmers

A highly active and stereoselective olefin polymerization catalyst component is obtained by halogenating a magnesium compound of the formula MgR.sub.1 R.sub.2 wherein R.sub.1 is an alkoxide or aryloxide group and R.sub.2 is an alkoxide or aryloxide group or halogen, with a halide of tetravalent titanium in the presence of a halohydrocarbon and an electron donor, and contacting the halogenated product with a tetravalent titanium halide.

Olefin polymerization catalyst compositions and a process for the

An olefin polymerization catalyst composition comprising: (a) a reaction product of an organoaluminum compound and an electron donor, and (b) a solid component which has been obtained by halogenating a magnesium compound with the formula MgR.sub.1 R.sub.2 wherein R.sub.1 is an alkyl, aryl, alkoxide or aryloxide group and R.sub.2 is an alkyl, aryl, alkoxide or aryloxide group or halogen, with a halide of tetravalent titanium in the presence of a halohydrocarbon, and contacting the halogenated product with a tetravalent titanium compound.

An olefin polymerization process comprises contacting the monomer to be polymerized with a catalyst composition comprising: an organoaluminum compound, a first electron donor, and a product obtained by contacting a solid component comprising a magnesium halide in which the atomic ratio of chlorine to magnesium is at least 1.2, a titanium halide and a second electron donor, with a halohydrocarbon and thereafter with a tetravalent titanium compound.

Olefin polymerization process with novel supported titanium catalyst

An olefin polymerization catalyst composition comprising:

Olefin polymerization catalyst component and composition and method of

A titanium trichloride-catalyzed process for stereospecific polymerization of alpha-olefins, particularly propylene, to produce polymers of relatively high bulk density comprises employing as the TiCl.sub.3 catalyst component, used with an aluminum alkyl cocatalyst, a 0.1 to 30 millimicron fraction of a TiCl.sub.3 composition produced by

Preparation of an active ticl.sub.3 catalyst

A process for the preparation of violet TiCl.sub.3 by reducing TiCl.sub.4 with an organo-aluminum compound, characterized in that:

Preparation of violet TiCl.sub.3

A process for the preparation of an active TiCl.sub.3 catalyst which comprises:

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Amsterdam, Netherlands

Adrianus A Van Der Nat