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US 4,543,400 AGranted
Titanium trichloride catalyst component and the process for the production thereof
AssigneeExxon Research & Engineering Co.
InventorHarry J. Wristers
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AssigneeExxon Research & Engineering Co.
InventorHarry J. Wristers
Estimating the term…
A titanium trichloride catalyst component containing a minor amount of prepolymerized alpha-olefin and useful in the polymerization of alpha-olefins is produced by reducing titanium tetrachloride with an organoaluminum compound at low temperatures and then treating the resulting reduced solids product with about 1 to 1,000 wt. % alpha-olefin so as to obtain a prepolymerized titanium trichloride reduced solid. The prepolymerized reduced solid can thereafter be activate to a highly active prepolymerized titanium trichloride by treating the prepolymerized reduced solid with a halogenated hydrocarbon and a Lewis base complexing agent or titanium tetrachloride and a Lewis base complexing agent. The prepolymerized reduced solid and the prepolymerized activated titanium trichloride manifests substantially no evidence of friability upon being subjected to mechanical shearing forces. The resulting prepolymerized activated titanium trichloride composition, when employed in combination with an organo-metal compound results in an unexpectedly highly active catalyst obtaining polymers with high heptane insolubles.
In a process for the polymerization of .alpha.-olefins, wherein an .alpha.-olefin is contacted with a Ziegler-type catalyst comprising TiCl.sub.3 and an organometallic compound under .alpha.-olefin polymerization conditions, the improvement comprising employing as said TiCl.sub.3, a non-friable, highly active TiCl.sub.3 catalyst composition produced by:
In a process for the polymerization of propylene, wherein propylene is contacted with a Ziegler-type catalyst comprising TiCl.sub.3 and an organometallic compound under propylene polymerization conditions, the improvement comprising employing as said TiCl.sub.3, a non-friable, highly active TiCl.sub.3 catalyst composition produced by:
In a process for the polymerization of propylene, wherein propylene is contacted with a Ziegler-type catalyst comprising TiCl.sub.3 and an organometallic compound under propylene polymerization conditions, the improvement comprising employing as said TiCl.sub.3, a non-friable, highly-active TiCl.sub.3 catalyst composition produced by:
Dependencies are inferred from the claim text.