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US 2017/0283521 A1Published application
Ziegler-Natta - Metallocene Dual Catalyst Systems with Activator-Supports
AssigneeChevron Phillips Chemical Company LP
InventorsErrun Ding, Chung C. Tso, Youlu Yu, Qing Yang, Richard M. Buck
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Abstract
Catalyst systems having both a metallocene catalyst component and a Ziegler-Natta component are disclosed. Such catalyst systems can contain a metallocene compound, an activator-support, an organoaluminum compound, and a Ziegler-Natta component comprising titanium supported on magnesium chloride.
Claims20
1-8. (canceled)
An olefin polymerization process, the process comprising:
- contacting (i) a metallocene compound, (ii) a Ziegler-Natta component comprising titanium supported on MgCl2, (iii) an activator-support, and (iv) an organoaluminum compound, to form a catalyst composition;
- and
- contacting the catalyst composition with an olefin monomer and an optional olefin comonomer in a polymerization reactor system under polymerization conditions to produce an olefin polymer.
A process to produce a catalyst composition, the process comprising:
- (a) contacting an activator-support and an organoaluminum compound for a first period of time to form a precontacted mixture;
- and
- (b) contacting the precontacted mixture with a metallocene compound and a Ziegler-Natta component comprising titanium supported on MgCl2 for a second period of time to form the catalyst composition.
Dependencies are inferred from the claim text.