Chevron Phillips Chemical Company LP

Eric J Haschke

Graham R Lief

Uriah J Kilgore

Qing R Yang

Pasquale Iacono

Disclosed are metallocene compounds, catalyst compositions comprising at least one metallocene compound, processes for polymerizing olefins, methods for making catalyst compositions, olefin polymers and articles made from olefin polymers. In an aspect, a metallocene compound and catalyst composition are disclosed in which the metallocene contains at least one indenyl ligand, the indenyl ligand containing at least one halogenated substituent, such as a fluorinated substituent. These metallocene compounds and catalyst compositions can produce polyethylene having unexpectedly low levels of short chain branching.

Catalyst composition and method for preparing polyethylene

Disclosed herein are high melt flow polypropylene homopolymers generally characterized by a melt flow rate ranging from 200 g/10 min to 3000 g/10 min, a ratio of Mw/Mn ranging from 2 to 5, and a peak melting point ranging from 138&#xb0; C. to 151&#xb0; C. These polypropylene homopolymers can be produced by catalyst systems containing a racemic ansa-bis(indenyl)zirconocene compound, an activator-support, and an organoaluminum co-catalyst.

High melt flow polypropylene homopolymers for fiber applications

The present invention discloses processes for oligomerizing an olefin feedstock containing Cto Calpha olefins using a catalyst system containing a metallocene compound, an organoaluminum compound, and a suspension of a chemically-treated solid oxide. The liquid medium for the suspension of the chemically-treated solid oxide can be an alpha-olefin oligomer product formed by the oligomerization process.

Methods for the preparation and use of suspensions of chemically-treated solid oxides in an olefin-derived liquid medium

Disclosed herein are dual catalyst compositions containing an unbridged metallocene compound, a bridged metallocene compound, a chemically-treated solid oxide, and an optional co-catalyst. These catalyst compositions can be used for the oligomerization of propylene to produce an oligomer product. For example, a heavy propylene oligomer can be recovered from the oligomer product, and the heavy propylene oligomer can be characterized by a high flash point and viscosity index, and a low pour point.

Process for reducing the light oligomer content of polypropylene oils

Disclosed herein are oligomerization processes using feedstocks containing propylene to produce an oligomer product, and methods for recovering a propylene oligomer from the oligomer product. The resultant propylene oligomer can be characterized by a Mn in a range from 250 to 10,000 g/mol, a viscosity index of at least 85, and a pour point in a range from &#x2212;5 to &#x2212;60&#xb0; C.

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Bartlesville, OK, United States of America

Eric J Haschke