Chevron Phillips Chemical Company LP

Chevron Philips Chemical Company, LP

Richard M Buck

Qing R Yang

Albert P Masino

Errun Ding

Max P McDaniel

Christopher E Wittner

Youlu Yu

Paul J DesLauriers

Chung Ching Tso

Guylaine St Jean

Ashish M Sukhadia

Mark L Hlavinka

Brooke L Small

Yongwoo Inn

Bruce E Kreischer

Eduardo J Baralt

Eric J Netemeyer

William B Beaulieu

Kenneth D Hope

Lili Cui

Tony R Crain

Rex E Murray

Ryan N Rose

Paul J Deslauriers

Qing Yang

Steven M Bischof

Orson L Sydora

Steven J Secora

Graham R Lief

Elizabeth Mary Lanier

Daniel Halsell Ess

Jon D Ratzlaff

Steven M Maley

Max P Mcdaniel

This disclosure provides new methods for the design and development of ethylene polymerization catalysts, including Group 4 metallocene catalysts such as zirconocenes, which are based on an improved ability to adjust co-monomer incorporation into the polymer. Computational analyses with and without dispersion corrections revealed that designing catalyst scaffolds which induce stabilizing non-covalent dispersion type interactions with incoming α-olefin co-monomers can be used to modulate co-monomer selectivity into the polyethylene chain. Demonstrated herein is a lack of correlation of computed ΔΔGvalues against experimental ΔΔGvalues when the dispersion correction (D3BJ) was disabled, and B3LYP was used in the absence of Grimme's D3 dispersion and Becke-Johnson (BJ) dampening, but a correlation of computed against experimental ΔΔGwith B3LYP+D3BJ, which are used to design new catalyst scaffolds.

Modulating co-monomer selectivity using non-covalent dispersion interactions in group 4 olefin polymerization catalysts

Methods for simultaneously determining the concentrations of transition metal compounds in solutions containing two or more transition metal compounds are described. Polymerization reactor systems providing real-time monitoring and control of the concentrations of the transition metal components of a multicomponent catalyst system are disclosed, as well as methods for operating such polymerization reactor systems, and for improving methods of preparing the multicomponent catalyst system.

Methods for determining transition metal compound concentrations in multicomponent liquid systems

Methods for determining the catalytic activity of an activated chemically-treated solid oxide using a color measurement technique are described, and these methods are integrated into transition metal-based catalyst preparation processes and systems, as well as into olefin polymerization processes and related polymerization reactor systems.

Methods for determining the activity of an activated chemically-treated solid oxide in olefin polymerizations

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.

Ziegler-Natta&#x2014;metallocene dual catalyst systems with activator-supports

Methods for simultaneously determining the concentrations of transition metal compounds in solutions containing two or more transition metal compounds are described. Polymerization reactor systems providing real-time monitoring and control of the concentrations of the transition metal components of a multicomponent catalyst system are disclosed, as well as methods for operating such polymerization reactor systems.

Methods for determining the concentration of transition metal compounds in a solution containing more than one transition metal compound are described. Polymerization reactor systems providing real-time monitoring and control of the concentrations of the transition metal components of a multicomponent catalyst system are disclosed, as well as methods for operating such polymerization reactor systems and for improving methods of preparing the multicomponent catalyst system.

Methods for determining the concentration of transition metal compounds in a solution containing more than one transition metal compound are described. Polymerization reactor systems providing real-time monitoring and control of the concentrations of the transition metal components of a multicomponent catalyst system are disclosed, as well as methods for operating such polymerization reactor systems.

Ziegler-natta&#x2014;metallocene dual catalyst systems with activator-supports

Methods for making alpha olefin oligomers and polyalphaolefins include a step of contacting a Cto Calpha olefin monomer and a catalyst system containing a metallocene, a first activator comprising a solid oxide chemically-treated with an electron withdrawing anion, and a second activator comprising an organoaluminum compound. The alpha olefin oligomers and polyalphaolefins prepared with these catalyst systems can have a high viscosity index combined with a low pour point, making them particularly useful in lubricant compositions and as viscosity modifiers.

Oligomerization of alpha olefins using metallocene-SSA catalyst systems and use of the resultant polyalphaolefins to prepare lubricant blends

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Bartlesville, OK, United States of America

Richard M Buck