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

US9745230B2 · kind B2 · utility

Assignee

• Chevron Phillips Chemical Company LP · US

Inventors

• Brooke L. Small · Kingwood, US
• Kenneth D. Hope · Kingwood, US
• Qing Yang · Bartlesville, US
• Albert P. Masino · Hamilton, US
• Max P. McDaniel · Bartlesville, US
• Richard M. Buck · Bartlesville, US
• William B. Beaulieu · Tulsa, US
• Eduardo J. Baralt · Emeryville, US
• Eric J. Netemeyer · Kingwood, US
• Bruce E. Kreischer · Humble, US

Key dates

• Filing date: Apr 7, 2016
• Grant date: Aug 29, 2017
• Expiry date: Apr 7, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Methods for making alpha olefin oligomers and polyalphaolefins include a step of contacting a C4 to C20 alpha 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.