Base stocks and lubricant compositions containing same

US10920159B2 · kind B2 · utility

Assignee

• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US

Inventors

• Rugved P. Pathare · Sarnia, CA
• Lisa I-Ching Yeh · Marlton, US
• Yogi V. Shukla · Cherry Hill, US
• Charles L. Baker, Jr. · Thornton, US
• Bryan E. Hagee · Hamilton, US
• Debra A. Sysyn · Sparta, US
• Kendall S. Fruchey · Easton, US

Key dates

• Filing date: Jul 31, 2019
• Grant date: Feb 16, 2021
• Expiry date: Jul 31, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2040/25
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A base stock having at least 90 wt. % saturates, an amount and distribution of aromatics, as determined by ultra violet (UV) spectroscopy, including an absorptivity between 280 and 320 nm of less than 0.015 l/gm-cm, a viscosity index (VI) from 80 to 120, and having a cycloparaffin performance ratio greater than 1.05 and a kinematic viscosity at 100° C. between 4 and 6 cSt. A base stock having at least 90 wt. % saturates, an amount and distribution of aromatics, as determined by UV spectroscopy, including an absorptivity between 280 and 320 nm of less than 0.020 l/gm-cm, a viscosity index (VI) from 80 to 120, and having a cycloparaffin performance ratio greater than 1.05 and a kinematic viscosity at 100° C. between 10 and 14 cSt. A lubricating oil having the base stock as a major component, and one or more additives as a minor component. Methods for improving oxidation performance and low temperature performance of formulated lubricant compositions through the compositionally advantaged base stock.