Lubricating compositions

US9234151B2 · kind B2 · utility

Assignee

• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US

Inventors

• Richard Wayne Martin · Teaneck, US
• Douglas E. Deckman · Mullica Hill, US
• Kevin J. Kelly · Mullica Hill, US
• Craig J. Emett · Houston, US
• Mark P. Hagemeister · Houston, US
• Bruce A. Harrington · Houston, US
• Chon-Yie Lin · Houston, US
• Phillip T. Matsunaga · Houston, US
• Charles J. Ruff · Houston, US
• Kevin B. Stavens · Seabrook, US

Key dates

• Filing date: Sep 12, 2012
• Grant date: Jan 12, 2016
• Expiry date: Jun 7, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2070/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

This invention is directed to lubricating compositions comprising a first base oil component consisting of a polyalphaolefin base stock or combination of polyalphaolefin base stocks, each having a kinematic viscosity at 100° C. of from 3.2 cSt to 3.8 cSt and obtained by a process comprising: (a) contacting a catalyst, an activator, and a monomer in a first reactor to obtain a first reactor effluent, the effluent comprising a dimer product, a trimer product, and optionally a higher oligomer product, (b) feeding at least a portion of the dimer product to a second reactor, (c) contacting said dimer product with a second catalyst, a second activator, and optionally a second monomer in the second reactor, (d) obtaining a second reactor effluent, the effluent comprising at least a trimer product, and (e) hydrogenating at least the trimer product of the second reactor effluent.