Synthetic isoparaffinic premium heavy lubricant base stock

US6846778B2 · kind B2 · utility

Assignee

• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US

Inventors

• Jack W. Johnson · Clinton, US
• Adeana Richelle Bishop · Baton Rouge, US
• William Berlin Genetti · Salem, US
• Loren Ansell · Baton Rouge, US
• Rocco A. Fiato · Scotch Plains, US

Key dates

• Filing date: Oct 8, 2002
• Grant date: Jan 25, 2005
• Expiry date: Jul 4, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2020/071
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A synthetic, isoparaffinic heavy hydrocarbon composition useful as a heavy lubricant base stock contains hydrocarbon molecules having consecutive numbers of carbon atoms, is a liquid at 100° C., at which temperature its kinematic viscosity is above 8 cSt and has respective initial and end boiling points of at least 850 and 1000° F. (454 and 538° C.). The branching index BI and the branching proximity CH2>4 of the isoparaffinic hydrocarbon molecules, are such that:BI−0.5(CH2>4)<15; and  (a)BI+0.85(CH2>4)<45;  (b)as measured over the hydrocarbon composition as a whole.