Low temperature performance lubricating oil detergents and method of making the same

US8993499B2 · kind B2 · utility

Assignees

• CHEVRON ORONITE COMPANY LLC · US
• Chevron Oronite SAS · FR

Inventors

• Curt B. Campbell · Hercules, US
• Gilles P. Sinquin · Montivilliers, FR
• Eugene E. Spala · Fairfield, US
• Gilbert R. Chapon · Montivilliers, FR

Key dates

• Filing date: Dec 19, 2008
• Grant date: Mar 31, 2015
• Expiry date: Apr 2, 2031

Classification

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

Abstract

A carboxylate detergent prepared by the process comprising (a) alkylating a hydroxyaromatic compound with at least one normal alpha olefin having from about 12 to about 30 carbon atoms per molecule that has been isomerized to obtain an isomerized alpha olefin having 15-98 wt % branching and a residual alpha olefin content of between from about 0.1 to about 30 wt %, thereby producing an alkylated hydroxyaromatic compound; (b) neutralizing the resulting alkylated hydroxyaromatic compound with an alkali metal base; (c) carbonating the alkali metal salt from step (b) with carbon dioxide; (d) acidifying the salt produced in step (c); and (e) overbasing the resulting alkylated hydroxyaromatic carboxylic acid.