Overbased materials in ester media

USH1536H · kind H · statutory invention registration

Assignee

• The Lubrizol Corporation · US

Inventors

• Jack L. Karn · Richmond Heights, US
• Jody A. Kocsis · Chagrin Falls, US
• Willis P. Nichols · Cleveland, US

Key dates

• Grant date: Jun 4, 1996

Classification

• Technology area (CPC —): General

Abstract

An overbased material is prepared in a liquid ester medium which is subject to saponification upon exposure to strong base, by preparing a mixture of an acidic material having at least about 8 carbon atoms in a volatile oleophilic medium which is substantially inert to base; adding to the mixture a stoichiometric excess of a metal base; adding to the mixture a gaseous acidic material under conditions to react with substantially all of the stoichiometric excess of the metal base; and adding the liquid ester medium to the resulting material.