Fuel compositions

US5697988A · kind A · utility

Assignee

• Ethyl Corporation · US

Inventors

• Dennis J. Malfer · Kirkwood, US
• Lawrence J. Cunningham · Kirkwood, US

Key dates

• Filing date: Jun 7, 1996
• Grant date: Dec 16, 1997
• Expiry date: Jun 7, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10L1/2633
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

This invention relates to a novel fuel additive composition which provides reduced engine deposits and control of octane requirement increase in engines. The composition comprises: PA0 a) a Mannich reaction product of (i) a high molecular weight alkyl-substituted phenol, (ii) amine, and (iii) aldehyde wherein the ratio of (i) to (ii) to (iii) in the reaction is within the range of from 1.0:0.1-10:0.1-10; PA0 b) a polyoxyalkylene compound; and PA0 c) optionally, poly-.alpha.-olefin; wherein the additive composition contains from about 50 to about 90 wt. % of (a), from about 10 to about 50 wt. % of (b), and from about 0 to about 40 wt. % of (c).