US 12,454,653 B2
Gasoline additive composition for improved engine performance
Janice Jianzhao Wang, Glen Allen, VA (US); and Andre Williams, Richmond, VA (US)
Assigned to Afton Chemical Corporation, Richmond, VA (US)
Filed by Afton Chemical Corporation, Richmond, VA (US)
Filed on Dec. 11, 2023, as Appl. No. 18/535,219.
Prior Publication US 2025/0188377 A1, Jun. 12, 2025
Int. Cl. C10L 10/18 (2006.01); C10L 1/2383 (2006.01)
CPC C10L 1/2383 (2013.01) [C10L 10/18 (2013.01); C10L 2200/0423 (2013.01)] 22 Claims
 
1. A fuel additive for a spark-ignition engine comprising:
a detergent including one or more Mannich detergent additives and one or more Mannich-based quaternary ammonium salt detergent additives;
wherein the one or more Mannich detergent additives include the reaction product of a hydrocarbyl-substituted phenol or cresol, one or more aldehydes, and one or more amines;
wherein the one or more Mannich-based quaternary ammonium salt detergent additives include (i) a Mannich reaction product or derivative thereof having at least one tertiary amino group and prepared from a hydrocarbyl-substituted phenol, cresol, or derivative thereof, an aldehyde, and a hydrocarbyl amine or polyamine providing the tertiary amino group and reacted with (ii) a quaternizing agent selected from the group consisting of a carboxylic or polycarboxylic acid, ester, amide, or salt thereof or halogen substituted derivative thereof; and
wherein about 2 to about 50 weight percent of the detergent is the one or more Mannich-based quaternary ammonium salt detergent additives.