Patent ID: 7744661

Claim:
A fuel composition comprising a major amount of hydrocarbons boiling in the gasoline or diesel range and an extracted alkylene oxide-adducted hydrocarbyl amide reaction product comprising an alkylene oxide-adducted hydrocarbyl amide having from about 3 to 50 moles of alkylene oxide per mole of hydrocarbyl amide, a mixture of mono- and di-ester products, and amine by-products, wherein the extracted reaction product is prepared by (a) first reacting a fatty acid or fatty acid lower alkyl ester with ammonia or a mono- or di-hydroxy hydrocarbyl amine and (b) subsequently reacting the resulting intermediate with an alkylene oxide to provide an alkylene oxide-adducted hydrocarbyl amide reaction product, wherein the alkylene oxide-adducted hydrocarbyl amide reaction product obtained in step (b) is washed with an extractant to provide an extracted alkylene oxide-adducted hydrocarbyl amide reaction product and wherein the amount of amine by-products in the extracted reaction product is less than 4 wt %, based on the total weight of the extracted alkylene oxide-adducted hydrocarbyl amide reaction product, and the amide:ester ratio in the extracted reaction product is in the range of from about 0.1:1 to 1.1:1, and further comprising one or more fuel additives for hydrocarbon-based fuels.