| 摘要 |
Abstract A diesel fuel composition comprising a performance enhancing additive, wherein the performance enhancing additive is the 5 product of a Mannich reaction between: (a) an aldehyde; (b) a polyamine; and (c) an optionally phenol ; wherein the polyamine component (b) includes the moiety .0 R1R2NCHR3CHR 4NR5 R6 wherein each of R1 , R2 R3, R4, R5 and R6 is independently selected from hydrogen, and an optionally substituted alkyl, alkenyl, alkynyl, aryl, alkylaryl or arylalkyl substituent; and wherein the diesel fuel composition includes an additive comprising a quaternary ammonium salt .5 which comprises the reaction product of (a) a hydrocarbyl substituted acylating agent and a compound having an oxygen or nitrogen atom capable of condensing with said acylating agent and further having a tertiary amino group; and (b) a quaternizing agent suitable for converting the tertiary amino .0 group to a quaternary nitrogen wherein the quaternizing agent is selected from the group consisting of dialkyl sulphates, benzyl halides, hydrocarbyl substituted carbonates; hydrocarbyl epoxides in combination with an acid or mixtures thereof. |
