Abstract: The present application is directed to detergent base products and processes for forming the detergent base products. One embodiment of the process comprises forming a bis-Mannich intermediate compound by reacting (i) at least one hydroxyl substituted aromatic ring compound having on the ring an aliphatic hydrocarbyl substituent derived from a polyolefin having a number average molecular weight of about 500 to about 3000; (ii) at least one primary amine; and (iii) at least one aldehyde. The resulting bis-Mannich intermediate compound is then reacted with at least one second amine compound chosen from primary and secondary amines to form the detergent base product.

Abstract: A diesel fuel composition having a mixture of a major portion of a hydrocarbon-based compression ignition fuel; and a minor portion of an additive having a polyalkylene succinimide dispersant, the dispersant being the reaction product of at least one amine and at least one polyalkylene succinic anhydride of formula I, wherein R1 is a polyalkenyl radical having a number average molecular weight ranging from about 600 to about 850.

Abstract: New, highly effective Mannich detergents for use in hydrocarbon fuels are described which reduce engine deposits in spark and compression ignition internal combustion engines. They are Mannich condensation reaction products obtained from reacting: (i) a polyamine having a sterically-hindered primary amino group, (ii) a hydrocarbyl-substituted hydroxyaromatic compound, and (iii) an aldehyde. These Mannich detergent compounds may be dispersed in a liquid carrier to provide a fuel additive concentrate for hydrocarbon engine fuels which effectively control engine deposit formation in intake valves and also other engine regions such as port fuel injectors and combustion chambers.

Abstract: The present teachings relate to fuel additives useful for reducing and/or preventing the formation of intake valve deposits. The fuel additives include cyclic Mannich products prepared by the reaction of (A) a substituted hydroxyaromatic compound, (B) a formaldehyde source, and (C) a primary amine.

Abstract: This application relates to fuel additive compositions and fuel compositions comprising an amine prepared from nitriles and phenolic compounds. Suitable nitrites include optionally substituted acrylonitrile, and suitable phenolic compounds include polyisobutylphenols and polyisobutyl cresols. The application also relates to methods for reducing intake valve deposits in engines.

Abstract: An improved process for preparing a Mannich product employs an intermediate or pre-formed triazine. The product is useful as a detergent in fuel compositions. The fuel compositions containing the Mannich product are useful for controlling intake valve deposits in engines.