Abstract: A method for removing aromatic compounds from a hydrocarbon fluid comprises contacting the hydrocarbon fluid with a solid-phase polymeric material. The solid-phase polymeric material comprises a cross-linked polymer which contains aromatic groups. The method may be used to prevent the build-up of sludge and soot in a lubricant system in an internal combustion engine. A polymer bead comprising a solid-phase polymeric material is also provided.

Abstract: A method for removing aromatic compounds from a hydrocarbon fluid comprises contacting the hydrocarbon fluid with a solid-phase polymeric material. The solid-phase polymeric material comprises a cross-linked polymer which contains aromatic groups. The method may be used to prevent the build-up of sludge and soot in a lubricant system in an internal combustion engine. A polymer bead comprising a solid-phase polymeric material is also provided.

Abstract: A non-aqueous lubricating composition containing a major amount of an oil of lubricating viscosity and a minor amount, in the range of 0.02% to 5% by weight, of at least one compound represented by the structural formula (I): wherein R4 represents H or a C1 to C9 hydrocarbyl group or x, y and z are independently integers in the range 1 to 6; and R1, R2 and R3 each independently represent a C1 to C10 hydrocarbyl or substituted hydrocarbyl group.

Abstract: A non-aqueous lubricating composition containing a major amount of an oil of lubricating viscosity and a minor amount in the range of 0.02% to 5% by weight, of at least one compound having the structural formula (I): wherein m and n are each independently an integer in the range 1 to 6, R1 and R2 each independently represent a C1 to C10 hydrocarbyl or substituted hydrocarbyl group, and R3 represents a C10 to C26 hydrocarbyl group.

Abstract: The use as an ashless anti-wear additive in a non-aqueous lubricating composition and/or in a fuel composition, of at least one compound represented by the structural formula (I): wherein R4 represents H or a C1 to C9 hydrocarbyl group or formula (II) x, y and z are independently integers in the range 1 to 6; and R1, R2 and R3 each independently represent H or a C1 to C10 hydrocarbyl group. Also, a non-aqueous lubricating composition and a fuel composition for an internal combustion engine which comprise at least one of said compounds represented by structural formula (I).

Abstract: The use as a friction modifier in a non-aqueous lubricating composition and/or in a fuel composition, of at least one compound having the structural formula (I), wherein: m and n are independently an integer in the range 1 to 6; R1 and R2 each independently represent H or a C1 to C10 hydrocarbyl group; and R3 represents a C10 to C26 hydrocarbyl group. Also, a non-aqueous lubricating composition and a fuel composition for an internal combustion engine which comprise at least one of the compounds represented by structural formula (I).