New additive compositions for improving the lubricating power of low sulfur petrol, diesel and jet fuels

摘要

New additive formulations which restore the lubricating properties of motor fuels depleted of sulfur and aromatics. New oiliness additives for motor fuels, particularly those of a S content lower than 500 ppm, which mainly comprises 5 - 95% of a glycerol monoester IA or IB; R1-(CO)-O-CH2CHOH-CH2OH (IA); R1-(CO)-O-CH(CH2OH)2 (IB); R1 = linear 8 - 24C alkyl or 8 - 60C cyclic or polycyclic; and 5 - 95% of a compound(II); R2-(CO)-X(II) R2 = R1; X = OR0 (R0 is 1 - 8C alkyl optionally substituted by hydroxyl and/or ester) or primary or secondary amines, alkanolamines and/or 1 - 18C polyamines. Independent claims are also included for the preparation of the additives and fuel compositions containing the additives.