The present invention relates to a low-temperature additive for fuel oils having a sulfur content of less than 50 ppm, comprising i) at least one oil-soluble amide-ammonium salt of a polycarboxylic acid with a mono- and/or dialkylamine (A) and ii) 5-100% by weight, based on the amount of amide-ammonium salt (A), of an oil-soluble amine (B), and iii) 0.1 to 10 parts by weight, based on the amount of amide-ammonium salt (A), of a resin formed from at least one aromatic compound bearing an alkyl radical and an aldehyde and/or ketone (D).

The present technology is related to amide or ester containing quaternary ammonium salts having a hydrocarbyl substituent of number average molecular weight ranging from 300 to 750, and the use of such quaternary ammonium salts in fuel compositions to improve the water shedding performance of the fuel composition.

The present technology is related to amide or ester containing quaternary ammonium salts having a hydrocarbyl substituent of number average molecular weight ranging from 300 to 750, and the use of such quaternary ammonium salts in fuel compositions to improve the water shedding performance of the fuel composition.

Provided is a composition comprising at least one polymer, the repeat unit of which comprises at least one amide functional group, at least one polyetheramine with a weight-average molecular weight (M.sub.w) of greater than 100 g.mo1.sup.−1 and exhibiting at least two secondary and/or tertiary amine functional groups, and optionally, but preferably, at least one organic solvent. Also provided is method of using of the composition for delaying, indeed even preventing, the formation of gas hydrates, in particular in a process for extracting oil and/or gas and/or condensates, and also to the process for delaying, indeed even preventing, the formation and/or the agglomeration of gas hydrates, employing a composition as defined above.

The present invention relates to performance enhancing additive composition comprising a mixture or a blend of (i) an acid amide; and (ii) oxide treated derivative of amine in one embodiment, and performance enhancing additive composition comprising a mixture or a blend of (i) an acid amide; and (ii) oxide treated derivative of amine, and further comprising a detergent in another embodiment, and to a fuel compositions thereof in still another embodiment, and to method of use thereof in yet another embodiment, and to a method of improving performance of a fuel and an engine in yet another embodiment.

The present invention relates to performance enhancing additive composition comprising a mixture or a blend of (i) an acid amide; and (ii) oxide treated derivative of amine in one embodiment, and performance enhancing additive composition comprising a mixture or a blend of (i) an acid amide; and (ii) oxide treated derivative of amine, and further comprising a detergent in another embodiment, and to a fuel compositions thereof in still another embodiment, and to method of use thereof in yet another embodiment, and to a method of improving performance of a fuel and an engine in yet another embodiment.

A method of treating petroleum fluids may include adding a flow improver composition to the petroleum fluids, the flow improver composition, comprising: a solvent; and a dendrimer-based flow improver, wherein at least a portion of the surface sites of the dendrimer are chemically modified with saturated and unsaturated fatty acids.

A method of treating petroleum fluids may include adding a flow improver composition to the petroleum fluids, the flow improver composition, comprising: a solvent; and a dendrimer-based flow improver, wherein at least a portion of the surface sites of the dendrimer are chemically modified with saturated and unsaturated fatty acids.

The present disclosure relates to methods and fuel compositions for reducing or eliminating fuel injector deposits in high pressure gasoline engines. The fuel compositions include gasoline and a synergistic combination of a fuel injector clean-up mixture including a heterocyclic amine, diamine, or open chain derivative thereof and a hydrocarbyl substituted dicarboxylic anhydride derivative selected from a diamide, acid/amide, acid/ester, diacid, amide/ester, diester, and imide.

The present invention relates to the use of a fuel composition comprising at least 85% by weight of one or more hydrocarbon fractions consisting of one or more hydrotreated vegetable oils, said fraction(s) having a distillation range between 100 and 400° C. and having a paraffin content greater than or equal to 90% by weight, for reducing the deposits present in the internal parts of a compression ignition engine (or diesel engine). The present invention also relates to a method for cleaning the deposits present in the internal parts of a compression ignition engine using such a composition.