An additive composition improves the stability and the engine performances of gas oils, including gas oils of the non-road type in compliance with the decree of 10 Dec. 2010. The additive composition includes: at least one metal deactivator or chelating agent, at least one antioxidant of the hindered phenol type (alkylphenol), at least one dispersant and/or detergent, and at least one metal passivator, wherein the composition includes improved properties, in particular relative to the oxidation resistance, storage stability, thermal stability, reduction in fouling of the injectors, reduction in loss of power, reduction in the tendency of filters to clog.

A fuel stabilizer formulation includes a hybrid component that acts as an antioxidant, a chelating agent, and lubricant when added to the fuel, one or more vapor suppressants, and a water scavenger. Furthermore, the formulation may include components that bond with gasoline compounds to prevent evaporation of low-end components, form a layer along with the engine metal that prevents condensed water from corroding the metal, prevent corroded metal ions from destabilizing gasoline compounds into resin, and scavenge water to prevent water deposits at the bottom of the tank which limits biological activity, resulting in an overall improvement in oxidation stability over conventional fuel stabilizers.

The present invention relates to the use of a composition of additives for reducing emissions of nitrogen oxides and of at least one type of pollutant selected from carbon monoxide and hydrocarbons which are unburnt during the combustion of a liquid fuel in a compression-ignition internal combustion engine, said composition comprising: (i) one or more additive(s) selected from compounds having at least one alkylphenol group in their structure; and (ii) one or more additives which improve the cetane number, selected from alkyl nitrates, aryl peroxides and alkyl peroxides; wherein the weight ratio of the amount of additive(s) (i) to the amount of additive(s) (ii) is within the range from 1:3 to 3:1. The present invention also relates to a method for reducing emissions of nitrogen oxides and of at least one type of pollutant selected from carbon monoxide and hydrocarbons which are unburnt during the combustion of a liquid fuel in a compression-ignition internal combustion engine which employs this composition of additives.

The present invention relates to the use of a composition of additives for reducing emissions of nitrogen oxides and of at least one type of pollutant selected from carbon monoxide and hydrocarbons which are unburnt during the combustion of a liquid fuel in a compression-ignition internal combustion engine, said composition comprising: (i) one or more additive(s) selected from compounds having at least one alkylphenol group in their structure; and (ii) one or more additives which improve the cetane number, selected from alkyl nitrates, aryl peroxides and alkyl peroxides; wherein the weight ratio of the amount of additive(s) (i) to the amount of additive(s) (ii) is within the range from 1:3 to 3:1. The present invention also relates to a method for reducing emissions of nitrogen oxides and of at least one type of pollutant selected from carbon monoxide and hydrocarbons which are unburnt during the combustion of a liquid fuel in a compression-ignition internal combustion engine which employs this composition of additives.

A fuel additive for fuel formulations comprising calcium sulfonates in an amount effective to limit or eliminate valve seat recession in engines utilizing such fuel formulations. The fuel additive may also include a detergent, particularly in an amount to enhance the VSR limiting effect of the calcium sulfonates. Also included are fuel formulations containing calcium sulfonates in a concentration effective to limit vale seat recession in engines utilizing the fuel formulations. Methods for treating VSR in piston engines are also provided.

The invention relates to butanol compositions for fuel blending and fuel blends comprising such compositions. The compositions and fuel blends of the invention have desirable performance characteristics and can serve as alternatives to ethanol-containing fuel blends. The invention also relates to methods for producing such butanol compositions and fuel blends.

The present disclosure relates to a composition for corrosion inhibition in a fuel mixture. The present disclosure also relates to a method for preparing a composition for corrosion inhibition in a fuel mixture. The corrosion inhibitor of the present invention delivered excellent corrosion resistance, minimum dosage levels & good stability and miscibility which can be used for mitigating corrosion issues in neat Ethanol and Gasohol.

A fuel composition is described. The composition contains a hydrocarbon-based fuel boiling in the gasoline or diesel range; a carrier fluid comprising an alkyl polyethoxylate having the following structure:

##STR00001##

where each R.sup.2 and R.sup.3 is independently hydrogen, C.sub.1-C.sub.4 hydrocarbyl group, or C.sub.1-C.sub.3 alcohol, where R.sup.1 is C.sub.4-C.sub.100 hydrocarbyl group, carboxyl group, ether group, thioether group, or aromatic group, wherein x is from 1 to 20, or a hydrocarbyl phenol having the following structure

##STR00002##

wherein R is a hydrocarbyl group from C.sub.4-C.sub.100; an amine-based detergent given by formula 2, R.sup.4O(CH.sub.2).sub.yNHR.sup.5, where the amine-based detergent is present in about 10 ppm to about 750 ppm by weight based on total weight of the fuel composition; where R.sup.4 is a hydrocarbyl group having 8 to 20 carbons, R.sup.5 is hydrogen or (CH.sub.2).sub.zNH.sub.2 moiety, and where y, z are independently integers having a value of 2 or greater; and one or more nitrogen-containing detergent.

A compound having formula (I) ##STR00001##
wherein R.sup.1 and R.sup.2 independently represent C.sub.1-C.sub.6 alkyl; R.sup.3 is C.sub.1-C.sub.6 alkyl; R.sup.4 is C.sub.1-C.sub.18 alkyl or C.sub.4-C.sub.18 heteroalkyl; m is zero, one, two or three; n is one, two or three; and j, k, p, q, r and s independently are zero, one or two; provided that at least one of j, k, p, q, r and s is not zero.

A compound having formula (I) ##STR00001##
wherein R.sup.1 and R.sup.2 independently represent C.sub.1-C.sub.6 alkyl; R.sup.3 is C.sub.1-C.sub.6 alkyl; R.sup.4 is C.sub.1-C.sub.18 alkyl or C.sub.4-C.sub.18 heteroalkyl; m is zero, one, two or three; n is one, two or three; and j, k, p, q, r and s independently are zero, one or two; provided that at least one of j, k, p, q, r and s is not zero.