Abstract: The present invention relates to the use, for improving the detergency properties of a liquid fuel composition comprising one or more detergent additives, of an additive consisting of one or more hydrocarbon compound(s) comprising from 2 to 10 carbon atoms and two hydroxyl functions. The present invention also relates to a method for improving the cleanliness of and/or for cleaning at least one inner portion of an internal combustion engine supplied with a liquid fuel comprising one or more detergent additives, wherein such a hydrocarbon compound is added to the fuel composition.

Abstract: The object of the present invention is a fuel composition comprising: (i) from 50 to 79% by mass of a mixture of hydrocarbons comprising: a) from 35 to 55% by mass of aromatic compounds; b) from 30 to 50% by mass of non-cyclic paraffins containing at least 5 carbon atoms; and c) from 5 to 15% by mass of naphthenes; (ii) from 20 to 40% by mass of one or more ethers; and (iii) from 1 to 10% by mass of butane. This composition is useful for supplying a controlled-ignition engine, in automobile vehicles intended for general-public applications or for competition.

Abstract: The object of the present invention is a fuel composition comprising: (i) from 50 to 79% by mass of a mixture of hydrocarbons comprising: a) from 35 to 55% by mass of aromatic compounds; b) from 30 to 50% by mass of non-cyclic paraffins containing at least 5 carbon atoms; and c) from 5 to 15% by mass of naphthenes; (ii) from 20 to 40% by mass of one or more ethers; and (iii) from 1 to 10% by mass of butane. This composition is useful for supplying a controlled-ignition engine, in automobile vehicles intended for general-public applications or for competition.

Abstract: 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.

Abstract: The subject matter of the present invention is a fuel composition which comprises —at least 85% by weight of one or more fractions of hydrocarbons having a distillation range within the range extending from 100 to 400° C. and having a paraffin content greater than or equal to 90% by weight; —at least a first additive consisting of a particular quaternary ammonium salt; and —at least a second additive consisting of a phenolic antioxidant. The subject matter of the invention is also the use of a composition of additives comprising said first and second additives, for improving at least one property of a paraffin-rich fuel composition.

Abstract: Biodegradable additive concentrate with pour point according to standard ASTM D 97 below ?5° C., improving the lubricity of water-based muds, comprising at least one compound selected from the group consisting of: the diglycerol mono- and diesters, the acids and the ester derivatives of monocarboxylic fatty acids comprising from 16 to 22 carbon atoms per chain, the acids and the ester derivatives of resin acids, the monoesters of polyol comprising more than 4 hydroxylated groups and of carboxylic fatty acids comprising from 6 to 12 carbon atoms, saturated and unsaturated by at least one unsaturation, and the mono- and polyalkoxylated esters of saturated and unsaturated dicarboxylic acids comprising from 6 to 12 carbon atoms. The use of this concentrate in a water-based mud and the water-based mud containing said concentrate that can be used for drilling.

Abstract: Biodegradable additive concentrate with pour point according to standard ASTM D 97 below ?5° C., improving the lubricity of water-based muds, comprising at least one compound selected from the group consisting of: the diglycerol mono- and diesters, the acids and the ester derivatives of monocarboxylic fatty acids comprising from 16 to 22 carbon atoms per chain, the acids and the ester derivatives of resin acids, the monoesters of polyol comprising more than 4 hydroxylated groups and of carboxylic fatty acids comprising from 6 to 12 carbon atoms, saturated and unsaturated by at least one unsaturation, and the mono- and polyalkoxylated esters of saturated and unsaturated dicarboxylic acids comprising from 6 to 12 carbon atoms. The use of this concentrate in a water-based mud and the water-based mud containing said concentrate that can be used for drilling.