Abstract: The present invention relates to a composition of additives comprising: at least one first compound selected from: (i) copolymers of ethylene and vinyl acetate having a molar mass Mn included in the range ranging from 10,000 to 60,000 g·mol?1, optionally grafted by at least one alkyl (meth)acrylate group, the alkyl chain of which is saturated and contains from 12 to 30 carbon atoms; and (ii) polymers comprising at least 90 mol % of units derived from alkyl. (meth)acrylate monomer, the alkyl chain of which is saturated and contains from 18 to 22 carbon atoms; and at least one second compound selected from the modified alkylphenol-aldehyde resins. The invention also relates to the use of this composition of additives for lowering the viscosity of a liquid petroleum product such as a crude oil and for reducing the deposition of paraffins.

Abstract: The present invention relates to a compound of formula (I): wherein R is a radical selected from a linear, branched or cyclic hydrocarbyl group optionally comprising one or more heteroatoms, such as oxygen, sulfur, halogen, silicon, nitrogen atoms, and its use as a hydrogen sulphide and/or mercaptans scavenger in hydrocarbon compositions and in water-based compositions such as water-based drilling fluids.

Abstract: A composition includes (a) a hydrocarbon fluid comprising less than 1000 ppm by weight of aromatics, a weight ratio normal paraffins/isoparaffins ranging from 0.2 to 1.0 and having an initial boiling point and a final boiling point in the range from 265° C. to 380° C., and (b) a copolymer derived from alpha-olefin monomers and vinyl acetate type monomers and optionally acrylate type monomers.

Abstract: The present invention relates to an aqueous composition comprising: —at least one reducing agent for nitrogen oxides and/or at least one precursor of such an agent, —at least one surfactant, and —at least one antifoaming additive chosen from copolymers comprising a polydimethylsiloxane backbone with a mean number of dimethylsiloxane units within the range of from 150 to 300, grafted by polyoxyalkylene chains. The present invention also relates to the use of such a composition for the treatment of exhaust gases at the outlet of internal combustion engines, and also to a method for treating the exhaust gases originating from an internal combustion engine using this composition.

Abstract: The present invention relates to a composition for scavenging hydrogen sulphide and/or mercaptans in hydrocarbon streams, the composition comprising an oxazolidine compound and a synergistic additive.

Abstract: The present invention relates to a composition for scavenging hydrogen sulphide and/or mercaptans in hydrocarbon streams, the composition comprising an oxazolidine compound and a synergistic additive.

Abstract: The present invention relates to a composition for scavenging hydrogen sulphide and/or mercaptans in hydrocarbon streams, the composition comprising an oxazolidine compound and a synergistic additive.

Abstract: The present invention relates to a composition of additives comprising: at least one first compound selected from: (i) copolymers of ethylene and vinyl acetate having a molar mass Mn included in the range ranging from 10,000 to 60,000 g·mol?1, optionally grafted by at least one alkyl (meth)acrylate group, the alkyl chain of which is saturated and contains from 12 to 30 carbon atoms; and (ii) polymers comprising at least 90 mol % of units derived from alkyl. (meth)acrylate monomer, the alkyl chain of which is saturated and contains from 18 to 22 carbon atoms; and at least one second compound selected from the modified alkylphenol-aldehyde resins. The invention also relates to the use of this composition of additives for lowering the viscosity of a liquid petroleum product such as a crude oil and for reducing the deposition of paraffins.

Abstract: The present invention relates to a composition for scavenging hydrogen sulphide and/or mercaptans in hydrocarbon streams, the composition comprising at least one oxazolidine compounds and at least one alkanolamine allowing boosting the effect of the oxazolidine compound.

Abstract: In a reaction product of at least one phenol compound with aldehyde(s), the phenol compound(s) reply to formula (II): wherein-R represents a hydrogen atom or a hydrocarbyl group comprising from 1 to 30 carbon atoms, -x is 1 or 2, -R1 is a linear alkyl or alkenyl group having 15 carbon atoms if x is 1, -R1 is hydrogen if x is 2, -R2 represents a hydrogen atom or a hydrocarbyl group comprising from 1 to 30 carbon atoms, and its use as a hydrogen sulphide and/or mercaptans scavenger in hydrocarbon compositions and in water-based compositions such as water-based drilling fluids.

Abstract: A composition includes (a) a hydrocarbon fluid comprising less than 1000 ppm by weight of aromatics, a weight ratio normal paraffins/isoparaffins ranging from 0.2 to 1.0 and having an initial boiling point and a final boiling point in the range from 265° C. to 380° C., and (b) a copolymer derived from alpha-olefin monomers and vinyl acetate type monomers and optionally acrylate type monomers.

Abstract: A composition for scavenging hydrogen sulphide and/or mercaptans in hydrocarbon streams includes a H2S scavenger selected from oxazolidine compounds, triazine and metal-based carboxylate compounds, and a synergistic additive allowing boosting the effect of the H2S scavenger compound.

Abstract: The present invention relates to a process for extracting a crude oil from a rock formation containing it, comprising the following steps: (i) a first step of forced injection of a modified alkylphenol-aldehyde resin into the rock formation containing a crude oil, then (ii) a second step of extracting the crude oil from the rock formation.

Abstract: The present invention relates to a composition for scavenging hydrogen sulphide and/or mercaptans in hydrocarbon streams, the composition comprising an oxazolidine compound and a synergistic additive.

Abstract: The present invention relates to a composition for scavenging hydrogen sulphide and/or mercaptans in hydrocarbon streams, the composition comprising an oxazolidine compound and a synergistic additive.

Abstract: The present invention relates to a composition for scavenging hydrogen sulphide and/or mercaptans in hydrocarbon streams, the composition comprising an oxazolidine compound and a synergistic additive.

Abstract: The present invention relates to a composition for scavenging hydrogen sulphide and/or mercaptans in hydrocarbon streams, the composition comprising an oxazolidine compound and a synergistic additive.

Abstract: The present invention relates to a composition of additives, comprising: at least one copolymer having at least one motif of formula (I) and at least one motif of formula (II); at least one cold-flow improver selected from the copolymers of ethylene and unsaturated ester(s); and at least one anti-settling and/or paraffin dispersant additive.

Abstract: Use of an alkylphenol-aldehyde resin modified by at least one alkylamine in a composition of crude oils or in a product derived from a composition of crude oils as dispersing additive for asphaltenes. Process for the treatment of a composition of crude oils or a derived product which makes it possible to prevent the precipitation of asphaltenes, in particular in crude oils and the products which result therefrom by refining and/or extraction processes. Bituminous compositions including an alkylphenol-aldehyde resin modified by at least one alkylamine.

Abstract: 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.