Abstract: The present invention describes a fluid which is suitable for the decontamination of heat engines which can carry out both the catalytic reduction of oxides of nitrogen (NOx) contained in exhaust gases and assist in the regeneration of the particulate filter (PF), said fluid being in the form of a stable suspension of colloidal particles, these colloidal particles being dispersed in an aqueous solution containing at least one reducing agent or at least one precursor of a reducing agent for NOx. The invention also describes several embodiments for the preparation of said fluid.

Abstract: The present invention concerns a process for developing a subterranean formation, in which at least one fluid is injected. In accordance with the invention, the fluid comprises at least one additive, the additive being labelled with at least one luminescent semiconductor nanocrystal (fluorescent or phosphorescent). In this manner, and by optical analysis of the presence of luminescent semiconductor nanocrystal in the fluid recovered from the subterranean formation, the presence and/or quantity of additive in the recovered fluid can be determined. Given that the semiconductor nanocrystal is either phosphorescent or fluorescent, the additive is rendered readily detectable and quantitatively determinable in the fluids recovered from the subterranean formation.

Abstract: The present invention concerns a system for measuring the quantity of fluorescent semiconductor nanocrystals present in a fluid. The system in accordance with the invention comprises a fluid circulation device (1), a light source (2) and a fluorescence detector (3) for the semiconductor nanocrystals (4).

Abstract: The present invention describes a fluid which is suitable for the decontamination of heat engines which can carry out both the catalytic reduction of oxides of nitrogen (NOx) contained in exhaust gases and assist in the regeneration of the particulate filter (PF), said fluid being in the form of a stable suspension of colloidal particles, these colloidal particles being dispersed in an aqueous solution containing at least one reducing agent or at least one precursor of a reducing agent for NOx. The invention also describes several embodiments for the preparation of said fluid.

Abstract: The present invention concerns a system for measuring the quantity of fluorescent semiconductor nanocrystals present in a fluid. The system in accordance with the invention comprises a fluid circulation device (1), a light source (2) and a fluorescence detector (3) for the semiconductor nanocrystals (4).

Abstract: The present invention concerns a process for developing a subterranean formation, in which at least one fluid is injected. In accordance with the invention, the fluid comprises at least one additive, the additive being labelled with at least one luminescent semiconductor nanocrystal (fluorescent or phosphorescent). In this manner, and by optical analysis of the presence of luminescent semiconductor nanocrystal in the fluid recovered from the subterranean formation, the presence and/or quantity of additive in the recovered fluid can be determined. Given that the semiconductor nanocrystal is either phosphorescent or fluorescent, the additive is rendered readily detectable and quantitatively determinable in the fluids recovered from the subterranean formation.

Abstract: The invention concerns a novel material comprising at least one zeolite shaped with a binder formulation comprising at least one hydraulic binder. The invention also concerns a process for the preparation of said material, comprising at least one step for mixing at least one powder of at least one zeolite with at least one powder of at least one hydraulic binder and at least one solvent, and a step for shaping the mixture obtained from the mixing step, preferably by pelletization or by extrusion.

Abstract: A material is described in the form of a millimetric article constituted by coarse alumina particles with a median diameter in the range 10 to 200 ?m, said coarse particles being at a distance, from one interface to another, of less than 10 ?m, fine alumina particles with a median diameter in the range 0.5 to 10 ?m, said fine particles being at a distance, from one interface to another, of less than 5 ?m and being located in the space between the coarse particles, and a binder constituted by aluminium phosphate, said binder being located in the space between said fine and coarse particles, said material having a mesoporous volume, measured by mercury porosimetry, in the range 0.2 to 2 mL/g, a macroporous volume, measured by mercury porosimetry, in the range 0.05 to 0.2 mL/g and a BET specific surface area in the range 80 to 350 m2/g.

Abstract: The invention relates to a process for preparing a novel material comprising at least one crystalline organic-inorganic hybrid material (MHOIC) formed with a binding formulation comprising at least one hydraulic binder, said process comprising at least one step of mixing at least one powder of at least one crystalline organic-inorganic hybrid material with at least one powder of at least one hydraulic binder in the absence of solvent, followed by a step of forming, preferably by pelletizing in the absence of solvent or by granulation, the mixture obtained at the end of the mixing step.

Abstract: The invention relates to a novel material comprising at least one crystalline organic-inorganic hybrid material (MHOIC) formed with a binding formulation comprising at least one hydraulic binder. The invention also relates to a process for preparing said material, comprising at least one step of mixing at least one powder of at least one crystalline organic-inorganic hybrid material with at least one powder of at least one hydraulic binder and at least one solvent, and a step of forming, preferably by pelletizing or extruding, the mixture obtained at the end of the mixing step.

Abstract: A material is described in the form of a millimetric article constituted by coarse alumina particles with a median diameter in the range 10 to 200 ?m, said coarse particles being at a distance, from one interface to another, of less than 10 ?m, fine alumina particles with a median diameter in the range 0.5 to 10 ?m, said fine particles being at a distance, from one interface to another, of less than 5 ?m and being located in the space between the coarse particles, and a binder constituted by aluminium phosphate, said binder being located in the space between said fine and coarse particles, said material having a mesoporous volume, measured by mercury porosimetry, in the range 0.2 to 2 mL/g, a macroporous volume, measured by mercury porosimetry, in the range 0.05 to 0.2 mL/g and a BET specific surface area in the range 80 to 350 m2/g.

Abstract: Method of treating the area surrounding an acid gas storage well (1) using a reactive solution, wherein the following stages are carried out: a) injecting from the well a wash fluid for washing the rock of said surrounding area so that it no longer contains products reactive with said solution, b) injecting into the rock thus washed a predetermined volume of reactive solution suited to react with acid gases.

Abstract: The invention relates to a cementing material, to a production method and to a cement slurry comprising polymer particles coated with at least one powdered mineral additive.

Abstract: The present invention relates to a formulation of a high-performance foamed cement material, comprising: at least one hydraulic binder, microparticles whose grain size ranges between 0.1 and 30 ?m, whose proportion ranges between 15% and 50% by mass in relation to the mass of hydraulic binder, mineral particles whose grain size ranges between 1 and 500 ?m, whose proportion ranges between 10% and 35% by mass in relation to the mass of hydraulic binder, the proportion of particles being lower than the proportion of microparticles, a hydrosoluble polymer thinning agent whose proportion ranges between 0.1% and 8% by mass in relation to the mass of hydraulic binder, water whose proportion is at most 40% by mass in relation to the mass of hydraulic binder, a foaming agent whose proportion ranges between 0.1% and 10% by mass in relation to the mass of hydraulic binder.

Abstract: The present invention relates to a formulation of a high-performance foamed cement material, comprising: at least one hydraulic binder, microparticles whose grain size ranges between 0.1 and 30 ?m, whose proportion ranges between 15 % and 50 % by mass in relation to the mass of hydraulic binder, mineral particles whose grain size ranges between 1 and 500 ?m, whose proportion ranges between 10 % and 35 % by mass in relation to the mass of hydraulic binder, the proportion of particles being lower than the proportion of microparticles, a hydrosoluble polymer thinning agent whose proportion ranges between 0.1 % and 8 % by mass in relation to the mass of hydraulic binder, water whose proportion is at most 40 % by mass in relation to the mass of hydraulic binder, a foaming agent whose proportion ranges between 0.1 % and 10 % by mass in relation to the mass of hydraulic binder.

Abstract: The invention relates to a high-performance cement comprising an alumnic cement with an aluminium content of at least more than 30%; microsilica with a grain size of 0.1 - 20 ?m whereby the percentage thereof is 35 % less by weight in comparison with the weight of the cement; mineral particles with a grain size of 0.5 - 500 ?m whereby the percentage thereof is 35% less by weight in comparison with the weight of the cement, the percentage of said particles being less than that of the microsilica; a water-soluble polymer fluidifying agent whereby the percentage thereof is 0.2 to 3.0% in comparison with the weight of the cement; a retarding agent which is used to control the setting time of the slurry; an amount of water the maximum thereof corresponding to 40 % in relation to the cement.

Abstract: The present invention relates to a formulation of a foamed cement slurry comprising in combination: at least one hydraulic binder from the group consisting of class G Portland cements, class H Portland cements, aluminous cements whose alumina content is at least above 30% by mass, sulfoaluminous cements and plasters, water whose proportion ranges between 20% and 60% by mass in relation to the mass of hydraulic binder, a foaming agent whose proportion ranges between 1% and 20% by mass in relation to the mass of hydraulic binder, the foaming agent being a hydrosoluble polymer comprising hydrophobic links, or a mixture of such polymers.

Abstract: The invention relates to a high-performance cement comprising an alumnic cement with an aluminium content of at least more than 30%; microsilica with a grain size of 0.1-20 ?m whereby the percentage thereof is 35% less by weight in comparison with the weight of the cement; mineral particles with a grain size of 0.5-500 ?m whereby the percentage thereof is 35% less by weight in comparison with the weight of the cement, the percentage of said particles being less than that of the microsilica; a water-soluble polymer fluidifying agent whereby the percentage thereof is 0.2 3.0% in comparison with the weight of the cement; a retarding agent which is used to control the setting time of the slurry; an amount of water the maximum thereof corresponding to 40% in relation to the cement.

Abstract: The present invention relates to a formulation of a foamed cement slurry comprising in combination: at least one hydraulic binder from the group consisting of class G Portland cements, class H Portland cements, aluminous cements whose alumina content is at least above 30% by mass, sulfoaluminous cements and plasters, water whose proportion ranges between 20% and 60% by mass in relation to the mass of hydraulic binder, a foaming agent whose proportion ranges between 1% and 20% by mass in relation to the mass of hydraulic binder, the foaming agent being a hydrosoluble polymer comprising hydrophobic links, or a mixture of such polymers.

Abstract: The present invention relates to a formulation of a high-performance foamed cement material, comprising: at least one hydraulic binder, microparticles whose grain size ranges between 0.1 and 30 ?m, whose proportion ranges between 15% and 50% by mass in relation to the mass of hydraulic binder, mineral particles whose grain size ranges between 1 and 500 ?m, whose proportion ranges between 10% and 35% by mass in relation to the mass of hydraulic binder, the proportion of particles being lower than the proportion of microparticles, a hydrosoluble polymer thinning agent whose proportion ranges between 0.1% and 8% by mass in relation to the mass of hydraulic binder, water whose proportion is at most 40% by mass in relation to the mass of hydraulic binder, a foaming agent whose proportion ranges between 0.1% and 10% by mass in relation to the mass of hydraulic binder.