Institut Francais Du Pe'trole

Ifp Energies Nouvelles

Rhone-poulenc Industries

Other

Rhodia Operations

Patrick Gateau

Jean-Pierre Durand

Fabrice Paille

Eric Lecolier

St&eacute;phane Joly

Bruno Delfort

Francois Dawans

Andre Sugier

Herve Adam

Daniel Binet

Bernard Chauvel

Marie Velly

Jean-François Argillier

Thierry Lac&ocirc;me

Dominique Labarre

James Wilson

Isabelle Henaut

Jean-Fran&ccedil;ois Argillier

Annie Audibert-Hayet

Thierry Lacome

Anne Sinquin

Jean-Francois Argillier

Benjamin Herzhaft

Brigitte Bazin

Roger Bregent

Claude Gatellier

Stephane Zinola

Hervé Adam

Baley: Anne-Sophie

Jean Pierre Durand

Anne Sophie Delion

Andree Plessis

V&eacute;ronique Meyer

Bruno Deflort

Yves Boscher

Jean Fran&ccedil;ois Brunelli

Annie Barbey

Loïc Barre

Stéphane Zinola

Nathalie Palazzo

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.

Fluid for purifying heat engines using stable suspensions of metal colloidal particles, and methods for preparing said fluid

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.

Process for developing a subterranean formation by injection of a fluid comprising an additive labelled with a luminescent semiconducting nanocrystal

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 (), a light source () and a fluorescence detector () for the semiconductor nanocrystals ().

System for measuring the quantity of semiconductor nanocrystals present in a fluid

The invention relates to a copolymer having: The invention also relates to a method for preparing such a copolymer, an inhibitor composition including such a copolymer, and a method for inhibiting inorganic deposits in a petroleum reservoir by means of said inhibitor composition.

Copolymer for inhibiting inorganic deposits

Heavy crude transportation optimization method wherein at least one solvent consisting of a petroleum cut is added to said crude. According to the method, the polar component &#x3b4;of the Hildebrand parameter of the solvent is increased, and the contribution of hydrogen bond &#x3b4;of the Hildebrand parameter of the solvent is controlled, by adding a predetermined amount of at least one specific additive.

Method of optimizing heavy crude pipeline transportation

Acrylic copolymers as additives for inhibiting paraffin deposit in crude oil, and compositions containing same

A new laboratory test for evaluating the tendency of a gasoline, which may contain additives, to produce deposits during running of an engine involves the following steps: a tube is placed in the injector oven of a gas chromatograph; said tube is kept at a constant temperature in a constant flow of air; the gasoline or additive-containing gasoline to be evaluated is injected through said tube; and the quantity of deposits formed is determined by weighing said tube after dismantling.

Laboratory test for assessing the tendency of a gasoline, optionally containing an additive, to cause deposits while the engine is running

Isosorbide derivatives that can be used in detergent compositions for gasoline-type fuels

Detergent compositions for gasoline-type fuels that contain polytetrahydrofuran derivatives

Tetrahydrofuran derivatives that can be used as detergent compositions for gasoline-type fuels

Hydrosoluble copolymers made of hydrophilic monomers, e.g., acrylamide, and of silane or siloxane derivative-based hydrophobic monomers, e.g., a silane or or siloxane acrylate, is obtained by micellar or heterogeneous radical copolymerization, and such copolymers can be used as rheology control agents in, e.g., a well bore.

Hydrosoluble silane or siloxane derivative-based copolymer

A process for slowing the growth and/or agglomeration of hydrates in a fluid comprising water and gases by adding at least one essentially water-soluble polyoxyalkylene glycol macromer or at least one essentially water-soluble polymer containing a single macromer or a plurality of different macromer units of polyoxyalkylene glycol or a mixture of essentially water-soluble macromers and/or polymacromers. It is also possible to both retard the formation of hydrates and to substantially slow their growth and limit their agglomeration during crystallization by combining polyoxyalkylene glycol macromer type structures with kinetic additive type structures which are known to inhibit hydrate formation.

Process for slowing the growth and/or agglomeration and possibly

A process is described for retarding or inhibiting the growth and/or aggregation of hydrates in production effluents comprising water and a gas under thermodynamic conditions in which hydrates can form, characterized in that a low concentration (0.05% to 5% by weight with respect to the water) of water-soluble copolymer containing hydrophobic groups is incorporated into the effluent.

Process for inhibiting or retarding the formation, growth and/or

An alkenyl anhydride or polyalkenylsuccinic anhydride is prepared without forming resins, by an ene-synthesis reaction between an olefin or a polyolefin and a maleic anhydride, optionally substituted by one or two methyl groups, in an aromatic solvent that is selected from toluene and xylenes, whereby said anhydride is used at a ratio of 30 to 60% by weight relative to the reaction medium. More particularly, polyisobutenylsuccinic anhydrides which can be used to form, by reaction with polyethylene polyamines, compositions that contain polyisobutenylsuccinimides, used as detergent additives for motor fuels or as ashless dispersants for motor oils, are produced.

Process for production of polyisobutenylsuccinic anhydrides without

A simplified process for preparation of an alkenylsuccinimide or a polyalkenylsuccinimide is described, characterized in that it comprises successively: a stage (a) in which an alkenylsuccinic anhydride or a polyalkenylsuccinic anhydride is prepared by bringing about an ene-synthesis reaction between at least one olefin or one polyolefin and at least one unsaturated dicarboxylic anhydride that is selected from maleic anhydride and the maleic anhydrides that are substituted by 1 or 2 methyl groups, characterized in that said reaction is carried out within at least one aromatic solvent that is selected from toluene and the xylenes that are used at a ratio of between 30 to 70% by weight of the reaction mixture and in which a fraction of said unsaturated dicarboxylic anhydride does not react with said olefin or polyolefin; a stage (b) in which the product of stage (a) that contains unsaturated, unreacted dicarboxylic anhydride is reacted with at least one alcohol or an amine; and a stage (c) in which the product that is obtained in stage (b) is reacted with an amine. These succinimides can be used as detergent additives for engine fuels and as ashless dispersing additives for engine lubricants.

Simplified process for production of alkenylsuccinimides or

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Maurepas, France

Patrick Gateau