Institut Francais Du Pe'trole

Institut Fran&ccedil;ais Du P&eacute;trole

Institut Du Petrole

Fabrice Paille

Bruno Delfort

Patrick Gateau

Xavier Montagne

Thierry Lacome

St&eacute;phane Joly

Thierry Lac&ocirc;me

Isabelle Durand

Anne Jaecker

Jean-Pierre Durand

Daniel Binet

Bruno Deflort

Yves Boscher

A diese fuel composition containing a major proportion of at least one diesel fuel and a minor proportion of at least one glycerol acetal carbonate of the formulae: in which: where R1 and R2 are defined as above.

Diesel fuel compositions that contain glycerol acetal carbonates

A diesel fuel compound has a major proportion of at least one diesel fuel and a minor proportion of at least one glycerol acetal corresponding to one of general formulas:in which:

Diesel fuel compounds containing glycerol acetals

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

Diesel fuel compositions containing oxygenated compounds derived from tetrahydrofurfuryl

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

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

Growing community of inventors

Limay, France

Fabrice Paille